投稿時間:2022-03-07 20:36:40 RSSフィード2022-03-07 20:00 分まとめ(36件)

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TECH	Engadget Japanese	たった0.5秒で127言語に翻訳可能。スキャン翻訳にも対応できるAI音声翻訳機「Wooask W10」	https://japanese.engadget.com/wooask-w10-104511206.html	スキャン翻訳にも対応できるAI音声翻訳機「WooaskW」「WooaskW」主な特徴たった秒で言語翻訳に対応AI駆動・翻訳精度は衝撃のスキャン翻訳機能搭載道路標識、メニュー、商品説明なども認識インターネット不要・オフラインで翻訳可能インチタッチスクリーン・ノイズリダクション・録音機能・Bluetooth機能搭載WooaskWは言語リアルタイム翻訳対応、ポケットに収まるAI音声翻訳機です。	2022-03-07 10:45:11
TECH	Engadget Japanese	Activision BlizzardとEpic Gamesがロシアでのゲーム販売を停止	https://japanese.engadget.com/activision-blizzard-and-epic-pause-game-sales-in-russia-103017287.html	activision	2022-03-07 10:30:17
python	Pythonタグが付けられた新着投稿 - Qiita	elpyを使ってEmacsのpython環境を構築する	https://qiita.com/TomokiYamashit3/items/f5ffa77592ef9165804c		2022-03-07 19:43:35
python	Pythonタグが付けられた新着投稿 - Qiita	（備忘録）なんとなくで仮想環境を使わずにPythonを学習してたら痛い目にあった話	https://qiita.com/korosho/items/52bcafda2389b5e4a9b8	pipinstallパッケージ名で必要なパッケージをインストールして…と繰り返しているうちに、開発環境が整いました。	2022-03-07 19:21:36
Ruby	Rubyタグが付けられた新着投稿 - Qiita	村人Cの私がRuby on Railsチュートリアルを完走してみた。	https://qiita.com/kandalog/items/f6d7df858aa8f5dfbd7e	ProgateでRubyを学習ProgateでRailsを学習UdemyでRails最新のrails対応ですここまでをヶ月以内に終わらせましょうRubyonRailsチュートリアルに挑戦しっかりと準備をしてから望めば挫折することなく達成することができると思います。	2022-03-07 19:36:44
Ruby	Railsタグが付けられた新着投稿 - Qiita	Rails タグ投稿機能のコード解説	https://qiita.com/W2020T/items/d4e5b0b84c40be4e13df	・・現在取得したpostに存在するタグから、送信されてきたタグを除いたタグをoldtagsとする。	2022-03-07 19:37:34
Ruby	Railsタグが付けられた新着投稿 - Qiita	村人Cの私がRuby on Railsチュートリアルを完走してみた。	https://qiita.com/kandalog/items/f6d7df858aa8f5dfbd7e	ProgateでRubyを学習ProgateでRailsを学習UdemyでRails最新のrails対応ですここまでをヶ月以内に終わらせましょうRubyonRailsチュートリアルに挑戦しっかりと準備をしてから望めば挫折することなく達成することができると思います。	2022-03-07 19:36:44
Ruby	Railsタグが付けられた新着投稿 - Qiita	【Rails】ログアウトしてる状態でホーム画面にアクセスしたら、ログイン画面に遷移してしまう問題とその解決方法	https://qiita.com/yusuke888/items/290f04a00b82feaa7fad	当然これを設定するならば、その読み込まれる定義自体もセットでないとダメ。	2022-03-07 19:00:54
Ruby	Railsタグが付けられた新着投稿 - Qiita	カスタムドメインを設定する(Heroku)	https://qiita.com/Daichi-appy/items/840c99cb6b4cf69f83a7	カスタムドメインを設定するHerokuこれまでHerokuのデフォルトで設定されるドメインを使っていたので変更した。	2022-03-07 19:15:32
海外TECH	DEV Community	Java Object Oriented Programming	https://dev.to/killallnano/java-object-oriented-programming-6bm	Java Object Oriented ProgrammingObject oriented programming takes advantage of our perception of world An object is an encapsulated completely specified data aggregate containing attributes and behavior Data hiding protects the implementation from interference by other objects and defines approved interface An object oriented program is a growing and shrinking collection of objects that interact via messages You can send the same message to similar objects the target decides how to implement or respond to a message at run time Objects with same characteristics are called instances of a class This article extendsJava for Beginners Introduction to Java Java for beginners Installation of JavaJava for beginners Fundamentals of Java Kindly check on them to have a better understanding on this article Benefits of object oriented programming include Troubleshooting is easy in OOP through modularityBenefit of code re usability through inheritanceData redundancy is reducedCode flexibility emphasis through polymorphismEffective problem solving Java ClassesA class is essentially an abstract data type that provides a template from which objects are created Class consists of a collection of data together with functions that operate on the data Data is referred to as data members and functions are referred to as member functions of a class By declaring a class we create a new data type that is as powerful as any of the basic types class syntaxclass lt classname gt body Exampleclass Student body Class data memberIn a class the members are by default hidden within the class and cannot be accessed from outside We say that the members of a class are declared private by default However if we want to we can declare members of a class to be public Syntaxclass lt classname gt lt data type gt lt variable name gt body Exampleclass Student String student name int marks Character grade body Class member functions methods Member functions of a class are also referred to as methods If we make the member data of our student class private we should provide functions to access the data for setting manipulating or printing Encapsulation and data hidingEncapsulation is the technique of making the fields in a class private and providing access to the fields via public methods If a field is declared private it cannot be accessed by anyone outside the class thereby hiding the fields within the class Encapsulation can be described as a protective barrier that prevents the code and data being randomly accessed by other code defined outside the class Access to the data and code is tightly controlled by an interface Encapsulation gives maintainability flexibility and extensibility to our code Data encapsulation led to the important OOP concept of data hiding Java Variable TypesIn Java all variables must be declared before they can be used The basic form of a variable declaration is shown here lt type gt lt identifier gt lt value gt e gString name Jeff Odhiambo The type is one of Java s data types The identifier is the name of the variable To declare more than one variable of the specified type use a comma separated list Java supports the following types of variables Local variablesLocal variables are declared in methods constructors or blocks Local variables are created when the method constructor or block is entered and the variable will be destroyed once it exits the method constructor or block Access modifiers cannot be used for local variables Local variables are visible only within the declared method constructor or block Local variables are implemented at stack level internally There is no default value for local variables so local variablesshould be declared and an initial value should be assigned before the first use Class static VariablesClass variables are shared by all the instances of the class Class variables also known as static variables are declared with the static keyword in a class but outside a method constructor or a block Class methods are not tied to a specific object There would only be one copy of each class variable per class regardless of how many objects are created from it Static variables are created when the program starts and destroyed when the program stops Static variables can be accessed by calling with the class name Syntax ClassName VariableName e g Math PI Constants Final Variables Any variable either member variable or local variable declared inside method or block modified by final keyword is called final variable Final variables are often declare with static keyword in java and treated as constant A final variable can only be initialized once either via an initializer or an assignment statement Class constants are final variables shared by all the instances of the class Class variables constants and methods are used with class name such as Math pow Math PI To declare class variables constants and methods use the static modifier When declaring class variables as public static final then variables names constants are all in upper case If the static variables are not public and finalthe naming syntax is the same as instance and local variables Exampleimport java io public class Employee salary variable is a private static variable private static double salary DEPARTMENT is a constant public static final String DEPARTMENT Development public static void main String args salary System out println DEPARTMENT average salary salary Instance variablesInstance variables are declared in a class but outside a method constructor or any block When a space is allocated for an object in the heap a slot for each instance variable value is created Instance variables are created when an object is created with the use of the key word new and destroyed when the object is destroyed Instance variables hold values that must be referenced by more than one method constructor or block or essential parts of an object s state that must be present throughout the class Instance variables can be declared in class level before or after use Access modifiers can be given for instance variables The instance variables are visible for all methods constructors and block in the class Normally it is recommended to make these variables private access level However visibility for sub classes can be given for these variables with the use of access modifiers Instance variables have default values For numbers the default value is for Booleans it is false and for object references it is null Values can be assigned during the declaration or within the constructor Instance variables can be accessed directly by calling the variable name inside the class However within static methods and different class when instance variables are given accessibility the should be called using the fully qualified name ObjectReference VariableName Scope of VariablesThe scope of instance and class variables is the entire class They can be declared anywhere inside a class They are global variables The scope of a local variable starts from its declaration and continues to the end of the block that contains the variable A local variable must be declared before it can be used E g Visibility Modifiers and Accessor MethodsBy default the class variable or data can be accessed by any function in the class in which they are declared Visibility modifiers include Public The class data or method is visible to any class in any package Private The data or methods can be accessed only by the declaring class Protected Accessor methods Setters and Getters Methods The getter and setter accessor methods are used to read and modify private properties in a class These methods are also called accessor methods The syntax for accessor methods is public class AccessorExample private String attribute public String getAttribute return attribute public void setAttribute String attribute this attribute attribute Java this KeywordThe keyword this in Java refers to the current class instance Within an instance method or a