投稿時間:2022-02-27 00:23:52 RSSフィード2022-02-27 00:00 分まとめ(32件)

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python	Pythonタグが付けられた新着投稿 - Qiita	oTree実験プログラムを作る編	https://qiita.com/eco-tree/items/059c0e76e5a3c0e87293	ここでのポイントは、実験で使用する「独自の変数」をclassCBaseConstantsに定義することです。	2022-02-26 23:24:24
Ruby	Rubyタグが付けられた新着投稿 - Qiita	【Rails】nil? empty? blank? present? exists?メソッドについて【Ruby】	https://qiita.com/P-man_Brown/items/072911aff4d1bdf11122	そのためnilの判定に使用することはできません。	2022-02-26 23:06:09
AWS	AWSタグが付けられた新着投稿 - Qiita	AWS Amplify CLIのインストール時にエラッた件	https://qiita.com/hiro_pppp/items/20055d3f64dec380fa6c	AWSAmplifyCLIのインストール時にエラッた件はじめにAWSが公開しているチュートリアルであるAWSAmplifyを利用したReactアプリケーションの構築を進めていたところ、つまずいた点がありましたのでその解決までをまとました。	2022-02-26 23:44:25
golang	Goタグが付けられた新着投稿 - Qiita	Goでヒストグラムを描いてみた	https://qiita.com/wattak777/items/a7a1c1ec358413fcb2aa	プロット、画面表示向けのマトリクスを取得する関数を分けて作ってみました。	2022-02-26 23:43:09
Ruby	Railsタグが付けられた新着投稿 - Qiita	【Rails】nil? empty? blank? present? exists?メソッドについて【Ruby】	https://qiita.com/P-man_Brown/items/072911aff4d1bdf11122	そのためnilの判定に使用することはできません。	2022-02-26 23:06:09
技術ブログ	Developers.IO	[AWS CDK] Lambda@Edge関数とCloudFront Distributionのリソースは別スタックに分けた方が良さそう	https://dev.classmethod.jp/articles/it-seems-better-to-divide-lambda-edgecloudfront-distribution-resources-into-separate-stacks/	検証結果	2022-02-26 14:53:34
技術ブログ	Developers.IO	53calのサービス終了告知に伴ってゴミ出し告知の代替ソリューションを色々考えてみた	https://dev.classmethod.jp/articles/think-alternative-solution-about-53cal-garbage-disposal/	caljp	2022-02-26 14:38:14
海外TECH	MakeUseOf	How to Install YouTube Music on Your PC From the Browser	https://www.makeuseof.com/install-youtube-music-on-pc/	browseryoutube	2022-02-26 15:00:14
海外TECH	MakeUseOf	How Much Does It Cost to Fix a Phone Screen?	https://www.makeuseof.com/cost-to-fix-phone-screen/	needn	2022-02-26 15:00:13
海外TECH	MakeUseOf	The 5 Best Tools to Manage Poor Performance in Your Remote Workplace	https://www.makeuseof.com/best-tools-manage-poor-performance-remote-work/	The Best Tools to Manage Poor Performance in Your Remote WorkplaceIf you are struggling with underperforming employees in your remote workplace you need to address the underlying cause Here are some tools to help	2022-02-26 14:46:13
海外TECH	MakeUseOf	How to Make a Basic Gantt Chart in Excel	https://www.makeuseof.com/make-gantt-chart-excel/	project	2022-02-26 14:30:13
海外TECH	DEV Community	Learn C with me! C in one blog	https://dev.to/dumboprogrammer/learn-c-with-me-c-in-one-blog-3gj8	Learn C with me C in one blogC is the mother of all languages but for beginners C is very hard to learn I already use c and bash on a daily basis because I use linux Today I will teach you how to code in C You can grab the cheatsheet from herevariables variable is a container that stores a value Rules for naming a variable in c First character should be an underscore or a letter No commas or space allowed names are case sensitive no other special character rather than int myNum Integer whole number float myFloatNum Floating point numberchar myLetter D CharacterIf a variable value can t be changed it is calleda constant Types of constants Integer constants Real constants character constant If there is something reserved builtin a language it is called a keyword Various keywords have various uses Keywords auto else long switchbreak enum register typedefcase extern return unionchar float short unsignedconst for signed voidcontinue goto sizeof volatiledefault if static whiledo int struct Packeddouble Header files A header file is afile that has a h extension These preprocessor directives are used for instructing compiler that these files need to be processed before compilation the stdio we imported at start is a header file It means standard input output Return Code we return a code with the status of the compilation in C exit It indicates abnormal termination of a program perhaps as a result a minor problem in the code exit It is similar to exit but is displayed when the error occurred is a major one This statement is rarely seen exit It indicates command not found exit It indicates that a program was aborted received SIGILL perhaps as a result of illegal instruction or that the binary is probably corrupt exit It indicates that a program was aborted received SIGTRAP perhaps as a result of dividing an integer by zero exit It indicates that a program was aborted received SIGABRT perhaps as a result of a failed assertion exit It indicates that a program was aborted received SIGFPE perhaps as a result of floating point exception or integer overflow exit It indicates that a program took up too much memory exit It indicates that a program was aborted received SIGBUS perhaps as a result of unaligned memory access exit It indicates Segmentation Fault which means that the program was trying to access a memory location not allocated to it This mostly occurs while using pointers or trying to access an out of bounds array index exit It indicates that a program was aborted received SIGXCPU perhaps as a result of CPU time limit exceeded exit It indicates that a program was aborted received SIGXFSZ perhaps as a result of File size limit exceeded Print a value The printf function is used to output values print text include int main printf Hello World