投稿時間:2022-04-29 20:19:53 RSSフィード2022-04-29 20:00 分まとめ(20件)

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IT	ITmedia 総合記事一覧	[ITmedia News] NHK BSの「伝説のコンサート」で中森明菜スペシャル、30日放送　1989年のライブ映像を4Kリマスターで	https://www.itmedia.co.jp/news/articles/2204/29/news074.html	itmedianewsnhkbs	2022-04-29 19:33:00
AWS	AWSタグが付けられた新着投稿 - Qiita	S3 Glacier Deep Archive に写真を格安で保存しよう！(アップロード編)	https://qiita.com/taku-y-9308/items/6294b7198c72fb98768e	sglacierdeeparchive	2022-04-29 19:32:26
AWS	AWSタグが付けられた新着投稿 - Qiita	S3 Glacier Deep Archive に写真を格安で保存しよう！(料金編)	https://qiita.com/taku-y-9308/items/93c8dc5c8f86f9563acf	sglacierdeeparchive	2022-04-29 19:29:10
技術ブログ	Developers.IO	การทดลองใช้ Amazon Aurora Serverless v2 ในรีเจี้ยน Singapore	https://dev.classmethod.jp/articles/trial-amazon-aurora-serverless-v2/	การทดลองใช้Amazon Aurora Serverless v ในรีเจี้ยนSingaporeได้ทำการทดลองใช้Aurora Serverless v ในรีเจี้ยนTokyo ที่ได้เผยแพร่ในวันที่ เมษายน Amazon Aurora Serv	2022-04-29 10:34:14
技術ブログ	Developers.IO	GolangのLambda関数の実行環境OSをAmazon LinuxからAmazon Linux 2に移行する(Terraform版)	https://dev.classmethod.jp/articles/migrating-golang-lambda-functions-to-al2/	amazon	2022-04-29 10:06:25
海外TECH	MakeUseOf	Why EU's Interoperability Requirement Threatens Encryption Security	https://www.makeuseof.com/why-interoperability-threatens-encryption-security/	Why EU x s Interoperability Requirement Threatens Encryption SecurityEU s interoperability requirement for messaging apps could potentially weaken the end to end encryption you enjoy on top platforms	2022-04-29 10:20:13
海外TECH	MakeUseOf	OTF vs. TTF Fonts: Which Is Better? What's the Difference?	https://www.makeuseof.com/tag/otf-vs-ttf-fonts-one-better/	difference	2022-04-29 10:10:13
海外TECH	DEV Community	A Simple Introduction To Java - Object Oriented Programming - Part 1	https://dev.to/otumianempire/a-simple-introduction-to-java-object-oriented-programming-part-1-60k	A Simple Introduction To Java Object Oriented Programming Part In this session we will discuss Shape class Encapsulation Package ConclusionWe have already looked at how to create functions or methods and also how to create classes You should refer to A Simple Introduction To Java Class and Method Otu Michael・Mar ・ min read java programming beginners codenewbie Shape ClassThe purpose of creating the Shape class is to demonstrate the use of the this keyword in java The this keyword refers to the instance of the class and we can use it with the operator to access the properties fields and methods of the class anywhere in the said class Create a class Shape Let the Shape class have the following attributes and methods length double breadth double area double perimeter doubleThe methods have the The above ADT tells us that the class has two fields and two methods the types and return types It doesn t tell us how the methods are implemented Try an implement the Shape class public class Shape double length double breadth public Shape double length double breadth length length breadth breadth public double area return length breadth public double perimeter return length breadth What do you notice when you execute the Shape class Main javapublic class Main public static void main String args Shape s new Shape System out println Area s area System out println Perimeter s perimeter It will appear that the output will become Area Perimeter But why the s This was because of our constructor If you remember so far all our constructors have different names compared to the fields Replace the constructor with the snippet below public Shape double l double b length l breadth b Now the output looks more correct and as expected just like the result below Area Perimeter Using different variable names was another way to solve the previous issue we had where all the outputs were We could have used the this keyword Change the constructor to the snippet below public Shape double length double breadth this length length this breadth breadth The output will be the same as the above Using the same parameter names as the field names make our code to some degree self documenting What would l and b mean anyway We can use the this keyword on the rest of the fields called in the area and parameter methods too We should add void methods to print the area and perimeter with some text informing the user or displaying the length and breadth of the shape Let s call this method print Our new Shape ADT will be length double breadth double area double perimeter double print voidNow our new class will look like the snippet below public class Shape double length double breadth public Shape double length double breadth this length length this breadth breadth public double area return this length this breadth public double perimeter return this length this breadth public void print System out println The shape has a length and a breadth of this length and this breadth System out println Shape has an Area of this area squared units System out println Shape has a Perimeter of this perimeter units Our little output will be The shape has a length and a breadth of and Shape has an Area of squared units Shape has a Perimeter of units EncapsulationIn java there are four main concepts that we have to understand about Object Oriented Programming These are Encapsulation Inheritance Polymorphism and Abstraction We d discuss