constructor this is a reference to the current object Therefore this can be used inside any method to refer to the current object You can refer to any member of the current object from within an instance method or a constructor by using this The keyword can also be used to call overloaded constructors Using this to access a shadowed fieldThe most common reason for using the this keyword is because a field is shadowed by a method or constructor parameter For example the Point class was written like thispublic class Point public int x public int y constructor public Point int a int b x a y b but it could have been written like this public class Point public int x public int y constructor public Point int x int y this x x this y y Each argument to the constructor shadows one of the object s fields ーinside the constructor x is a local copy of the constructor s first argument To refer to the Point field x the constructor must use this x Using this to call a Constructor from another constructorFrom within a constructor you can also use the this keyword to call another constructor in the same class Doing so is called an explicit constructor invocation Here s another Rectangle class with a different implementation from the one in the Objects section public class Rectangle private int x y private int width height public Rectangle this public Rectangle int width int height this width height public Rectangle int x int y int width int height this x x this y y this width width this height height This class contains a set of constructors Each constructor initializes some or all of the rectangle s member variables The constructors provide a default value for any member variable whose initial value is not provided by an argument Data encapsulationData encapsulation is a mechanism of bundling the data and the functions that use them Examplepublic class Student private String name private String idNum private int age public int getAge return age public String getName return name public String getIdNum return idNum public void setAge int newAge age newAge public void setName String newName name newName public void setIdNum String newId idNum newId Encapsulation using “this Examplepublic class Student private String name private String idNum private int age public int getAge return age public String getName return name public String getIdNum return idNum public void setAge int age this age age public void setName String name this name name public void setIdNum String idNum this idNum idNum Advantage of Encapsulation in Java and OOPSHere are few advantages of using Encapsulation while writing code in Java or any Object oriented programming language Encapsulated Code is more flexible and easy to change with new requirements Encapsulation in Java makes unit testing easy Encapsulation in Java allows you to control who can access what Encapsulation also helps to write immutable class in Java which are a good choice in multi threading environment Encapsulation reduce coupling of modules and increase cohesion inside a module because all piece of one thing are encapsulated in one place Encapsulation allows you to change one part of code without affecting other part of code Relationships among Classes AssociationAssociation is a relationship between two objects Association represents a general binary relationship that describes an activity between two classes The association relationship is a way of describing that a class knows about and holds a reference to another class You may be aware of one to one one to many many to one many to many all these words define an association between objects AggregationAggregation is a relationship between two classes that is best described as a has a and whole part relationship Aggregation models the relationship like has a part of owns and employed by When an object has a another object then you have got an aggregation between them Direction between them specifies which object contains the other object Aggregation is also called a “Has a relationship ExampleThere is an aggregation relationship between Student class and the Subject class public class Subject private String name public void setName String name this name name public String getName return name public class Student private Subject studyAreas new Subject Find more examples here CompositionComposition is restricted aggregation When an object contains the other object i e if the contained object cannot exist without the existence of container object then it is called composition Example A class contains students A student cannot exist without a class There exists composition between class and students AbstractionAbstraction is specifying the framework and hiding the implementation level information Concreteness will be built on top of the abstraction It gives you ablueprint to follow to while implementing the details Abstraction reduces the complexity by hiding low level details Example A wire frame model of a car GeneralizationGeneralization uses a “is a relationship from a specialization to the generalization class Common structure and behavior are used from the specialization to the generalized class At a very broader level you can understand this as inheritance Why I take the term inheritance is you can relate this term very well Example Consider there exists a class named Person A student is a person A faculty is a person Therefore here the relationship between student and person similarly faculty and person is generalization RealizationRealization is a relationship between the blueprint class and the object containing its respective implementation level details This object is said torealize the blueprint class In other words you can understand this as the relationship between the interface and the implementing class Example A particular model of a car GTB Fiorano that implements the blueprint of a car realizes the abstraction DependencyChange in structure or behavior of a class affects the other related class then there is a dependency between those two classes It need not be the same on the vice versa When one class contains the other class this happens Example Relationship between shape and circle is dependency Inheritance developed from Inheritance models the “is a relationship between two classes It is a mechanism where a new class is derived from an existing class In Java classes may inherit or acquire the non private properties and methods of other classes A class derived from another class is called a subclass whereasthe class from which a subclass is derived is called a super class A subclass can have only one super class whereas a super class may have one or more sub classes Any class in java that does not extend any other class implicitly extends Object class Therefore the java lang Object class is always at the top of any Class inheritance hierarchy In Java inheritance is used for two purposes Class inheritance create a new class as an extension of another class primarily for the purpose of code reuse That is the derived class inherits the public methods and public data of the base class Java only allows a class to have one immediate base class i e single class inheritance The keyword “extends is used to derive a subclass from the superclass as illustrated by the following syntax syntaxpublic class derived class name extends base class name derived class methods extend and possibly override those of the base class exampleclass A properties and methods of A class B extends A Class inheritance defines a is a relationship between a superclass and its subclasses Therefore inheritance is achieved at class level We can therefore define inheritance in java as mechanism is used to build new classes from existing classes For example public class Animal public class Mammal extends Animal public class Reptile extends Animal public class Dog extends Mammal In Object Oriented terms following are true Animal is the super class of Mammal class Animal is the super class of Reptile class Mammal and Reptile are sub classes of Animal class Dog is the subclass of both Mammal and Animal classes Now if we consider the IS A relationship we can say Mammal IS A AnimalReptile IS A AnimalDog IS A MammalHence Dog IS A Animal as wellWith use of extends keyword the sub classes will be able to inherit all the properties of the super class except for the private properties of the super class Below is a sample implementation of the Dog class public class Dog extends Mammal public static void main String args Animal a new Animal Mammal m new Mammal Dog d new Dog System out println m instanceof Animal Outputs true System out println d instanceof Mammal Outputs true System out println d instanceof Animal Outputs true The Boolean instanceof operator is used to determine whether Mammal is actually an Animal and dog is actually an Animal super keyword super is used for pointing the super class instance That is it is a reference variable that is used to refer immediate parent class object The keyword super will therefore be used when referring to the super class of an object Uses of super Keywordsuper is used to refer immediate parent class instance variable super is used to invoke immediate parent class constructor super is used to invoke immediate parent class method Using the super keyword to call immediate parent class constructorThe syntax for calling a super class constructor issuper or super parameter list NB In a constructor super MUST always be the first statement to appear Example class Vehicle Vehicle System out println Vehicle is created Void start System out println Vehicle is starting class Bike extends Vehicle Bike super will invoke parent class constructor System out println Bike is created public static void main String args Bike b new Bike Output Vehicle is createdBike is createdWith super the super class no argument constructor is called With super parameter list the super class constructor with a matching parameter list is called If accessing a method in super class we use the syntax super methodName argument s super start Method OverridingWhen a sub class defines a method that has same name signature and return type or compatible with return type