投稿時間:2023-04-22 19:10:08 RSSフィード2023-04-22 19:00 分まとめ(11件)

カテゴリー等	サイト名等	記事タイトル・トレンドワード等	リンクURL	頻出ワード・要約等/検索ボリューム	登録日
IT	気になる、記になる…	Apple、2027年に32インチと42インチの有機ELディスプレイを採用した製品を計画か	https://taisy0.com/2023/04/22/171034.html	出荷台数	2023-04-22 09:57:50
IT	気になる、記になる…	Googleの折りたたみ式スマホ｢Pixel Fold｣の実機動画が流出か	https://taisy0.com/2023/04/22/171032.html	google	2023-04-22 09:33:52
IT	気になる、記になる…	｢探す｣アプリから未発表Macの3つの機種IDが見つかる	https://taisy0.com/2023/04/22/171030.html	apple	2023-04-22 09:22:04
TECH	Techable（テッカブル）	被写体の細部まで写し出すLAOWAの新機種、スーパー35センサー対応の2倍マクロレンズ	https://techable.jp/archives/203600	anhuichangge	2023-04-22 09:00:09
python	Pythonタグが付けられた新着投稿 - Qiita	【Python】DataFrameでCSVを読み込む(メモ)	https://qiita.com/Tadano_syachiku/items/61368504a034a50b7533	iddatenamesalesiddatename	2023-04-22 18:50:09
python	Pythonタグが付けられた新着投稿 - Qiita	代入・copy・copyメソッド・deepcopyの使い分け表	https://qiita.com/Gen0001/items/5e261725ca20643424e9	deepcopy	2023-04-22 18:48:55
python	Pythonタグが付けられた新着投稿 - Qiita	インストールした Python ライブラリを VSCode 上で読み込めない時の対処法	https://qiita.com/Yz_Iori/items/b44ea347d435a9e930ff	importmodule	2023-04-22 18:29:14
Ruby	Railsタグが付けられた新着投稿 - Qiita	CSSで背景を透過させる方法	https://qiita.com/uuuDi_97722/items/aea600c6d71a721f342c	backgroundcol	2023-04-22 18:05:23
海外TECH	DEV Community	Unleashing the Power of JavaScript Proxy: A Comprehensive Introduction for Developers	https://dev.to/wizdomtek/unleashing-the-power-of-javascript-proxy-a-comprehensive-introduction-for-developers-3f4j	Unleashing the Power of JavaScript Proxy A Comprehensive Introduction for DevelopersJavaScript is one of the most widely used programming languages in the world today It is a versatile language that is used for everything from building websites and web applications to creating mobile applications and desktop software One of the features that make JavaScript so powerful is the ability to use proxies In this blog we will provide a comprehensive introduction to JavaScript Proxy and how you can leverage its power as a developer What is a Proxy in JavaScript A proxy in JavaScript is an object that allows you to intercept and customize certain operations that are performed on another object This means that a proxy can be used to intercept operations like property access property assignment function invocation and more When a proxy is used it creates a wrapper around the original object which allows you to modify or enhance the behavior of that object The syntax for creating a proxy in JavaScript is as follows let proxy new Proxy target handler The target parameter is the object that the proxy will wrap around and the handler parameter is an object that defines the behavior of the proxy Creating a Basic ProxyLet s start by creating a basic proxy that intercepts property access on an object In this example we will create a proxy around an object that has a name property let person name John let handler get function target property receiver console log Getting property return target property let proxy new Proxy person handler console log proxy name When this code is executed it will output Getting name to the console and then return the value of the name property which is John By using a proxy we were able to intercept the property access operation and log a message to the console before returning the value of the property Creating a Proxy for Property AssignmentIn addition to intercepting property access proxies can also be used to intercept property assignments In this example we will create a proxy that logs a message to the console whenever a property is assigned a new value let person name John let handler set function target property value receiver console log Setting property to value target property value return true let proxy new Proxy person handler proxy name Jane console log proxy name In this example we created a proxy that intercepts the set operation and logs a message to the console before setting the value of the property When we assign a new value to the name property it will log Setting name to Jane to the console before setting the value of the property The return true statement is necessary to indicate that the operation was successful Creating a Proxy for Function InvocationProxies can also be used to intercept function invocations In this example we will create a proxy that logs a message to the console before invoking a function let person name Glikpo sayHello function console log Hello my name is this name let handler apply function target thisArg argumentsList console log Calling function target name return target apply thisArg argumentsList let proxy new Proxy person sayHello handler proxy In this example we created a proxy around the sayHello function of the person object The handler object intercepts the apply operation which is called when the function is invoked The apply operation is used to log a message to the console before invoking the function When we call the proxy function it will log Calling function sayHello to the console before invoking the sayHello function which will output Hello my name is John ConclusionIn conclusion JavaScript Proxy is a powerful feature that allows you to intercept and customize certain operations that are performed on an object Proxies can be used to intercept property access property assignment function invocation and more By using a proxy you can modify or enhance the behavior of an object without modifying the original object directly This makes it a powerful tool for developers who want to create more flexible and customizable code We hope this comprehensive introduction to JavaScript Proxy has helped you understand its power and how you can leverage it in your own code	2023-04-22 09:36:57
ニュース	BBC News - Home	Dominic Raab dismissed my behaviour warnings - Lord McDonald	https://www.bbc.co.uk/news/uk-politics-65358258?at_medium=RSS&at_campaign=KARANGA	behaviour	2023-04-22 09:39:59
ニュース	BBC News - Home	CBI suspends key activities after rape and sex assault allegations	https://www.bbc.co.uk/news/business-65355466?at_medium=RSS&at_campaign=KARANGA	firms	2023-04-22 09:43:41