Encapsulation here and discuss the other three in a separate article So what is Encapsulation Do you remember what we discussed about access modifiers We said access modifiers regulate access to class methods and variables There are public protected private and default The private access modifier restricts the access to methods or variables declared as private outside the class The concept of Encapsulation revolves around the private access modifier and how to resolve the problems that arise when the private access modifier is used We can prevent the user of our class from directly accessing and modifying the state of the objects they create This is done to hide implementation details from the user We provide the user of our class with some public methods to access the variables and or methods that we have declared private If we consider the Shape class the length and breadth have no access modifiers Well they do it s just that we didn t specify it So it is by default default What this means is that the fields can be accessed by another class in the same package as the Shape class Getters and SettersI mentioned earlier that we can hide implementation details by declaring some fields or methods private than allowing indirect access to these fields and methods via some public methods These methods are known as getters and setters Let s experiment Make the fields in the Shape class private and in the Main class comment out s print and do System out println s length What happened Well on my side I am using vscode and before I even completed the whole print statement a red squiggly line appear below the print statement Saying The field Shape length is not visible In vscode neither length nor breadth showed up on the IntelliSense Now we know that when we make a field private the field will be inaccessible outside the class Now let s talk about getters and setters what they are and how to use them We made the length and breadth fields private which means we can not access them nor write them We can not read their value nor can we reassign or update their value With a public getter method we can return the said private field So if the return type of length is int the getter will return an int value which is the private field A setter is a public method with no return type Its return type is void We use a setter to set a value for a private field Something like assigning a private field a new value via some method So the setter method will take the value as an argument and reassign the private field with the passed argument The getter method looks like the snippet below public type getPrivateField return this privateField type is just the data type The getter method name starts with get which indicates that it is a getter method The remaining part is mostly the name of the private field The goes for the setter method but in place of get we use set The setter method looks like the snippet below public void setPrivateField type someValue this privateField someValue Know that the type of someValue and the said private field must have the same type With this new information update the Shape class using getters and setter This is what my Shape class now looks like after the new changes public class Shape private double length private double breadth public Shape double length double breadth this length length this breadth breadth public double getBreadth return breadth public void setBreadth double breadth this breadth breadth public double getLength return length public void setLength double length this length length public double area return this length this breadth public double perimeter return this length this breadth public void print System out println The shape has a length and a breadth of this length and this breadth System out println Shape has an Area of this area squared units System out println Shape has a Perimeter of this perimeter units Now in the Main class instead of System out println s length we can now do System out println s getLength What do you think about getters and setters Well what I noticed is that if I don t need direct access to the fields I don t need getters and setters In the Main class if we have nothing to do with the fields then we don t need getters and setters Apart from setting the fields using the constructors there hasn t been anywhere the fields were set so we can do away with the setters Know when to use the getters and setters The basic knowledge here is restricting access Have a look at the print method in the Shape class public void print System out println The shape has a length and a breadth of this length and this breadth System out println Shape has an Area of this area squared units System out println Shape has a Perimeter of this perimeter units We can comment out the print method and put its body in the Main class where we placed System out println s getLength We would have to change this to s and then use the getters in place of the fields Mine Main class now looks like this public class Main public static void main String args Shape s new Shape s print System out println The shape has a length and a breadth of s getLength and s getBreadth System out println Shape has an Area of s area squared units System out println Shape has a Perimeter of s perimeter units And the output I got was The shape has a