of super class method it is called method overriding In object oriented terms overriding means to override the functionality of any existing method The benefit of overriding is ability to define a behavior that s specific to the sub class type Which means a subclass can implement a parent class method based on its requirement Consider the following exampleclass Animal public void move System out println Animals can move class Dog extends Animal public void move System out println Dogs can walk and run public class TestDog public static void main String args Animal a new Animal Animal reference and object Animal b new Dog Animal reference but Dog object a move runs the method in Animal class b move Runs the method in Dog class This would produce following result Animals can moveDogs can walk and runIn the above example you can see that the even though b is a type of Animal it runs the move method in the Dog class The reason for this is In compile time the check is made on the reference type However in the runtime JVM figures out the object type and would run the method that belongs to that particular object Therefore in the above example the program will compile properly since Animal class has the method move Then at the runtime it runs the method specific for that object Consider the following example class Animal public void move System out println Animals can move class Dog extends Animal public void move System out println Dogs can walk and run public void bark System out println Dogs can bark public class TestDog public static void main String args Animal a new Animal Animal reference and object Animal b new Dog Animal reference but Dog object a move runs the method in Animal class b move Runs the method in Dog class b bark This would produce following result TestDog java cannot find symbolsymbol method bark location class Animalb bark This program will throw a compile time error since b s reference type Animal doesn t have a method by the name of bark Using the super keyword to call overridden methodWhen invoking a super class version of an overridden method the super keyword is used class Animal public void move System out println Animals can move class Dog extends Animal public void move super move invokes the super class method System out println Dogs can walk and run public class TestDog public static void main String args Animal b new Dog Animal reference but Dog object b move Runs the method in Dog class This would produce following result Animals can moveDogs can walk and run Rules for method overriding The argument list should be exactly the same as that of the overridden method The return type should be the same or a sub type of the return type declared in the original overridden method in the super class The access level cannot be more restrictive than the overridden method s access level For example if the super class method is declared public then the overridding method in the sub class cannot be either private or protected Instance methods can be overridden only if they are inherited by the subclass A method declared final cannot be overridden A method declared static cannot be overridden but can be re declared If a method cannot be inherited then it cannot be overridden A subclass within the same package as the instance s superclass can override any superclass method that is not declared private or final A subclass in a different package can only override the non final methods declared public or protected An overriding method can throw any uncheck exceptions regardless of whether the overridden method throws exceptions or not However the overriding method should not throw checked exceptions that are new or broader than the ones declared by the overridden method The overriding method can throw narrower or fewer exceptions than the overridden method Constructors cannot be overridden Data abstractionAbstraction is the concept of object oriented programming that “shows only essential attributes and “hides unnecessary information The main purpose of abstraction is hiding the unnecessary details from the users The implementation details is hidded from the user Abstraction is achieved using either abstract classes or interfaces Class AbstractionClass abstraction means to separate class implementation from the use of the class The creator of the class provides a description of the class and let the user know how the class can be used The user of the class does not need to know how the class is implemented The detail of implementation is encapsulated and hidden from the user Abstract Classes and Abstract MethodsAn abstract class is a restricted class that cannot be used to create objects to access it it must be inherited from another class An abstract class leaves one or more method implementations unspecified by declaring one or more methods abstract An abstract can only be used as a super class for other classes thatextend the abstract class Abstract classes are declared with the abstract keyword Abstract classes are used to provide a template or design for concrete subclasses down the inheritance tree Abstract methods are methods with no body specification implementation Abstract methods can only be used in an abstract class and it does not have a body I e Abstract method would have no definition and its signature is followed by a semicolon not curly braces The body is provided by the subclass inherited from The abstract keyword is a non access modifier used for classes and methods The abstract keyword is used to declare a class or a method as abstract An abstract method consists of a method signature but no method body Exampleabstract class Shape public String color public Shape public void setColor String c color c public String getColor return color abstract public double area Note that If a class has at least one abstract method the class must be declared as abstract A subclass is therefore required to override the abstract method and provide an implementation Subclasses must provide the method statements for their particular meaning If the method was one provided by the superclass it would require overriding in each subclass Hence an abstract class is incomplete and cannot be instantiated but can be used as a base class The abstract class guarantees that each shape will have the same set of basic properties We declare this class abstract because there is no such thing as a generic shape There can only be concrete shapes such as squares circles triangles etc public class Point extends Shape static int x y public Point x y public double area return public double perimeter return public static void print System out println point x y public static void main String args Point p new Point p print Points to RememberAn abstract class must be declared with an abstract keyword It can have abstract and non abstract methods It cannot be instantiated It can have constructors and static methods also It can have final methods which will force the subclass not to change the body of the method InterfacesAn interface in Java is a blueprint of a class It consists of static constants and abstract methods In Java an interface is a mechanism to achieve abstraction There can be only abstract methods in a Java interface No need to include keyword abstract when declaring abstract methods in in interface Just like an abstract class an interface cannot be instantiated You can declare an interface in its own file like a class In such a case File name must be the same as the class name Java Interface also represents the IS A relationship Declaring InterfacesThe interface keyword is used to declare an interface Syntax interface lt interface name gt declare constant fields declare abstract methods Example File name Animal java interface Animal public void eat public void travel Implementing an interfaceClass inheritance in java uses the keyword extends To access the interface methods the interface must be implemented inherited by another class using the implements keyword instead of extends During implementation the body of each interface method is provided by the implementing class Syntax public class class name implements interface name class provides an implementation for the methods as specified by the interface Example interface Animal public void makeSound interface method does not have a body public void sleep interface method does not have a body Donkey implements the Animal interface class Donkey implements Animal public void makeSound The body of animalSound is provided here System out println The donkey says hee hoo public void sleep The body of sleep is provided here System out println Zzz public class DonkeyImpl public static void main String args Donkey dnk new Donkey Create a Donkey object dnk makeSound dnk sleep Why use Java interface There are mainly three reasons to use interface They are given below It is used to achieve abstraction By interface we can support the functionality of multiple inheritance It can be used to achieve loose coupling Interfaces are preferred to classes because they help us to to achieve abstraction as wellas multiple inheritance in Java Extending InterfacesAn interface can extend another interface in the same way that a class can extend another class The extends keyword is used to extend an interface and the childinterface inherits the methods of the parent interface Example Filename Sports javapublic interface Sports public void setHomeTeam String name public void setVisitingTeam String name Filename Football javapublic interface Football extends Sports public void homeTeamScored int points public void visitingTeamScored int points public void endOfQuarter int quarter Filename Hockey javapublic interface Hockey extends Sports public void homeGoalScored public void visitingGoalScored public void endOfPeriod int period public void overtimePeriod int ot Multiple Class Inheritance in JavaA class can extends ONLY one parent class using the extends keyword Multiple class inheritance is not allowed Class inheritance inheritance in java has the following limitations A subclass cannot inherit private members of its super class A subclass can have only one super class Constructor and initializer blocks cannot be inherited by a subclass Interfaces are not classes thus you are allowed to inherit one or more interfaces Multiple inheritance by interface occurs if a class implements multiple interfaces or also if an interface itself extends multiple interfaces Extending Multiple InterfacesTo achieve multiple inheritance java allows you to implement more than one parent interfaces by declaring them in a comma separated list E g public interface Hockey extends Sports EventNote that an interface can extend more than one parent interface Difference between Abstraction and Encapsulation Difference between Abstract Class and InterfaceIn the next article we will discuss Polymorphism in java in depth Thanks for taking your time to read this article	2022-03-07 10:43:46
