投稿時間:2022-07-17 16:16:30 RSSフィード2022-07-17 16:00 分まとめ(18件)

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IT	ITmedia 総合記事一覧	[ITmedia ビジネスオンライン] ミレニアル世代が小学生の時によく遊んだゲーム　3位「マリオカート」、2位「どうぶつの森」、1位は？	https://www.itmedia.co.jp/business/articles/2207/17/news031.html	hiclub	2022-07-17 15:30:00
python	Pythonタグが付けられた新着投稿 - Qiita	cookiecutterを使って自分専用のpythonプロジェクトテンプレートを作る	https://qiita.com/hirayama_yuuichi/items/fe34b3179858fbaa2a4c	pipinstallcookiec	2022-07-17 15:11:29
js	JavaScriptタグが付けられた新着投稿 - Qiita	Quagga.js でバーコード読取してみた	https://qiita.com/tinymouse/items/6aa75c30f828fe3f0c42	cordova	2022-07-17 15:00:29
Azure	Azureタグが付けられた新着投稿 - Qiita	Azure Functions を Visual Studio 2022で作成してみた	https://qiita.com/forest1/items/ff6ddc7e8275295e7d3b	qiita	2022-07-17 15:07:54
海外TECH	DEV Community	7 Tips for Clean React TypeScript Code you Must Know 🧹✨	https://dev.to/ruppysuppy/7-tips-for-clean-react-typescript-code-you-must-know-2da2	Tips for Clean React TypeScript Code you Must Know Clean code isn t code that just works It refers to neatly organized code which is easy to read simple to understand and a piece of cake to maintain Let s take a look at some of the best practices for clean code in React which can take the ease of maintaining your code to the moon Provide explicit types for all valuesQuite often while using TypeScript a lot of people skip out on providing explicit types for values thus missing out on the true benefit TypeScript has to offer Often these can be seen in code base Bad Example const Component children any gt Bad Example const Component children object gt Instead using a properly defined interface would make your life so much easier with the editor providing you accurate suggestions Good Example import ReactNode from react interface ComponentProps children ReactNode const Component children ComponentProps gt Take the previous state into account while updating the stateIt is always advisable to set state as a function of the previous state if the new state relies on the previous state React state updates can be batched and not writing your updates this way can lead to unexpected results Bad Example import React useState from react export const App gt const isDisabled setIsDisabled useState false const toggleButton gt setIsDisabled isDisabled here toggling twice will yeild the same result as toggling once const toggleButtonTwice gt toggleButton toggleButton return lt div gt lt button disabled isDisabled gt I m isDisabled disabled enabled lt button gt lt button onClick toggleButton gt Toggle button state lt button gt lt button onClick toggleButtonTwice gt Toggle button state times lt button gt lt div gt Good example import React useState from react export const App gt const isDisabled setIsDisabled useState false const toggleButton gt setIsDisabled isDisabled gt isDisabled const toggleButtonTwice gt toggleButton toggleButton return lt div gt lt button disabled isDisabled gt I m isDisabled disabled enabled lt button gt lt button onClick toggleButton gt Toggle button state lt button gt lt button onClick toggleButtonTwice gt Toggle button state times lt button gt lt div gt Keep your files lean amp cleanKeeping your files atomic and lean makes debugging maintaining and even finding the files a walk in the park Bad Example src App tsxexport default function App const posts id title How to write clean react code id title Eat sleep code repeat return lt main gt lt nav gt lt h gt App lt h gt lt nav gt lt ul gt posts map post gt lt li key post id gt post title lt li gt lt ul gt lt main gt Good Example src App tsxexport default function App return lt main gt lt Navigation title App gt lt Posts gt lt main gt src components Navigation tsxinterface NavigationProps title string export default function Navigation title NavigationProps return lt nav gt lt h gt title lt h gt lt nav gt src components Posts tsxexport default function Posts const posts id title How to write clean react code id title Eat sleep code repeat return lt ul gt posts map post gt lt Post key post id title post title gt lt ul gt src components Post tsxinterface PostProps title string export default function Post title PostProps return lt li gt title lt li gt Use Enums or Constant Objects for values with multiple statesThe process of managing variables that can take multiple states can be eased a lot by using Enums or Constant Objects Bad Example import React useState from react export const App gt const status setStatus useState Pending return lt div gt lt p gt status lt p gt lt button onClick gt setStatus Pending gt Pending lt button gt lt button onClick gt setStatus Success gt Success lt button gt lt button onClick gt setStatus Error gt Error lt button gt lt div gt Good Example import React useState from react enum Status Pending Pending Success Success Error Error OR const Status Pending Pending Success Success Error Error as const export const App gt const status setStatus useState Status Pending return lt div gt lt p gt status lt p gt lt button onClick gt setStatus Status Pending gt Pending lt button gt lt button onClick gt setStatus Status