length and a breadth of and Shape has an Area of squared units Shape has a Perimeter of units Note that it is advised to let a class do one thing This was why I said we should come out of the print method Even though we create the getters and setter for external use we can also use them internally In the constructor instead of assigning a private field a value by assignment use the setter In the perimeter and area methods use the getters PackageYou may have heard of the term Package at least once in your life as a human I mean as a java programmer you d be dealing with packages a lot So take what you know and translate that thought to java Do you know java has a Math class What about we create our own Math class without the names of the classes conflicting How do we do that We use a package A package is just a folder For our case as starters the package just sits right in our root directory There are some benefits to using packages which include we can group related classes which will make it easier to debug and maintain the codebase this prevents the pollution of namespaces no name will class with another by default packages restrict the access of class to outsiders but are open to the classes in the said package Create MyMath PackageTo create a package all we have to do is create a folder and then create our classes in that folder Let s create a folder MyMath in the root of project files Now inside MyMath folder create a java class MathNow at the very top before the class header put package MyMath This indicates that Math class is a file in the MyMath package My Math class looks like this package MyMath public class Math Let s add two methods addOne int num int and incBy int num int val int So as the method name suggests about their implementation the addOne method takes an int argument and adds one to it then returns the result incBy takes two arguments num and val It adds val to num and returns the result Since all the methods in the Math class static methods let s make ours also static package MyMath public class Math public static int addOne int num return num public static int incBy int num int val return num val In the Main class let s clear the main method s body Now to use the new package we have created we have to import it in the Main class as import MyMath Math So our Main class will now look like this import MyMath Math public class Main public static void main String args System out println Math addOne System out println Math incBy There is a problem here We can use our Math class freely now but what about the java Math class Of course we can use the java Math class anywhere but we can not do that in our Math class It is for reasons like that we use packages I used the pascal case for my package name the recommended approach is to have a root folder then in the root folder you d have your package folder then your classes so you d import it as import root package ClassName Note the use of the lower case for the root and package names This is similar to import java util Scanner Conclusion OOP is a programming paradigm where classes are used to model real life objects There are four main concepts of OOP Encapsulation Inheritance Polymorphism and Abstraction Encapsulation means data hiding making use of the private keyword which restricts access to fields or and methods declared as private We make use of getters and setters to make private fields or and methods available to classes outside the said class We can use packages to group related classes and this prevents namespace pollution ProjectsThe projects here will be simple not easier We would implement the back account program using the knowledge we ve acquired so far A bank account has an account name account number and pin One can deposit and redraw from one s bank account One can check their balance After a withdrawal or a deposit display a message saying how much the account owner previously had before the transaction was made the amount used in the transaction and what their new balance is We can not have a balance less than zero and we can not deposit nor withdraw a negative amount from the balance Make the program interactive by asking the user to input their account name number and pin when the program is first executed Assign the user an initial balance of Provide an interactive means for the user to deposit withdraw or exit the program TIPS Have a different class for the bank account and another for the interactivity the main class will also do Use integers for the amounts If you think you can add some functionality that is not mentioned do so Source Sololearn DS MalikTop	2022-04-29 10:01:29
Apple	AppleInsider - Frontpage News	Snapchat launches selfie drone Pixy	https://appleinsider.com/articles/22/04/29/snapchat-launches-selfie-drone-pixy?utm_medium=rss	Snapchat launches selfie drone PixySnap the company behind Snapchat social media has unveiled a drone named Pixy which is specifically made for taking selfies Snapchat which has recently backed Apple over its App Store pricing launched Pixy at its Snap Partner Summit The drone was revealed in a session about Snap s latest tools for creators Level up your Snaps grow your audience and get cash for your creativity with the latest features for creators on Snapchat said the company on its summit website Plus meet Pixy ーthe latest way to take your creativity to new heights Read more	2022-04-29 10:43:30