海外TECH	DEV Community	10 Women Who Changed the Tech World	https://dev.to/helenanders26/10-women-who-changed-the-tech-world-1606	Women Who Changed the Tech WorldFrom early computers to wartime inventions the beginnings of the internet and beyond Women have always been innovators in technology and science breaking down barriers in the process In honour of International Women s Day I ve chosen to highlight the women who inspire and influence me These women have shown us new ways to use technology opened doors for others and changed the world Hedy LamarrKatsuko SaruhashiKathleen BoothYvonne BrillAnnie EasleyIda HolzKaren Spärck JonesLynn ConwayKanchana KanchanasutJanese Swanson Hedy Lamarr Inventor and actressWell known for her iconic roles in films of the s and s Hedy Lamarr was also an inventor She improved the aerodynamics of Howard Hughes planes by designing a new wing shape and created technology that would become the wifi GPS and Bluetooth we use today Born in Austria Hedy began acting in her teens and played significant roles in European films during the s She ultimately escaped an overly controlling husband to London then sailed to the United States She continued her acting career in New York City and Hollywood starring in MGM films During this time she also honed her skills as a self taught inventor The technology she developed with fellow inventor George Antheil uses rapidly changing radio frequencies to prevent enemies from decoding messages This system was called frequency hopping and was a precursor to modern cellphone security as well as military communications Hedy wasn t recognised for her invention until years later when her patent had long lapsed but went on to become the first woman to receive the Bulbie Gnass Spirit of Achievement Award and Electronic Frontier Foundation EFF Pioneer Award I love Hedy s story and how she pursued her interests in technology while working in film She dedicated so much energy to inventing all while the world knew her as simply the most beautiful woman in the world There s a lot more to Hedy s story so check out the links to learn more about her life Further reading Hedy Lamarr on the Hollywood Walk of FameThe Girls in the White DressHedy Lamarr The Incredible Mind Behind Secure WiFi GPS And BluetoothHow Sexism Punished Inventor Hedy LamarrThank This World War II Era Film Star for Your Wi FiImage source Wikicommons Katsuko Saruhashi GeochemistKatsuko Saruhashi is known for her discoveries in geochemistry and for paving the way for women in the field by advocating for them and their work Katsuko researched and made groundbreaking discoveries bringing attention to the effect of nuclear fallout and CO in oceans There was controversy around her research at first as it was originally thought the fallout would disperse evenly through the ocean The US Atomic Energy Commission had her come to the USA to repeat the experiments and compare methods This research was so groundbreaking it became the global standard It also contributed to putting a stop to nuclear testing in the Pacific Not only did Katsuko earn a PhD in chemistry the first for the University of Tokyo she also received Japan s Miyake Prize for geochemistry the Avon Special Prize for Women for promoting the peaceful use of nuclear power and the Tanaka Prize from the Society of Sea Water Sciences Through her success she gave back by creating the Society of Japanese Women Scientists and the Saruhashi Prize to recognise the achievements of women in science Katsuko s work is particularly important as we learn more about how we are affecting our environment As a New Zealander growing up in the s nuclear testing in the Pacific was a hot topic Thanks to Katsuko the world has had to think more critically about climate change and the important role women play in science and technology Check out the links for more about Katsuko s work and legacy I would like to see the day when women can contribute to science amp technology on an equal footing with men Further reading Meet Katsuko Saruhashi a resilient geochemist who detected nuclear fallout in the PacificKatsuko Saruhashi turned radioactive fallout into a scientific legacyWho Was Katsuko Saruhashi Things To Know About The Feminist GeochemistKatsuko Saruhashi Why Google honours her todayImage Sankei Archive Getty Images Kathleen Booth Computer scientistKathleen Booth is the creator of the world s first assembly language three early computers and an early machine learning engineer Before computer science degrees existed the C language or Kathleen s assembly language was written computers had no way to store code The breakthroughs made by Kathleen and her team made it possible to move away from manually programming with cables and switches and bought computers into the future Her other accomplishments include the first investigation into asynchronous v synchronous operations in linguistic processing creating games on computers and early implementations of machine learning in the s Kathleen s research and pioneering work changed the world of technology forever Read more about her incredible work and groundbreaking research in the links below Further reading Kathleen Booth Assembling Early Computers While Inventing AssemblyComputing History profileKathleen Booth in Memory of LegendsProgrammers Assemble profileImage Birkbeck Yvonne Brill Jet propulsion engineerYvonne Brill was a distinguished and award winning rocket and jet propulsion engineer Her work not only contributed to the reliability of systems used in space exploration but she returned to her research after raising a family in a time when this was not the norm Yvonne s career began in the field of mathematics and chemistry before moving into rocket science She was the first female to enter the field in the s Her most famous invention was the hydrazine resistoject propulsion system now the industry standard for keeping satellites in orbit Her many honours include the National Medal of Technology and Innovation the nation s highest honour for engineers and innovators the NASA Distinguished Public Service Medal the AIAA Wyld Propulsion Award and the American Association of Engineering Societies John Fritz Medal Even with all her awards and accomplishments the New York Times overlooked them in her obituary This has since been amended but before the outcry they focused on highlighting how she made a mean beef stroganoff before mentioning her groundbreaking research Read more about her contributions to aeroscience below I think my biggest contribution now can be to ensure that women who deserve to be nominated for awards get nominated Further reading NY Times Changes Yvonne Brill Obituary After CriticismKnow Your Scientist Yvonne BrillPioneer Canadian rocket scientist dead at age Image NY Times Annie Easley Mathematician and rocket scientistAnnie Easley was a NASA computer and rocket scientist who made modern spaceflight possible She was also an accomplished athlete speaker and tutor During her time at NASA Annie worked as a human computer playing a crucial role in everything from improving aeroplane stability to charting spacecraft trajectories Later she worked with FORTRAN SOAP and the code used in alternative energy research The technology she developed the Centaur rocket was the first of its kind and uses liquid hydrogen and liquid oxygen to boost rockets into space This is still in use today and has powered exploration to the moon Mars and Saturn In addition to her career in science spanning over years she is remembered for her contributions to the community She helped members of her community prepare for literacy tests designed to exclude African Americans from registering to vote Annie s work broke down barriers for women and people of colour and continues to inspire I knew I had the ability to do it and that s where my focus was on getting the job done I was not intentionally trying to be a pioneer Further reading Annie Easley helped make modern spaceflight possibleMeet Annie Easley the barrier breaking mathematician who helped us explore the solar systemBlack Past profileNASA profileImage scientificwomen net Ida Holz Computer scientist and engineerIda Holz is known for her work bringing the internet to Uruguay This was recognised by the Latin America and Caribbean Network Information Centre with the Lifetime Achievement Award in and the Internet Hall of Fame in Ida was one of the first Uruguayan computer science students while the country was under military rule She and her family sought exile in Mexico where she became an expert in computer networking After returning to Uruguay she worked for the Central Computer Service for years During this time she established the top level country domain and first internet connection for Uruguay in This groundbreaking work led to collaboration across countries and the formation of the Latin American Network Forum the Latin American and Caribbean Internet Address Registry the organisation of Latin American and Caribbean ccTLDs and the Latin American Cooperative of Advanced Networks RedCLARA Ida has also given back by creating an initiative to implement the “one laptop per child model to introduce technology to public schools Ida has truly changed the world for South America and her recognition in the Internet Hall of Fame is incredibly well deserved For developing countries like ours the Internet is a means of