Success gt Success lt button gt lt button onClick gt setStatus Status Error gt Error lt button gt lt div gt Use TS free TSX as much as possibleHow can TSX be TS free Relax we are talking only about the Markup part NOT the entire component Keeping it function free makes the component easier to understand Bad Example const App gt return lt div gt lt button onClick gt gt Toggle Dark Mode lt button gt lt div gt Good Example const App gt const handleDarkModeToggle gt return lt div gt lt button onClick handleDarkModeToggle gt Toggle Dark Mode lt button gt lt div gt NOTE If the logic is a one liner then using it in the TSX is quite acceptable Elegantly Conditionally Rendering ElementsConditionally rendering elements is one of the most common tasks in React thus using clean conditionals is a necessity Bad Example const App gt const isTextShown setIsTextShown useState false const handleToggleText gt setIsTextShown isTextShown gt isTextShown return lt div gt isTextShown lt p gt Now You See Me lt p gt null isTextShown amp amp lt p gt isTextShown is true lt p gt isTextShown amp amp lt p gt isTextShown is false lt p gt lt button onClick handleToggleText gt Toggle lt button gt lt div gt Good Example const App gt const isTextShown setIsTextShown useState false const handleToggleText gt setIsTextShown isTextShown gt isTextShown return lt div gt isTextShown amp amp lt p gt Now You See Me lt p gt isTextShown lt p gt isTextShown is true lt p gt lt p gt isTextShown is false lt p gt lt button onClick handleToggleText gt Toggle lt button gt lt div gt Use JSX shorthands Boolean PropsA truthy prop can be provided to a component with just the prop name without a value like this truthyProp Writing it like truthyProp true is unnecessary Bad Example interface TextFieldProps fullWidth boolean const TextField fullWidth TextFieldProps gt const App gt return lt TextField fullWidth true gt Good Example interface TextFieldProps fullWidth boolean const TextField fullWidth TextFieldProps gt const App gt return lt TextField fullWidth gt String PropsA String Prop value can be provided in double quotes without the use of curly braces or backticks Bad example interface AvatarProps username string const Avatar username AvatarProps gt const Profile gt return lt Avatar username John Wick gt Good example interface AvatarProps username string const Avatar username AvatarProps gt const Profile gt return lt Avatar username John Wick gt Undefined PropsJust like basic TypeScript JavaScript if a prop is not provided a value it will be undefined Bad Example interface AvatarProps username string const Avatar username AvatarProps gt const Profile gt return lt Avatar username undefined gt Good Example interface AvatarProps username string OR username string undefined const Avatar username AvatarProps gt const Profile gt return lt Avatar gt Now you too know how to write clean TSX Research says writing down your goals on pen amp paper makes you to more likely to achieve them Check out these notebooks and journals to make the journey of achieving your dreams easier Thanks for readingNeed a Top Rated Front End Development Freelancer to chop away your development woes Contact me on UpworkWant to see what I am working on Check out my Personal Website and GitHubWant to connect Reach out to me on LinkedInFollow me on Instagram to check out what I am up to recently Follow my blogs for Weekly new Tidbits on DevFAQThese are a few commonly asked questions I get So I hope this FAQ section solves your issues I am a beginner how should I learn Front End Web Dev Look into the following articles Front End Development RoadmapFront End Project IdeasWould you mentor me Sorry I am already under a lot of workload and would not have the time to mentor anyone	2022-07-17 06:22:49
海外TECH	DEV Community	How important is math in programming?	https://dev.to/smeetsmeister/how-important-is-math-in-programming-4789	How important is math in programming A frequently asked question is How important is math in programming In this blog post we will dive into math in programming How important is math in programming What math do you need in your day to day work as a programmer At the end of this post you should have a clear picture of how important math is in programming I m Jelle I was a backend developer for several years The last class I took in math was in high school at age The last topic we touched on was the Pythagorean theorem at the Dutch VMBO level general education development for Americans Did my lack of math skills give me any issues in my developer career How important is math in programming One of the first remarks I got when I told non programmer people that I was a developer is you must be good at math It is a common misconception that if you want to be a programmer you need a solid mathematical background This is not the case In over years as a developer I hardly used anything more complex than additions subtraction amp percentages in my day to day work In those other cases googling your subject or watching a Youtube video was helpful enough The skills to be good at math and