Apple	AppleInsider - Frontpage News	Apple teases second season of hit thriller 'Slow Horses'	https://appleinsider.com/articles/22/04/29/apple-teases-second-season-of-hit-thriller-slow-horses?utm_medium=rss	Apple teases second season of hit thriller x Slow Horses x The finale of Apple TV drama Slow Horses includes a sneak peak at the second season plus new cast have been revealed Gary Oldman in Slow Horses The last episode of the critically acclaimed six part spy thriller Slow Horses from See Saw Films and based on Mick Herron s novel is now streaming on Apple TV While Apple has not officially announced a second run the episode concludes with a teaser for what will follow Read more	2022-04-29 10:25:46
海外TECH	Engadget	F1 returns to 'Rocket League' with 2022 Fan Pass	https://www.engadget.com/rocket-league-2022-f1-fan-pass-105522432.html?src=rss	F returns to x Rocket League x with Fan PassPsyonix is announcing an updated Rocket League Formula One Fan Pack for giving players a way to unify their passions of cars bumping into one another to score points and…also that Much like last year s offering you ll get a freshly updated F car model new audio and Pirelli branded Wheels You ll also be able to deck your ride out in the livery of Alfa Romeo AlphaTauri Ferrari McLaren McLaren Miami and AlphaTauri s farm team Red Bull nbsp The car model will be based on Rocket League sDominus Hitbox the same one that s used to underpin many of its crossover models Between May th and May th to coincide with the Miami GP players can drop down credits to get the Fan Pack and those who buy now will get two additional updates through the rest of the season thrown in for free That includes decals for Mercedes Haas Williams Aston Martin and Alpine while the fall update will include different color variants for the Pirelli wheels	2022-04-29 10:55:22
海外TECH	Engadget	Noom is reportedly laying off up to a quarter of its wellness coaches	https://www.engadget.com/noom-reported-layoffs-101346556.html?src=rss	Noom is reportedly laying off up to a quarter of its wellness coachesInsider is reporting that infamous weight loss app Noom is laying off a significant number of its coaches as it shifts its strategy The company which presently enables users to engage in text chat with experts will reportedly shift to a system of scheduled video calling reducing the need for so many workers Internal documents suggest that the people who remain will see higher workloads to cover for the departures coaches are believed to have already been let go with a further due to join them in the coming days Individuals who take voluntary severance can expect eight weeks pay although the site says that Noom will not cover the cost of unused vacation days Noom which garnered million in fresh venture funding in saw its business surge as a consequence of the pandemic TechCrunch reported that the platform had earned million in profit across as users flocked to its promised mix of live coaching and CBT inspired practices Its critics however believe that Noom s unique spin on weight loss is nothing more than a standard heavily restrictive diet packaged in the language of wellness In Noom branched out into mental health coaching under the banner Noom Mood As FastCompany outlined last year Noom s key metric is calorie restriction tasking men to limit their intake to around calories per day There s a lot of debate about the proper calorie limit for weight loss but that figure is seen as problematically low and well below what the CDC recommends Last year an Outside investigation found that Noom was not tailoring its recommendations to the age height and weight of its users instead issuing a stock limit for the majority of participants That same investigation found that there is little pre screening for people who may have lived with disordered eating beforehand Casey Johnston who writes She s A Beast has also called into question Noom s advertising practices potentially misleading customers as to its effectiveness nbsp	2022-04-29 10:13:46
ニュース	BBC News - Home	James Corden leaving Late Late Show after eight years	https://www.bbc.co.uk/news/entertainment-arts-61267036?at_medium=RSS&at_campaign=KARANGA	british	2022-04-29 10:44:50
ニュース	BBC News - Home	House prices up 12% but rises expected to slow, says Nationwide	https://www.bbc.co.uk/news/business-61270686?at_medium=RSS&at_campaign=KARANGA	nationwide	2022-04-29 10:40:53
ニュース	BBC News - Home	Amazon reports loss as online sales falter	https://www.bbc.co.uk/news/business-61264509?at_medium=RSS&at_campaign=KARANGA	apple	2022-04-29 10:47:37
ニュース	BBC News - Home	Shanghai lockdown: Residents protest after five weeks of strict zero-Covid measures	https://www.bbc.co.uk/news/world-asia-china-61270616?at_medium=RSS&at_campaign=KARANGA	access	2022-04-29 10:22:33
ビジネス	ダイヤモンド・オンライン - 新着記事	アマゾンにインフレの壁、物流網整備は裏目に - WSJ発	https://diamond.jp/articles/-/302690	裏目	2022-04-29 19:17:00
北海道	北海道新聞	日本ハム、ロッテ戦は雨天中止	https://www.hokkaido-np.co.jp/article/675836/	日本ハム	2022-04-29 19:11:00
北海道	北海道新聞	２０歳の斉藤立、初の親子日本一　柔道、史上３番目の若さ	https://www.hokkaido-np.co.jp/article/675835/	全日本選手権	2022-04-29 19:11:00
北海道	北海道新聞	「節度ある取材」申し合わせ　知床の観光船事故で在道２４社	https://www.hokkaido-np.co.jp/article/675834/	報道機関	2022-04-29 19:11:00