collaborating and access to knowledge all around the world alike Further reading Ida Holz ーLatin American Internet PioneerFrom Uruguay to the worldIda Holz “We Must Change Everything In Education From Structures To Forms Of Conduction Uruguayan Ida Holz in the Internet Hall of FameImage Women with Science Karen Spärck Jones Computer scientistKaren Spärck Jones worked in computer science in the fields of natural language processing and inverse document frequency since the s This research formed the technology that powers the search engines we use today Her work extended to teaching and elevating women in computer science She mentored PhD students spoke at the first Grace Hopper Conference and set standards for work in the natural language processing field Her research was recognised by the American Society for Information Science and Technology the Association for Computational Linguistics the American Association for Artificial Intelligence among many others Women bring a different perspective to computing they are more thoughtful and less inclined to go straight for technical fixes Further reading Geek Feminism profileA week of Women in STEM Karen Spärck JonesWhy SEOs should get to know Karen Spärck Jones the originator of search engine algorithmsImage University of Cambridge Lynn Conway Computer scientistLynn Conway is a computer scientist former professor and advocate for transgender people Lynn studied physics engineering and applied science at MIT and Colombia University She went on to work at IBM making considerable contributions inventing multiple issue out of order dynamic instruction scheduling that enhanced computer processing power This work was cut short when she was fired in for revealing her intention to undergo gender affirmation surgery She then started her career from scratch at Computer Applications Inc and Xerox going on to create VSLI technology that allows many more tiny transistors to be arranged on an integrated circuit During this time she kept her past identity a secret It was only when she was nearing retirement when her work at IBM was likely to be revealed when she was comfortable telling her story She is now a prominent advocate for transgender people and has been honoured for this work by President Obama In IBM apologised for firing Lynn and awarded her with their Lifetime Achievement Award Her work both in technology and her work as an advocate has changed millions of lives and should be celebrated If you want to change the future start living as if you re already there Further reading Life EngineeredThank Lynn Conway for your cell phoneLynn Conway talks career LGBT advocacyThe Many Shades of Out Image thenewshouse com Kanchana Kanchanasut Computer scientistKanchana Kanchanasut is a computer scientist and researcher who bought the internet to Thailand Her work establishing connections between universities and registering the top level domain for Thailand earned her honours from the Internet Hall of Fame in the Pioneer category Her studies in computer science began in Australia where she earned a PhD in Philosophy from the University of Melbourne She continued her research work at the Asian Institute of Technology building the first computer network in Thailand to communicate outside of the Kingdom More recently she started the Bangkok Internet Exchange BKNIX the first open and neutral internet exchange point in Southeast Asia Further reading AIT s Prof Kanchana inducted into global Internet Hall of FameThai professor wins internet awardInternet Hall of Fame profileGISWatch profileImage eurekalert org Janese Swanson Software developerJanese Swanson is best known for her award winning games and toys designed to encourage girls to learn more about technology Her dedication to innovative product design and not submitting to manufacturers pleas to make her inventions pink have changed how the world thinks about girls toys Her work at Broderbund in the s saw her developing software with children in mind This included co developing the Where in the World Is Carmen Sandiego video game In she went on to found her own company Girl Tech creating a voice activated diary lockbox the Friend Frame and books on technology Her work has been recognised by the National Association of Women Business Owners Women in Communications Webgirls and the YWCA of the USA There is a real need in our culture to introduce girls to technology based products and electronics at an early age Further reading Janese Swanson Inventing a Better WayInnovative Lives Janese Swanson Beyond Pink and FluffyWomen Art amp Technology profileHigh Tech Girls ToysImage Tech HeroinesThis is by no means a complete list of all the incredible pioneering women in technology and science who have paved the way for us There are many others who pushed the boundaries of what was expected of them and changed the world If the tech industry is to move forward and become more diverse we need to celebrate their stories and encourage those who are following in their footsteps I hope this post inspires you to Breakthebias or encourage the women in your life	2022-03-07 10:43:23
海外TECH	DEV Community	Deep dive into Laravel Pagination - PHP IteratorAggregate	https://dev.to/ngodinhcuong/deep-dive-into-laravel-pagination-php-iteratoraggregate-569i	Deep dive into Laravel Pagination PHP IteratorAggregateRegarding to Laravel pagination doc when calling the paginate method you will receive an instance of Illuminate Pagination LengthAwarePaginator When calling the simplePaginate method you will receive an instance of Illuminate Pagination Paginator These objects provide several methods that describe the result set In addition to these helpers methods the paginator instances are iterators and may be looped as an array There is a basic example of Laravel pagination in your projectpublic function index Request request users User paginate return view user index users gt users lt div class container gt foreach users as user user gt name endforeach lt div gt Here is what you see in detail of users variableNow let look at inside LengthAwarePaginator class we can see that it implements several interfaces such as ArrayAccess Countable IteratorAggregate JsonSerializable which are known as predefined interfaces in PHP This class also extends AbstractPaginator which has getIterator to return ArrayIteratorIn this case we consider the IteratorAggregate is an interface to create an external Iterator which allows you to traverse your custom class objects using foreach With the Interface synopsis IteratorAggregate extends Traversable interface itself is an abstract base interface with no methods as shown in the interface synopsis that cannot be instantiated However it can be used to check whether a class is traversable using foreach or not class Food implements IteratorAggregate public array arr public function construct this gt arr Milk Cake Coke public function getIterator return new ArrayIterator this gt arr obj new Food foreach obj as key gt value echo key gt value n OUTPUT gt Milk gt Cake gt Coke IteratorAggregate is an easy way to implement an Iterator The advantage with IteratorAggregate is the speed it is much faster than its alternatives The problem with it it s that despite the name it s not an iterator but a traversable so again no next key current valid rewind methods	2022-03-07 10:27:54
海外TECH	DEV Community	Emojicode - Code with emojis 😎 (Introduction)	https://dev.to/knaagar/emojicode-code-with-emojis-introduction-489f	Emojicode Code with emojis Introduction Let s make our code beautiful and attractive Let s code with emojis In this article I ll cover Introduction to Emojicode gt st article blog of part series What is this programming in emojis Yeahhh programming with emojis Emojicode is an open source strongly typed programming language consisting of emojis created by Theo Weidmann Let s begin So before getting to the basics of programming let me tell you where you can code this language You can run your Emojicode programs locally by following the steps of installation on their main website Install LocallyYou can start right away using the online editor of TIO Online TIO Editor Extension We write Emojicode programs in files with the extension emojic or Basic Structure All code will be inside block The block indicates all the code that should run when the file is executed For larger programs we use and to add more blocks gt the start of the code block gt the end of the code blockSo basic emojicode file will look like this code here Print stuff To print in Emojicode we use the ️code to print ️ Strings If you have ever worked with a programming language then you must have worked with strings But for newbies Strings are a form of data type for computer Strings are pieces of text Strings in Emojicode has to be wrapped around Here s an example of printing a string in emojicode CommentsComments are lines of code that you don t want to execute Comments can explain what the code is doing or leave instructions There are two types of comments Single line gt comment out a single line and starts with a in emojicode Multi line gt comment out multiple lines and starts with and ends with in emojicode single line commentprinting a string Practicing comments️ Multi line comment TIP Press Win key combination on windows or Control Command Spacebar on mac to bring the emoji keyboard Thank You Stay Tuned for other parts	2022-03-07 10:24:04