programming do overlap To be good at math you need to be good at logical thinking and able to think algorithmically Dividing your problems into smaller steps to solve X How important is math in programming In most cases you will do fine with the basics Additions subtractions amp percentages should solve of your day to day work Do you want to become a better programmer Check what most overlooked skill you need to learn to become a better programmer How important is math in programming In what cases does math help In programming you will learn a lot of things regarding the domain you are working on I ve worked several years in the printing domain I had no related knowledge but building on features for several years taught me several printing related topics You can say the same for math If you are working on domains or features that do not require maths you probably don t need math skills In my years as a backend developer I learned more about business logic like shipping regulations printing terminology and APIs than maths However if you spend your time on a math heavy domain like taxes or statistics you might do better with maths Calculating and checking if you have applied the correct taxes on your e commerce webshop goes a lot easier if you have a solid understanding of percentages ConclusionHow important is math in programming Like all good questions the answer is not really black amp white Having experience with math does not hurt But it is not as important as most people might think It depends if you are going to work on a topic that does not require math skills it could be you never need it Are you going to work on a math heavy topic like taxes or statistics In that case you have benefits from knowing your math To summarize In most cases you just need the basics of math The skillset you need to be good at math and programming overlap The ability to think logically and solve problems Some domains you will be working on need more math skills than others I hope you enjoyed this post And you were able to answer the question How important is math in programming To keep up to date on new posts and level up your skillset as a developer subscribe to the newsletter or follow me on Twitter	2022-07-17 06:09:50
海外ニュース	Japan Times latest articles	Japan to allow defense budget requests without specific amounts	https://www.japantimes.co.jp/news/2022/07/17/national/politics-diplomacy/japan-defense-budget-ceiling/	Japan to allow defense budget requests without specific amountsThe government usually sets a ceiling on spending requests to avoid expenditures from increasing too much and straining Japan s already worsening finances	2022-07-17 15:39:30
海外ニュース	Japan Times latest articles	Young people bring new energy to Fukushima Prefecture town	https://www.japantimes.co.jp/news/2022/07/17/national/fukushima-futaba-revitalization/	Young people bring new energy to Fukushima Prefecture townWith Futaba having seen an exodus of its residents estimated at around before the March disasters a group of people from elsewhere are	2022-07-17 15:08:21
海外ニュース	Japan Times latest articles	South Korea celebrates Pride after two-year hiatus	https://www.japantimes.co.jp/news/2022/07/17/asia-pacific/social-issues-asia-pacific/south-korea-pride-hiatus/	South Korea celebrates Pride after two year hiatusSouth Korea s Pride parade returned from a two year hiatus due to the pandemic with revelers chanting and waving rainbow flags in Seoul as conservative groups	2022-07-17 15:03:11
ニュース	BBC News - Home	Bear photography takes great-grandmother round the world	https://www.bbc.co.uk/news/uk-wales-62152869?at_medium=RSS&at_campaign=KARANGA	mongolia	2022-07-17 06:13:42
ニュース	BBC News - Home	World Athletics Championships: Fred Kerley wins men's 100m gold in US clean sweep of medals	https://www.bbc.co.uk/sport/athletics/62193431?at_medium=RSS&at_campaign=KARANGA	World Athletics Championships Fred Kerley wins men x s m gold in US clean sweep of medalsFred Kerley wins his first individual World Championship title as he leads an American clean sweep of the men s m medals on home soil	2022-07-17 06:11:50
北海道	北海道新聞	リード、樋口と谷井が銀メダル　デュアスロンで上田２位	https://www.hokkaido-np.co.jp/article/706851/	銀メダル	2022-07-17 15:29:00
北海道	北海道新聞	フラダンスと書道の甲子園が交流　大会誕生で縁エール互いに	https://www.hokkaido-np.co.jp/article/706843/	新型コロナウイルス	2022-07-17 15:26:10
北海道	北海道新聞	上川管内７５人感染　旭川は５３人　新型コロナ	https://www.hokkaido-np.co.jp/article/706849/	上川管内	2022-07-17 15:15:00
北海道	北海道新聞	後志管内３９人感染　小樽は２３人　新型コロナ	https://www.hokkaido-np.co.jp/article/706848/	新型コロナウイルス	2022-07-17 15:14:00
北海道	北海道新聞	米大統領「手ぶら」で帰国　石油増産、サウジ確約せず	https://www.hokkaido-np.co.jp/article/706847/	米大統領	2022-07-17 15:08:00
北海道	北海道新聞	大谷２安打、前半戦終える　大リーグ、鈴木は２試合４安打	https://www.hokkaido-np.co.jp/article/706846/	大リーグ	2022-07-17 15:05:00
海外TECH	reddit	維新の足立康史さん「しかし、そもそも、私が不勉強だからか、統一教会（世界平和統一家庭連合）の何が問題なのか、正確に承知していません。問題がないなら、当該宗教の存在を否定するつもりもないし、そこに「関わっている」自民党議員が多数いても、批判するつもりはありません。私自身は「関わらない」というだけです。」	https://www.reddit.com/r/newsokuexp/comments/w10lod/維新の足立康史さんしかしそもそも私が不勉強だからか統一教会世界平和統一家庭連合の何が問題なのか正確に/	ornewsokuexplinkcomments	2022-07-17 06:11:45