投稿時間:2022-05-05 14:09:56 RSSフィード2022-05-05 14:00 分まとめ(13件)

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AWS	lambdaタグが付けられた新着投稿 - Qiita	Lambdaで、現在日時と特定の日付を容易に比較する （Node.js）	https://qiita.com/holdout0521/items/c9ad545d15cfed8328d0	lambda	2022-05-05 13:06:26
js	JavaScriptタグが付けられた新着投稿 - Qiita	選択した画像を表示&JsでLaravelに画像データを送る方法(自分用メモ)	https://qiita.com/yoshiakidayo/items/c6b89e9adb873e81a62e	ampjs	2022-05-05 13:43:11
js	JavaScriptタグが付けられた新着投稿 - Qiita	【JavaScript】React Hooks＋TypeScript周りをやってみた感想	https://qiita.com/iwasiman/items/7e723e943b39d54706de	javascript	2022-05-05 13:03:11
AWS	AWSタグが付けられた新着投稿 - Qiita	Lambdaで、現在日時と特定の日付を容易に比較する （Node.js）	https://qiita.com/holdout0521/items/c9ad545d15cfed8328d0	lambda	2022-05-05 13:06:26
Git	Gitタグが付けられた新着投稿 - Qiita	[swift]SourceTreeでのgit-flow	https://qiita.com/taro-ken/items/bdd82dce23d281ebaba7	ccessfulgitbranchingmodel	2022-05-05 13:03:13
海外TECH	DEV Community	React Tricks Miniseries 4: How to pass props more efficiently	https://dev.to/theeasydev/react-tricks-miniseries-4-how-to-pass-props-more-efficiently-g5m	React Tricks Miniseries How to pass props more efficientlyReact is all about props and the more you use reusable components the more scaleable your react app will become if done correctly of course Passing props to a child component may be trivial but many developers do it wrong We ve all been there though Most of use pass props in one of two way Either passing every property we wish to use or passing an object containing the props we want to use Method lt Card cardObject cardObject gt Method lt Card title title description description rating rating gt With the first scenario we d need to retreive the props inside the Card component in a less than efficient way export default function Card props const title description rating props cardObject And with the second scenario when the list of props gets long it becomes too inefficient to add them all one by one SolutionThe best practice method is to use object destructuring like this lt Card cardObject gt then retrieve the props in the usualy wayexport default function Card title description rating This method is a lot cleaner more efficient and scales much better for long lists of props ConclusionUsing object destructuring we can achieve better and more efficient props passing to react components Have you always used this method Or just learned it now Let me know in the comments	2022-05-05 04:24:17
海外TECH	DEV Community	Understanding closures in JavaScript	https://dev.to/digomic/understanding-closures-in-javascript-54pg	Understanding closures in JavaScriptClosures are functions that have access to variables from another function s scope This is often accomplished by creating a function inside a function function createComparisonFunction propertyName return function object object let value object propertyName let value object propertyName if value lt value return else if value gt value return else return The highlighted lines in this example are part of the inner function an anonymous function that is accessing a variable propertyName from the outer function Even after the inner function has been returned and is being used elsewhere it has access to that variable This occurs because the inner function s scope chain includes the scope of createComparisonFunction The activation object for the function is initialized with values for arguments and any named arguments The outer function s activation object is the second object in the scope chain This process continues for all containing functions until the scope chain terminates with the global execution context As the function executes variables are looked up in the scope chain for the reading and writing of values function compare value value if value lt value return else if value gt value return else return let result compare This code defines a function named compare that is called in the global execution context When compare is called for the first time a new activation object is created that contains arguments value and value The global execution context s variable object is next in the compare execution context s scope chain which contains this result and compare The this ObjectUsing the this object inside closures introduces some complex behaviors When a function is not defined using the arrow syntax the this object is bound at runtime based on the context in which a function is executed when used inside global functions this is equal to window in nonstrict mode and undefined in strict mode whereas this is equal to the object when called as an object method Anonymous functions are not bound to an object in this context meaning the this object points to window unless executing in strict mode Because of the way closures are written however this fact is not always obvious window identity The Window let object identity My Object getIdentityFunc return function return this identity console log object getIdentityFunc The Window Remember that each function automatically gets two special variables as soon as the function is called this and arguments An inner function can never access these variables directly from an outer function It is possible to allow a closure access to a different this object by storing it in another variable that the closure can access window identity The Window let object identity My Object getIdentityFunc let that this return function return that identity console log object getIdentityFunc My Object It s unlikely that you ll intentionally use the patterns in lines two or three but it is helpful to know that the value of this can change in unexpected ways when syntax is changed slightly this link for more information about closuressupport me for more content	2022-05-05 04:04:45
Apple	AppleInsider - Frontpage News	Dr. Dre lost $200 million by leaking Apple Beats deal early	https://appleinsider.com/articles/22/05/05/dr-dre-lost-200-million-by-leaking-apple-beats-deal-early?utm_medium=rss	Dr Dre lost million by leaking Apple Beats deal earlyDr Dre famously leaked the deal that would lead to Apple s acquisition of Beats ーand a new book shows how the premature celebration cost the rapper million and almost put an end to the deal Tripp Mickle s new book via iMore explores how an untimely celebration reduced the payout to Dr Dre and Beats staff in the billion acquisition in Chapter of After Steve How Apple Became a Trillion Dollar Company and Lost Its Soul describes Apple s entry into music streaming in the early s Read more	2022-05-05 04:04:10
ニュース	BBC News - Home	Afghanistan: UK not delivering on Afghan pledge - ex-Army boss	https://www.bbc.co.uk/news/uk-61327882?at_medium=RSS&at_campaign=KARANGA	afghan	2022-05-05 04:53:20
北海道	北海道新聞	経産相、ロ産石油禁輸の実施否定　「日本は資源に限界ある」	https://www.hokkaido-np.co.jp/article/677269/	経済産業相	2022-05-05 13:03:48
北海道	北海道新聞	泊原発事故時、バス避難厳しく　道内６社中の半数「できない・困難」　道の説明不足背景に	https://www.hokkaido-np.co.jp/article/677197/	北海道電力	2022-05-05 13:00:54
海外TECH	reddit	恭喜谷爱凌加入辱华大军	https://www.reddit.com/r/DoubanGoosegroup/comments/uiozvy/恭喜谷爱凌加入辱华大军/	bangoosegrouplinkcomments	2022-05-05 04:08:54
ニュース	THE BRIDGE	WebSummit、2023年からリオ・デ・ジャネイロへの進出を発表	https://thebridge.jp/2022/05/websummit-announces-rio-expansion	WebSummit、年からリオ・デ・ジャネイロへの進出を発表ポルトガルのリスボンで毎年開催されているスタートアップカンファレンス「WebSummit」が、年からブラジルでも開催されることが決定した。	2022-05-05 05:00:45