n printf I am learning C return Comments Single line comments start with two forward slashes Any text between and the end of the line is ignored by the compiler will not be executed Multi line comments start with and ends with Specifiers if we try to print a variable name it will give use error unless we use specifers ex printf d n Afloat d or i int f floats lf double c characters s stringOperator Operators are used to perform operations on variables and values Arithmetic Addition substraction multiplication Division Modulus increment DecrementAssignment x x x x x x x x x x x x x x x x x amp x amp x x amp x x x x x x gt gt x gt gt x x gt gt lt lt x lt lt x x lt lt Condition C has the following conditional statements Use if to specify a block of code to be executed if a specified condition is trueUse else to specify a block of code to be executed if the same condition is falseUse else if to specify a new condition to test if the first condition is falseUse switch to specify many alternative blocks of code to be executedThe if StatementUse the if statement to specify a block of C code to be executed if a condition is true Note that if is in lowercase letters Uppercase letters If or IF will generate an error Short Hand If Else Ternary Operator There is also a short hand if else which is known as the ternary operator because it consists of three operands It can be used to replace multiple lines of code with a single line It is often used to replace simple if else statements int time time lt printf Good day printf Good evening Instead of writing many if else statements you can use the switch statement The switch statement selects one of many code blocks to be executed switch expression case x code block break case y code block break default code block The break KeywordWhen C reaches a break keyword it breaks out of the switch block This will stop the execution of more code and case testing inside the block When a match is found and the job is done it s time for a break There is no need for more testing The default KeywordThe default keyword specifies some code to run if there is no case match Loops Loops can execute a block of code as long as a specified condition is reached Loops are handy because they save time reduce errors and they make code more readable while loopwhile condition code block to be executed for loopfor int i i lt i if i break printf d n i do while loopdo code block to be executed while condition Arrays Arrays are used to store multiple values in a single variable instead of declaring separate variables for each value To create an array define the data type like int and specify the name of the array followed by square brackets To insert values to it use a comma separated list inside curly braces int myNumbers Change an Array ElementTo change the value of a specific element refer to the index number myNumbers Loop Through an ArrayYou can loop through the array elements with the for loop The following example outputs all elements in the myNumbers array Exampleint myNumbers int i for i i lt i printf d n myNumbers i Set Array SizeAnother common way to create arrays is to specify the size of the array and add elements later Example Declare an array of four integers int myNumbers Add elementsmyNumbers myNumbers myNumbers myNumbers Strings Strings are used for storing text characters For example Hello World is a string of characters Unlike many other programming languages C does not have a String type to easily create string variables However you can use the char type and create an array of characters to make a string in C char greetings Hello World User Input You have already learned that printf is used to output values in C To get user input you can use the scanf function ExampleOutput a number entered by the user Create an integer variable that will store the number we get from the userint myNum Ask the user to type a numberprintf Type a number n Get and save the number the user typesscanf d amp myNum Output the number the user typedprintf Your number is d myNum Memory Address When a variable is created in C a memory address is assigned to the variable The memory address is the location of where the variable is stored on the computer When we assign a value to the variable it is stored in this memory address To access it use the reference operator amp and the result will represent where the variable is stored Example int myAge printf p amp myAge Outputs xffeePointer A pointer is a variable that stores the memory address of another variable as its value A pointer variable points to a data type like int of the same type and is created with the operator The address of the variable you re working with is assigned to the pointer Exampleint myAge An int variableint ptr amp myAge A pointer variable with the name ptr that stores the address of myAge Output the value of myAge printf d n myAge Output the memory address of myAge xffee printf p n amp myAge Output the memory address of myAge with the pointer xffee printf p n ptr Functions For example main is a function which is used to execute code and printf is a function used to output print text to the screen Create a FunctionTo create often referred to as declare your own function specify