投稿時間:2023-05-14 16:11:21 RSSフィード2023-05-14 16:00 分まとめ(14件)

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python	Pythonタグが付けられた新着投稿 - Qiita	Pythonでデータフレームの列の値を基に円グラフを描画し、特定の部分を強調表示する	https://qiita.com/F8LUUI5kOxLvrmuIAIPwFsUWSKNdgW5N/items/75dc3b267487f9d755e5	matplotlib	2023-05-14 15:57:06
python	Pythonタグが付けられた新着投稿 - Qiita	Pandasを用いたデータフレームの操作：結合と重複率の計算	https://qiita.com/F8LUUI5kOxLvrmuIAIPwFsUWSKNdgW5N/items/4f381bbd073c57909a31	pandas	2023-05-14 15:35:23
python	Pythonタグが付けられた新着投稿 - Qiita	Python Pandasで特定の列をダミー変数化する方法	https://qiita.com/F8LUUI5kOxLvrmuIAIPwFsUWSKNdgW5N/items/08fb665508057ece0d83	integrateddata	2023-05-14 15:09:58
python	Pythonタグが付けられた新着投稿 - Qiita	PythonのSeriesのfloat64をint64に変換する方法	https://qiita.com/F8LUUI5kOxLvrmuIAIPwFsUWSKNdgW5N/items/eccd02ebbab541ca7468	float	2023-05-14 15:06:46
js	JavaScriptタグが付けられた新着投稿 - Qiita	【Rails7】図解でTurbo Frames入門	https://qiita.com/moriw0/items/2a3fe3ae2ead77d05ba7	rails	2023-05-14 15:11:57
Ruby	Rubyタグが付けられた新着投稿 - Qiita	RubyでAtCoder ABC259(A, B, C)を解いてみた	https://qiita.com/shoya15/items/3bedd9590b1963b008d7	atcoder	2023-05-14 15:21:01
Ruby	Rubyタグが付けられた新着投稿 - Qiita	RubyでChrome Extensionを作れるフレームワーク、"unloosen"を使ってContent Sctiptを作成した	https://qiita.com/fussy113/items/0d9971b9fc076f16536a	rubykaigi	2023-05-14 15:17:43
Ruby	Rubyタグが付けられた新着投稿 - Qiita	Rails DMで画像と動画を送信できるようにする方法	https://qiita.com/YukiyaOgura/items/5cff7796bab8d1c2642b	railsdm	2023-05-14 15:08:30
Azure	Azureタグが付けられた新着投稿 - Qiita	Azure OpenAI Serviceによる生成系AIでより迅速にサービス構築をする「全４部構成」	https://qiita.com/kane_sss/items/66a796a4d1c1b6587191	azureopenaiservice	2023-05-14 15:45:57
Ruby	Railsタグが付けられた新着投稿 - Qiita	【Rails7】図解でTurbo Frames入門	https://qiita.com/moriw0/items/2a3fe3ae2ead77d05ba7	rails	2023-05-14 15:11:57
Ruby	Railsタグが付けられた新着投稿 - Qiita	Rails DMで画像と動画を送信できるようにする方法	https://qiita.com/YukiyaOgura/items/5cff7796bab8d1c2642b	railsdm	2023-05-14 15:08:30
海外TECH	DEV Community	7 Secret TypeScript Tricks Pros Use 😎🤫	https://dev.to/ruppysuppy/7-secret-typescript-tricks-pros-use-3ckg	Secret TypeScript Tricks Pros Use TypeScript is an outstanding tool to make our lives easier amp avoiding bugs yet sometimes feels overwhelming to use This article outlines TypeScript tricks that will make your life easier which all pros use Type InferenceTypescript is smart enough to infer the data types when you help it narrow them down enum CounterActionType Increment INCREMENT IncrementBy INCREMENT BY interface IncrementAction type CounterActionType Increment interface IncrementByAction type CounterActionType IncrementBy payload number type CounterAction IncrementAction IncrementByAction function reducer state number action CounterAction switch action type case CounterActionType Increment TS infers that the action is IncrementAction amp has no payload return state case CounterActionType IncrementBy TS infers that the action is IncrementByAction amp has a number as a payload return state action payload default return state As shown above TypeScript infers the type of the action based on the type property so you DON T need to check whether payload exists Literal TypesOften you need specific values for a variable that s where literal types come in handy type Status idle loading success error It works for numbers too type Review or better yet const reviewMap terrible average good great incredible as const This will generate the same type as above but it s much more maintainabletype Review typeof reviewMap keyof typeof reviewMap Type GuardsType guards are another method to narrow down the type of a variable function isNumber value any value is number return typeof value number const validateAge age any gt if isNumber age validation logic else console error The age must be a number NOTE In the example above it s better to use const validateAge age number gt The example was a simplification to show how type guards work Index SignatureWhen you have dynamic keys in an object you can use an index signature to define its type enum PaticipationStatus Joined JOINED Left LEFT Pending PENDING interface ParticipantData id string PaticipationStatus const participants ParticipantData id PaticipationStatus Joined id PaticipationStatus Left id PaticipationStatus Pending GenericsGenerics are a powerful tool to make your code more reusable It allows you to define a type that will be determined by the use of your function In the following example T is a Generic type const clone lt T gt object T gt const clonedObject T JSON parse JSON stringify object return clonedObject const obj a b c const obj clone obj Immutable TypesYou can make your types immutable by adding as const This ensures that you don t end up accidentally changing the values const ErrorMessages InvalidEmail Invalid email InvalidPassword Invalid password as const This will throw an errorErrorMessages InvalidEmail New error message Partial Pick Omit amp Required TypesOften while working with server amp local data you need to make some properties optional or required Instead of defining hundreds of interfaces with slightly altered versions of the same data You can do that using Partial Pick Omit amp Required types interface User name string age number email string type PartialUser Partial lt User gt type PickUser Pick lt User name age gt type OmitUser Omit lt User age gt type RequiredUser Required lt User gt PartialUser is equivalent to interface PartialUser name string age number email string PickUser is equivalent to interface PickUser name string age number OmitUser is equivalent to interface OmitUser name string email string RequiredUser is equivalent to interface RequiredUser name string age number email string And of course you can use intersection to combine them type A B amp C Where B amp C are any types That s all folks Resources usedFreepikGiphy 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 bi 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	2023-05-14 06:15:36
ニュース	BBC News - Home	Cyclone Mocha: Intense storm hits Bangladesh and Myanmar coast	https://www.bbc.co.uk/news/world-asia-65587321?at_medium=RSS&at_campaign=KARANGA	bengal	2023-05-14 06:35:05
ニュース	BBC News - Home	Eurovision euphoria on the streets of Liverpool for host city's big night	https://www.bbc.co.uk/news/entertainment-arts-65585209?at_medium=RSS&at_campaign=KARANGA	nightthe	2023-05-14 06:38:59