海外TECH	DEV Community	Future Javascript: ShadowRealms	https://dev.to/smpnjn/future-javascript-shadowrealms-20mg	Future Javascript ShadowRealmsIt sounds dark and mysterious but it s just another future Javascript feature The ShadowRealm is a new feature coming to Javascript which will let us create a separate global context from which to execute Javascript In this article we ll look at what the ShadowRealm is and how it works Support for ShadowRealms in JavascriptShadowRealms are a Javascript proposal currently at Stage As such ShadowRealms do not have support in browsers or natively in server side languages like Node JS and given it has had many changes over the years there is no stable babel or npm plugin to polyfill the functionality However given it has reached Stage this means there won t be very many changes going forward and we can expect ShadowRealms to have native support at some point in the future How ShadowRealms in Javascript workA ShadowRealm is ultimately a way to set up a totally new environment with a different global object separating the code off from other realms When we talk about a global object in Javascript we are referring to the concept of window or globalThis The problem that ShadowRealm ultimately tries to solve is to reduce conflict between different sets of code and provide a safe environment for executing and running code that needs to be run in isolation It means less pollution in the global object from other pieces of code or packages As such code within a ShadowRealm cannot interact with objects in different realms ShadowRealm Use Cases Code editors where the user can edit code and which we don t want to interact with the main webpage Plugins that can be executed independently Emulating the DOM in a separated environment i e if we need to know the scroll position in certain scenarios we could emulate it within a ShadowRealm so that the user scrolling on the main webpage would not affect the window top variable in our emulation ShadowRealms run on the same thread as all other Javascript so if you want to multi thread your Javascript you still have to use Web Workers As such a ShadowRealm can exist within a worker as well as within a regular Javascript file ShadowRealms can even exist within other ShadowRealms Creating a ShadowRealm in JavascriptLet s look at how a ShadowRealm actually looks in code The first thing we have to do is call a new ShadowRealm instance We can then import some Javascript into our Realm which will run within it For this we use a function called importValue which works effectively in the same way as import let myRealm new ShadowRealm let myFunction await myRealm importValue function script js analyseFiles Now we can run our function within our ShadowRealmlet fileAnalysis myFunctions In the above example analyseFiles is the export name we are importing from function script js We then capture and store this export within myFunction Significantly the export we import into our realm must be callable so it must effectively be a function we can run Our function script js file is just a normal Javascript file with an export It may look something like this export function analyseFiles console log hello The ShadowRealm is totally separate from other global objects we may have such as window or globalThis Similar to other imports we can use the curly bracket import notation let myRealm new ShadowRealm const runFunction testFunction createFunction await myRealm importValue function script js let fileAnalysis runFunction Or we can create multiple promises that all translate into an array if we want to use named importValues let myRealm new ShadowRealm const runFunction testFunction createFunction await Promise all myRealm importValue file one js runFunction myRealm importValue file two js testFunction myRealm importValue file three js createFunction let fileAnalysis runFunction Executing Code with evaluate in ShadowRealmsShould we want to execute code directly in a ShadowRealm which does not come from another file we can use the evaluate method on our ShadowRealm to execute a string of Javascript This works in much the same way as eval let myRealm new ShadowRealm myRealm evaluate console log hello ShadowRealm importValue is thennableSince importValue returns a promise its value is thennable That means we can use then on it and then do something with the output function that it returns For example window myVariable hello let myRealm new ShadowRealm myRealm importValue someFile js createFunction then createFunction gt Do something with createFunction console log window myVariable Returns undefined The cool thing about this is that the global object does not leak into the then statement So window myVariable is undefined This provides us with a totally isolated area of our code where we don t have to worry about interferance from the global object We can also use this methodology to access global variables defined in someFile js For example let s say we changed someFile js to this globalThis name fjolt export function returnGlobals property return globalThis property Now in our then function we could get the value of globalThis name window myVariable hello let myRealm new ShadowRealm myRealm importValue someFile js returnGlobals then returnGlobals gt Do something with returnGlobals console log returnGlobals name Returns fjolt console log window myVariable Returns undefined ConclusionToday iframes are the way we usually separate out separate environments on the web iframes are clunky and can be quite annoying to work with ShadowRealms on the other hand are more efficient allow us to easily integrate with our existing code base and integrate well with modern Javascript technologies like Web Workers Given their unique value proposition of providing a separated area for code execution which does not interact at all with the rest of the code base ShadowRealms will likely become a staple in writing Javascript code They could become an important way for packages and modules to export their contents without worrying about interference from other parts of the code base As such expect to see them popping up in the future Read about the ShadowRealm specification here	2022-03-07 10:21:56
海外TECH	DEV Community	13 Very Profitable Business Ideas for Web Developers	https://dev.to/duomly/13-very-profitable-business-ideas-for-web-developers-539l	Very Profitable Business Ideas for Web DevelopersThis article was originally published at Are you a web developer looking for some business ideas If so then this article is perfect for you We will show you profitable businesses that are perfect for web development  There s nothing better than making money off of your skillset and these ideas will help make sure that happens Read on to find out how to start building your own successful business today If you prefer video here is the youtube version An agency that focuses only on improving web performanceSuppose your company is in the business of building and maintaining websites In that case you likely know all too well that the web landscape drastically changes every year Throughout the past few years a trend has been something known as web performance With higher and higher competitive pressures in today s evolving marketplace relying solely on consumer traffic doesn t cut it anymore Online shoppers want fast loading timesーresponses in seconds instead of minutes or hours From mobile friendly design to responsive design understanding these different trends will help you grow as a developer and company  Many of your client base might be complaining about their website speed or they may not even know what is happening out there Don t worryーthey will ask for help eventually And when they do be ready to offer your experts services in this area You ll likely see a lot of growth within your business as web performance becomes an important topic among companies that rely on e commerce sites Create blogThe web content writing niche is a profitable business idea for developers There are many ways to make money in this industry because the amount of people generating content is ever increasing The market for high quality original articles created by programmers is highly competitive Still it can be lucrative if you take the time to research your chosen topic There are three main ways of making money from your blog  Sponsored posts you can offer sponsorships through advertising on the site inviting companies to pay for their content placed within yours This is an excellent way to bring in some cash quickly Still it can be difficult to get advertisers interested if you don t have many people reading your content Affiliate marketing this is where you promote and recommend other businesses products earning an affiliate commission on all purchases made by users who follow the link from your blog This can prove very profitable once traffic has built up on your site Selling your own products this is a more long term strategy Still it can eventually generate the most earnings of all You could create eBooks or digital courses and sell them on your site for prices you determine yourself If they provide value to readers people will be happy to pay up to access them  In all cases you need to write regularly to build up a large readership and increase your chances of getting sponsorship deals or finding affiliates You also need to start building relationships with companies that can offer these services so they ll contact you when they have something suitable for you Writing is an integral part of the web development process Still it s also a profitable business idea that can provide you with income to support your development work You ll need to take the time and effort necessary to build up an audience Still if you re able enough this could be one of the most rewarding ways to make money online Software houseSoftware houses are a business idea that can be profitable The web developer will probably not worry about hiring staff in this instance The developer can either work solo or hire a team of employees and still make good money from the business idea In this case there is no need for an office facility but it will probably be needed if more than one person works on site at any given time To succeed with this type of business idea the developer should be skilled in marketing and sales because these two areas will almost always be needed Mobile apps development agencyThe business idea of creating mobile apps can also be profitable This type of business requires a lot more capital to start up properly which means it may not fit everyone who wishes to make money without huge investments However suppose the developer has a background in coding an excellent portfolio of apps that have been developed and some business acumen In that case it can be possible to make profits while working from home with this type of profitable business idea The developer will need people working