the name of the function followed by parentheses and curly brackets void myFunction code to be executed Call a FunctionDeclared functions are not executed immediately They are saved for later use and will be executed when they are called To call a function write the function s name followed by two parentheses and a semicolon In the following example myFunction is used to print a text the action when it is called Create a functionvoid myFunction printf I just got executed int main myFunction call the function return Outputs I just got executed Math Functions There is also a list of math functions available that allows you to perform mathematical tasks on numbers To use them you must include the math h header file in your program include Square rootprintf f sqrt	2022-02-26 14:54:41
海外TECH	DEV Community	Basic Kafka terminology	https://dev.to/ahmedgulabkhan/basic-kafka-terminology-43e6	Basic Kafka terminologyIn this blog post I ll be giving a brief and basic introduction regarding Apache Kafka and the terminology that would be necessary to know in order to get started with Kafka You can check out the full article here Kafka ーWhat is it In a nutshell Kafka is a distributed system that allows multiple services to communicate with each other via its queue based architecture With that out of the way let s get to know about some basic Kafka terminology Let s get started Broker A Broker is a server which has Kafka running on it and is responsible for the communication between multiple services Multiple brokers would form a Kafka cluster Event The messages that are produced to or consumed from the Kafka broker are called events These messages are stored in the form of bytes in the broker s disk storage Producer and Consumer The services that produce these events to Kafka broker are referred to as Producers and those which consume these events are referred to as Consumers It could also be possible that the same service can both produce and consume messages from Kafka Topic In order to differentiate the type of events stored in Kafka topics are used In short a topic is like a folder in a file system where only events or messages related to a specific type are stored For example “payment details “user details etc Partition A topic can be further divided into partitions in order to attain higher throughput It is the smallest storage unit which holds a subset of data of a topic Replication Factor A replica of a partition is a backup of that partition The replication factor of a topic decides how many replicas of a partition in that topic should be maintained by the Kafka cluster A topic with partition as and replication factor as would mean that two copies of the same partition with same data would be stored in the Kafka cluster Offset To keep a track of which events have already been consumed by the consumer an index pointing to the latest consumed message is stored inside Kafka this index is called the offset and helps keep a track of which events have already been consumed by the consumer So if a consumer were to go down this offset value would help us know exactly from where the consumer has to start consuming events A producer producing messages to a kafka topic with partitions would look like this Zookeeper Zookeeper is an extra service present in the Kafka cluster that helps maintain the cluster ACLs stores the offsets for all the partitions of all the topics used to track the status of the Kafka broker nodes and maintain the client quotas how much data a producer consumer is allowed to read write Consumer Group A bunch of consumers can join a group in order to cooperate and consume messages from a set of topics This grouping of consumers is called a Consumer Group If two consumers have subscribed to the same topic and are present in the same consumer group then these two consumers would be assigned a different set of partitions and none of these two consumers would receive the same messages Consumer Groups can help attain higher consumption rate if multiple consumers are subscribed to the same topic Follow for the next Kafka blog in the series I shall also be posting more articles talking about Software engineering concepts	2022-02-26 14:46:56
海外TECH	DEV Community	TypeScript generic types	https://dev.to/dailydevtips1/typescript-generic-types-3j38	TypeScript generic typesWhen working with types in TypeScript we assume that we know what kind of type we will be working with For instance to define this log function const logAndReturn input string string gt console log input return input In this simple function we expect a string return a string and that s it But why should this be limited to just strings What if we try to pass a number Hmm that s a bit silly We can t pass numbers to this function And it makes total sense One possible way of solving this would be to use any as the type const logAndReturn input any any gt console log input return input But using this makes it impossible to identify the type from outside It s basically as if you didn t use TypeScript at this point By the use of outside I mean wherever we call this function you should see what type it is being cast to like so So what then TypeScript generic typeThis is precisely where generic