for them to make money from this business idea Designers and coders are always necessary to create apps so they will have to be hired for the business idea to work out well E commerce software development companyOne type of business idea is an e commerce software development company This is an excellent company for developers who are not afraid to tackle the challenge of working with complex technical issues Once the company has been set up you will need to focus on marketing your business Individuals can sign up for your services Your job is to provide them with digital storefronts payment gateways shipping modules customer service tools inventory control applications and so on   This is a great business idea for web developers interested in providing digital services to companies that sell products The successful e commerce software developer will be comfortable learning new skills debugging code and making necessary updates This type of work can provide you with long hours but the flexibility of working from home may make it worthwhile Booking system implementation agencyBooking systems are an essential part of communication for many businesses because they make it easier to schedule appointments sell products and generate leads  Popular industries that operate with booking systems include car mechanics hairdressers and beauty salons  An agency that implements booking systems may be a good business idea because it will help companies run their business more efficiently and improve sales   Magento development agencyMagento is the platform dedicated to e commerce Almost of all businesses are powered by Magento The need for an agency specializing in Magento development can be attributed to its popularity flexibility and scalability Moreover there s no training or support offered by today s other popular vendors WooCommerce Drupal Commerce  The vast community will continue expending the limitations inherent with other platforms like WordPress or WooCommerce as their customs mature they also become less flexible  Magento will remain the developer s choice for this very reason perfect conditions today tomorrow and forever Web development mentorshipMentorship is a great business idea for web developers Learn how to make money as a web developer and make money by Teaching new developers about your skillsFinding new clients through your client baseTeaching even advanced developers of your skills if you are more experienced in the fieldYou can also open up an online mentoring service You can charge people on an hourly basis or give them one time packages So many developers are looking for help and guidance so don t ignore this business idea This is a great way to make money as a developer while helping others simultaneously   SaaS businessSaaS business is another very profitable business idea for developers When you build a SaaS application you make your program available to the public in a subscription model This means that people will pay you monthly or yearly to use your software The service is usually offered as a web application so people must access it through the internet to use it  The best part about this business idea is that when someone subscribes to use your product or service they will always need to pay if they want to continue using it So these subscriptions are essentially recurring revenue for you which can be really great    Create a great looking dashboard and sell itWhen you build and sell dashboard templates you are given the opportunity to make some money through recurring payments every month So these payments will continue as long as your customer needs some support or customization of your template system Take for example an IT company that has experienced client dashboards in one year The IT company wants per template plus of quick developer customization If they charge each client just per template it would generate K of revenue which is not bad   Create UI framework based on Bootstrap or Tailwind and sell itYou might be wondering why selling UI frameworks can be a business idea for developers Often companies look to create websites or other programs in a shorter amount of time with fewer resources  With the help of these frameworks developers can design the website s general layout or program to make it more efficient when they proceed to code So people will come to you when they need something that is not easy to create on their own  The best part about this business idea is that you don t have to worry about creating the UI framework yourself Many available open source frameworks can make your work easier For example Bootstrap has been around for a while now It continues to be one of the most popular frameworks in existence today  People will always need help designing websites and applications so this will never stop being profitable Online courseYou might think that there are better ways to make money as a developer than creating an online course However it can be one of the most profitable business ideas for developers especially if you create a course that people ask for The best thing about this idea is that it can be done quickly to start doing other things At the same time your courses are being purchased continuously    You can easily create an online course as it is just some basic HTML knowledge as a developer The best part of creating courses and selling them on your own website is getting all the money from every sale That makes it more profitable business ideas for developers If you have a unique skill that can benefit people this is definitely something to try Many platforms are available for hosting your courses such as Udemy and Coursera so there will always be someone interested in learning from you   Data visualization agencyIt is not always easy to understand what goes on in various industries Businesses are constantly trying to improve making it difficult for people to keep up with the changes  Graphs are one of the most essential tools for understanding and studying data and events worldwide Data analytics agencies can provide business owners with a clear snapshot of the trends within their field This allows them to make crucial decisions that will help keep them ahead of the competition  Building graphs will be profitable because everyone wants to see how to best present their data in a easy to understand and well designed way Graphs allow companies to understand what is happening where and what could happen in the future This business idea allows you to provide this service not for big customers Still you can also sell your skills on freelancing websites such as Upwork or Fiverr Data visualization is so important that there will always be someone who needs help Conclusion  This article has provided business ideas for web developers that are profitable The most important thing to remember is that it s necessary to have a niche If you re looking for more business ideas talk with us at Duomly  We ll help you find the best solution possible to get your project off the ground quickly while also providing continual support throughout its lifespan  To learn more about us or how we can partner together please feel free to reach out today Thanks for reading Radek from Duomly	2022-03-07 10:14:16
海外TECH	DEV Community	Web 2.0 architecture Vs Web 3.0 architecture	https://dev.to/itsrakesh/web-20-architecture-vs-web-30-architecture-2ke9	Web architecture Vs Web architectureIf you are switching from web to web or if you want to learn web then you may have doubts like how web is different from web Are there any similarities Can I directly jump into web without knowing web stuff So in this blog get answers to your questions by learning the architectures of both This blog is a high level overview of web application architecture Let s get started How web application works TerminologyLet s recall web things Three main things Frontend Frontend is what the user sees and interacts with your application Backend Backend is where we do all the business logic secrets Database Where we store all the data When we build an application combining these This is how we visualize How this works in simple terms with an example You interact with the application in the browser For example you click a login button then the browser will talk to the server then that server will talk to the database The server will query data your existing creds then the server will compare your input with queried data and returns the appropriate response whether login failed or successful That s it Simple stuff Here we have control over our user s data How web application works In web the architecture is completely different Here things are a little bit complicated There will be no centralized database and server TerminologyTwo main things Frontend Same explanation as in web Blockchain A distributed network to store data Here data is immutable means once written it can t be changed Here we don t have a centralized server so how can we query data and do all the business logic For this we write something called smart contracts Smart contracts are pieces of code we write to talk to the Ethereum blockchain Between there is Ethereum Virtual Machine EVM which executes our code How does Frontend talk to blockchain In web the client makes a request to the server and the server responds and gives back a response Here in web there is something called nodes So in order to talk to our smart contracts we need to talk to these nodes For that we can use node providers like Alchemy Infura etc or set up your own node How do we add write data in web We have to sign the transactions with a private key This is a big topic in blockchain so let s don t go too far I will cover it in upcoming blogs In simple terms if you want to add data to blockchain nodes need a signed transaction We can use Metamask to sign transactions Finally ConclusionThere are lots of buzzwords and new terms in web but this is the basic overview of what a web application architecture looks like Now answering the questions Are there any similarities There is nothing new in the front end except some dom manipulation Can I directly jump into web without knowing web stuff As you can clearly see both architectures are completely different So all you need to know from web is how the web works and how the internet works There s a lot to learn I will write more blogs on web So do follow for more Tell me if there are any mistakes	2022-03-07 10:08:08