types come in handy They can be used to identify that specific called function as a type Making the function itself unaware of which type it s working with To identify a generic type you must prefix the function with lt Type gt where Type is the generic variable Note We often use T for generic types However it s not limited to any name Let s redo the above function as a generic typed function const logAndReturn lt T gt input T T gt console log input return input Now if we want to use this function and pass a string we can do the following logAndReturn lt string gt a string And on inspection it states the following And if we want to convert this to our number we can change the generic type used logAndReturn lt number gt As you can see this is super powerful as we don t need to know the type upfront but keep the reference to the correct types This method is not limited to these existing types We can even define a custom interface that we want to use interface User firstname string lastname string logAndReturn lt User gt firstname Chris lastname Bongers And in that case our function will expect the User type ConclusionI hope you got an excellent first look at Generic types and how we can use them I ll go deeper into specific use cases that will shed a broader light on them in the following articles Thank you for reading and let s connect Thank you for reading my blog Feel free to subscribe to my email newsletter and connect on Facebook or Twitter	2022-02-26 14:25:49
海外TECH	DEV Community	Best websites for illustration	https://dev.to/mihir27/best-illustration-websites-1a14	Best websites for illustrationHello everyoneI found some great websites where you can get nice illustrations for freeManypixelsDesignStripeCraftworkOuchUndrawPixeltrueSkribblReshotGlaze	2022-02-26 14:15:12
海外TECH	DEV Community	🚩 Phases of being GitHub Campus Expert 🚩	https://dev.to/kaiwalyakoparkar/phases-of-being-github-campus-expert-57h	Phases of being GitHub Campus Expert Hey everyone Couple of months ago I became a GitHub Campus Expert It s been an interesting journey from getting selected and going through training Today I am here to tell you the phases a student goes through while becoming a GitHub Campus Expert I have divided this blog into sections Pre Selection phase and Post Selection phase This will help you get a clear picture of how GitHub makes its program different and ideal for building and community growth Let s get to it What is GitHub Campus Expert Program It is a program to help college university student leaders build grow and expand their communities GitHub provides tools training sponsorships etc to help the community overcome their struggles GitHub Campus Experts are trained with public speaking events management and exercises to analyze your community This program selects student leaders twice a year in two cohorts Once in February and in August Now that you have an idea about what is GitHub Campus Experts program is we can get started with the pre selection phase and post selection phase Pre Selection Phase GitHub opens the application twice every year You can check the progress of the application here The Pre Selection phase is divided into parts Essay and video resume This helps the GitHub Education team to understand more about you and your community The essay part consists of questions which are based on the analysis of your community struggles aim etc Once your essays gets submitted and selected you head to video resume part You have to record min video focusing on certain points such as introduction the aim of community and similar things After submitting the video resume you just have to wait for the result to come out If your essays get selected then only you will be proceeding to the video resume stagePersonal tips for getting through the pre selection phase Have a clear aim statement about your community Try to keep your essays focussed and around the aim of the community Be particular about the point you are trying to convey Post Selection Phase This is the most important phase because in this phase you go through training to understand and develop yourself and your community Once you are selected by your essays and video resume you will be invited to GitHub Campus Experts GitHub organization and to an onboarding event Where you will be explained about the program and training methods and will get to meet other new campus experts After the onboarding you will have your own private GitHub repo in the organization where you will update your training essays You will be provided with all the templates and materials for your training You will be trained for public speaking git and github community analysis how to grow community how to become a good leader community ethics etc And you will have to write comprehensive essays following the training with your community into focus There are in total modules which you have to complete before a certain deadline This deadline can be extended by communicating with the program manager The training videos are pre recorded which means you can watch them whenever and wherever you want Once you complete your essays they will be reviewed by the Campus Experts team and you ll be suggested updations if any You