海外TECH	DEV Community	Using Remix Ethereum IDE to deploy Smart Contract on Local Blockchain	https://dev.to/surajondev/using-remix-ethereum-ide-to-deploy-smart-contract-on-local-blockchain-igg	Using Remix Ethereum IDE to deploy Smart Contract on Local Blockchain IntroductionSmart Contracts are the backbone of the web You need to have smart contracts to make a dApp Deploying a smart contract directly on the mainnet is not ideal You need to test the smart contracts on the local blockchain development network first Remix IDE lets you write smart contracts online They have a compiler to check for errors They offer a wide variety of deployment options You can deploy it on Javascript based Virtual Machine Injected Web for MetaMask and local blockchain network We are going to look into writing compiling and deploying smart contracts on the local blockchain network So let s get started Local Blockchain Development NetworkBefore start writing our smart contract on Remix IDE we need a local blockchain network Local blockchain networks are those that simulate a development blockchain network It is not ideal to deploy smart contracts directly to the main network Also the test network is not fast enough For development purposes a local blockchain environment is useful to test Ethereum based contracts We are going to use the ganache tool to create a local blockchain network There are two versions of it terminal based and GUI based Use it according to you Download GanacheOfficial Docs GanacheI have used the GUI version After installing start a workspace Remix IDEAfter visiting the Remix IDE site You have a panel on the left side On top left side you have three tabs Explorer Compiler and Deployment Writing Smart ContractIn the explorer tab you have folders contracts scripts and tests and a readme file Click on the contracts folder There are a few examples of smart contracts Create a new file with any name with the sol extension This is not a solidity tutorial that s why I am giving you the code You can learn solidity with Solidity Tutorial A Full Course on Ethereum Blockchain Development Smart Contracts and the EVM SPDX License Identifier GPL pragma solidity gt lt contract Storage string number function store string memory num public number num function retrieve public view returns string memory return number Solidity CompilerAfter writing the solidity code move to the compiler tab In the compiler you can choose the version of the solidity for compiling Just click on the compile button for the smart contracts If there will be an error solve those and run them again DeploymentAfter a successful compiling move on to the DEPLOY amp RUN TRANSACTIONS tab In the tab you have various fields such as ENVIRONMENT ACCOUNT GAS LIMIT CONTRACT and others Under the ENVIRONMENT you have various networks for the deployment of the smart contract Select the Web Provider It will ask you for an endpoint For Ganache GUI it s Make sure the local network is running If you are using other check the documentation for it After entering the right endpoint You can change your account from the ACCOUNT Now just click on the Deploy button to deploy the smart contract on the selected network Under the Deployed Contracts section you can interact with the deployed contacts ConclusionRemix Ethereum IDE is best to learn practice and deploy solidity based smart contracts I am recommending you to smart practice the smart contract on it I hope this article has helped you I would love it if you share this with others Thank you for reading the article Weekly Newsletter of SurajOnDev What you will get Read of the Week best articles hand picked by myself from different platforms This article will be developer self growth and productivity oriented Tool of the Week A resource or tool link that will help in easing your work Our latest blog post Latest blog post from SurajOnDev that is me Free eBook and Resources Occasionally you will get free eBook that are by developers and for developers Frequency WeeklySubscribe Here Weekly Newsletter of SurajOnDev	2022-03-07 10:07:08
海外TECH	DEV Community	Tutorial - Responsive Registration Form In HTML & CSS 😍	https://dev.to/rammcodes/tutorial-responsive-registration-form-in-html-css-54fk	Tutorial Responsive Registration Form In HTML amp CSS In my latest Youtube Video We are building a Beautiful Registration Form using just pure HTML amp CSS Make sure to Like the Youtube Video amp Subscribe to my Youtube Channel for more Amazing content related to Web Development and Self Taught Developer Journey I have also provided the Source Code Link in the video description on Youtube for your reference Please do me a favour by Reacting to this post with ️ and also bookmark it for your future reference Connect Follow me on Social platforms like Twitter Linkedin where I regularly post Tips Guides Resources related to Web Development and Programming ‍ My Twitter ‍My Linkedin My WebsitePress the Follow button to stay updated with my content Thanks for your Support ️	2022-03-07 10:04:20
Apple	AppleInsider - Frontpage News	'CODA' star Troy Kotsur wins at Film Independent Sprit Awards	https://appleinsider.com/articles/22/03/07/coda-star-troy-kotsur-wins-at-film-independent-sprit-awards?utm_medium=rss	x CODA x star Troy Kotsur wins at Film Independent Sprit AwardsApple TV hit film CODA has won another award with actor Troy Kotsur taking the supporting actor trophy at this year s Film Independent Spirit Awards Emilia Jones and Troy Kotsur in CODA Following his win at the SAG awards the Gotham awards and his Oscar nomination Troy Kotsur won for Best Supporting Male at a ceremony honouring independent filmakers Read more	2022-03-07 10:25:50
海外TECH	Engadget	Nintendo's Mario Kart Live: Home Circuit sets are just $60 at Amazon	https://www.engadget.com/nintendo-mario-kart-live-home-circuit-amazon-deal-105528591.html?src=rss	Nintendo x s Mario Kart Live Home Circuit sets are just at AmazonIf the announcement of additional Mario Kart courses has you itching for some real life Nintendo racing a new deal at Amazon might be right up your street Right now both the Mario and LuigiMario Kart Live Home Circuit sets are down to from a percent savings giving you the ability to create and zoom around custom racetracks using Switch controllers in your own home While not all time lows they re still some of the best deals we ve seen at the retailer Buy Mario Kart Live Home Circuit Mario Set at Amazon Buy Mario Kart Live Home Circuit Luigi Set at Amazon Both Home Circuit sets provide gates that you can place around a room to create a racetrack plus a camera equipped kart that is piloted by Mario or Luigi Each set only offers one car which can be used in single player mode so you ll need more than one set if you fancy some multiplayer action Courses typically require around a x foot area ーbut once the track is set you can use the Joy Cons of your Switch to control your racer Tracks can be moved and the game will make things interesting by setting racers in different worlds including tricky underwater and bit areas Like in Mario Kart in game items will speed up or slow down your kart meaning no two races are the same nbsp Follow EngadgetDeals on Twitter for the latest tech deals and buying advice	2022-03-07 10:55:28
金融	ニュース - 保険市場TIMES	あいおいニッセイ同和損保、AIを活用した通話分類・自動要約システムの実証実験開始	https://www.hokende.com/news/blog/entry/2022/03/07/200000	あいおいニッセイ同和損保、AIを活用した通話分類・自動要約システムの実証実験開始コンタクトセンター業務の自動化へあいおいニッセイ同和損保は月日、ユニフォア・テクノロジーズ・ジャパンと、コンタクトセンター業務の自動化に関する実証実験を月から実施すると発表した。	2022-03-07 20:00:00
ニュース	BBC News - Home	Ukraine conflict: Shares slide as oil and gas prices soar	https://www.bbc.co.uk/news/business-60642786?at_medium=RSS&at_campaign=KARANGA	bills	2022-03-07 10:54:03
ニュース	BBC News - Home	Ukraine war: PM to hold talks with world leaders on further sanctions	https://www.bbc.co.uk/news/uk-60642926?at_medium=RSS&at_campaign=KARANGA	policy	2022-03-07 10:53:57
ニュース	BBC News - Home	One dead after Scottish trawler capsizes off Norway	https://www.bbc.co.uk/news/uk-scotland-60645898?at_medium=RSS&at_campaign=KARANGA	njord	2022-03-07 10:38:31
ニュース	BBC News - Home	How many refugees have fled Ukraine and where are they going?	https://www.bbc.co.uk/news/world-60555472?at_medium=RSS&at_campaign=KARANGA	ukraine	2022-03-07 10:04:55
ニュース	BBC News - Home	Ukraine: Irish medical student 'blocking out dangers' in Sumy	https://www.bbc.co.uk/news/world-europe-60638895?at_medium=RSS&at_campaign=KARANGA	russian	2022-03-07 10:30:54
GCP	Google Cloud Platform Japan 公式ブログ	Maps SDK for Android 用 Compose を提供開始	https://cloud.google.com/blog/ja/products/maps-platform/compose-maps-sdk-android-now-available/	Composeを初めて使用する場合、コンポーズ可能な関数は基本的に、Composeで構築されたアプリケーションのUIビルディングブロックとなります。	2022-03-07 11:00:00
北海道	北海道新聞	キャンピングカー貸し出しに樽商大生アイデア　小樽のレンタサイクル店、４月新事業	https://www.hokkaido-np.co.jp/article/653935/	小樽市稲穂	2022-03-07 19:12:31
北海道	北海道新聞	十勝で進化するサウナ文化　回転する氷上で、牧草地を眺めて…	https://www.hokkaido-np.co.jp/article/653938/	進化	2022-03-07 19:11:44
北海道	北海道新聞	白老の漁師姉弟営む直売店が人気　当日水揚げされた旬の魚を販売	https://www.hokkaido-np.co.jp/article/653949/	販売	2022-03-07 19:10:25
北海道	北海道新聞	「元祖小いけ」のカレー、七飯の自動車販売会社が製造　レトルトや缶詰を商品化	https://www.hokkaido-np.co.jp/article/653953/	自動車販売	2022-03-07 19:09:35
北海道	北海道新聞	米欧制裁強化、ロシア原油禁輸も　相場は最高値視野、経済影響懸念	https://www.hokkaido-np.co.jp/article/653962/	視野	2022-03-07 19:03:00
北海道	北海道新聞	生活保護訴訟で請求棄却　秋田地裁、全国８件目	https://www.hokkaido-np.co.jp/article/653960/	引き下げ	2022-03-07 19:01:00
IT	週刊アスキー	3月15日発売のPS5とXSX|S『GTA V』と『GTAオンライン』の新着情報を公開！	https://weekly.ascii.jp/elem/000/004/085/4085454/	playstation	2022-03-07 19:20:00
マーケティング	AdverTimes	電通、女性の課題を可視化　コンサルや商品開発につなぐ	https://www.advertimes.com/20220307/article378623/	商品開発	2022-03-07 10:05:24
GCP	Cloud Blog JA	Maps SDK for Android 用 Compose を提供開始	https://cloud.google.com/blog/ja/products/maps-platform/compose-maps-sdk-android-now-available/	Composeを初めて使用する場合、コンポーズ可能な関数は基本的に、Composeで構築されたアプリケーションのUIビルディングブロックとなります。	2022-03-07 11:00:00