will be submitting these essays for review in the form of a pull request so once your pull request is merged you will get GitHub Campus Experts badge on your github profile What next Now you are almost there Next you have to create your campus experts profile which will be visible on the github campus experts website You will be provided with spreadsheets issue templates to get support from the team for all your needs My take on GitHub Campus Experts programI personally really like the program The differentiator of this program from other program is that upon selection it does not just give you a tag but provide you with the training guidance and support you need to develop yourself and your community You are told about the ethics amp values the term communities carry and what makes the term community stand out Thank you so much for reading Like Follow Subscribe to the newsletter Catch me on my socials here	2022-02-26 14:05:33
Apple	AppleInsider - Frontpage News	Apple one of 'Four Giants' in Berkshire Hathaway's investment portfolio	https://appleinsider.com/articles/22/02/26/apple-one-of-four-giants-in-berkshire-hathaways-investment-portfolio?utm_medium=rss	Apple one of x Four Giants x in Berkshire Hathaway x s investment portfolioApple is Berkshire Hathaway s second of Four Giants defining the investment firm s value Warren Buffett has outlined with the iPhone maker only behind a cluster of insurers in importance Warren Buffett is closely affiliated with Berkshire Hathaway s ownership of part of Apple and is a great admirer of the tech giant In an annual letter to Berkshire shareholders Buffett again praises Apple as well as CEO Tim Cook The letter is an annual offering from Buffett and Berkshire Hathaway and has repeatedly heaped adoration on Apple Read more	2022-02-26 14:59:14
海外ニュース	Japan Times latest articles	Ukrainians and supporters stage protest in Tokyo	https://www.japantimes.co.jp/news/2022/02/26/national/japan-protests-ukraine-russia/	Ukrainians and supporters stage protest in TokyoSeveral hundred people gathered in the busy Shibuya Ward in central Tokyo many with their children and Ukrainian flags chanting stop the war and stop	2022-02-26 23:07:53
ニュース	BBC News - Home	Poland boycotts Russia World Cup game over invasion	https://www.bbc.co.uk/sport/football/60536030?at_medium=RSS&at_campaign=KARANGA	Poland boycotts Russia World Cup game over invasionPoland will boycott their World Cup play off against Russia in March because of the invasion of Ukraine with captain Robert Lewandowski saying we can t pretend that nothing is happening	2022-02-26 14:45:52
ニュース	BBC News - Home	Ukraine conflict: Britain sending more arms as fighting reaches Kyiv	https://www.bbc.co.uk/news/uk-60536064?at_medium=RSS&at_campaign=KARANGA	britain	2022-02-26 14:30:17
ニュース	BBC News - Home	British Airways short-haul flights from Heathrow cancelled	https://www.bbc.co.uk/news/business-60533275?at_medium=RSS&at_campaign=KARANGA	issues	2022-02-26 14:01:33
ニュース	BBC News - Home	Christopher Stalford: Mourners gather for DUP MLA's funeral	https://www.bbc.co.uk/news/uk-northern-ireland-60535927?at_medium=RSS&at_campaign=KARANGA	belfast	2022-02-26 14:01:34
ニュース	BBC News - Home	M6 closure: Man dies in crash after police pursuit	https://www.bbc.co.uk/news/uk-england-stoke-staffordshire-60537373?at_medium=RSS&at_campaign=KARANGA	management	2022-02-26 14:17:00
ニュース	BBC News - Home	In pictures: Kyiv under attack	https://www.bbc.co.uk/news/in-pictures-60536824?at_medium=RSS&at_campaign=KARANGA	ukraine	2022-02-26 14:36:29
ニュース	BBC News - Home	Zelensky's defiant response to invasion... in 100 seconds	https://www.bbc.co.uk/news/world-europe-60539193?at_medium=RSS&at_campaign=KARANGA	russian	2022-02-26 14:12:16
ニュース	BBC News - Home	Simple visual guide to what's happening in Ukraine	https://www.bbc.co.uk/news/world-europe-60506298?at_medium=RSS&at_campaign=KARANGA	ukraine	2022-02-26 14:39:11
ニュース	BBC News - Home	Leeds United 0-4 Tottenham Hotspur: Heavy defeat increases pressure on Marcelo Bielsa's side	https://www.bbc.co.uk/sport/football/60441970?at_medium=RSS&at_campaign=KARANGA	Leeds United Tottenham Hotspur Heavy defeat increases pressure on Marcelo Bielsa x s sideLeeds suffer another damaging defeat in their bid to avoid Premier League relegation as Tottenham cruise to a dominant victory at Elland Road	2022-02-26 14:45:45
ニュース	BBC News - Home	Six Nations: Paul Willemse gives France early lead against Scotland at Murrayfield	https://www.bbc.co.uk/sport/av/rugby-union/60539397?at_medium=RSS&at_campaign=KARANGA	Six Nations Paul Willemse gives France early lead against Scotland at MurrayfieldLock Paul Willemse completes a free flowing move to give France an early lead against Scotland in the Six Nations at Murrayfield	2022-02-26 14:52:09
北海道	北海道新聞	ウクライナから１１万人避難　周辺国に、医療列車も派遣	https://www.hokkaido-np.co.jp/article/650365/	unhcr	2022-02-26 23:18:00
北海道	北海道新聞	ロシア軍がクラスター弾使用か　人権団体が４人死亡と発表	https://www.hokkaido-np.co.jp/article/650364/	人権団体	2022-02-26 23:18:00
北海道	北海道新聞	立憲、参院選候補を石川氏に決定　無所属とし立憲、国民双方での推薦も検討	https://www.hokkaido-np.co.jp/article/650337/	常任幹事会	2022-02-26 23:18:09
北海道	北海道新聞	道内４月上旬並み陽気　落雪相次ぎ３人死傷　２７日も平年より暖かく	https://www.hokkaido-np.co.jp/article/650363/	上川管内	2022-02-26 23:15:00