投稿時間:2021-07-26 08:18:48 RSSフィード2021-07-26 08:00 分まとめ(23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…	JCB、｢Apple PayのPASMO×JCB限定！Wチャンスキャンペーン｣を開催中	https://taisy0.com/2021/07/26/143439.html	applepay	2021-07-25 22:31:48
TECH	Engadget Japanese	富士通ノートPCの技術から生まれた、最高のモバイルキーボード『LIFEBOOK UH Keyboard』	https://japanese.engadget.com/lifebook-uh-keyboard-223031561.html	富士通ノートPCの技術から生まれた、最高のモバイルキーボード『LIFEBOOKUHKeyboard』カラーについてのご案内本プロジェクトは、カラー展開を含めたチャレンジとなっており、各色台を達成して製品化となります。	2021-07-25 22:30:31
IT	ITmedia 総合記事一覧	[ITmedia News] NASA、エウロパ探査はSpaceXの「Falcon Heavy」で	https://www.itmedia.co.jp/news/articles/2107/26/news066.html	falconheavy	2021-07-26 07:22:00
IT	ITmedia 総合記事一覧	[ITmedia エグゼクティブ] サイバー侵害が発生して当然ともいえる状況では発想や考え方を変えることが重要――サイバーディフェンス研究所 名和利男氏	https://mag.executive.itmedia.co.jp/executive/articles/2107/26/news017.html	itmedia	2021-07-26 07:05:00
IT	ITmedia 総合記事一覧	[ITmedia エグゼクティブ] 量子コンピューティングがもたらす未来～ユースケースの実現ステップと業界インパクト～	https://mag.executive.itmedia.co.jp/executive/articles/2107/26/news012.html	itmedia	2021-07-26 07:02:00
AWS	lambdaタグが付けられた新着投稿 - Qiita	【Node.js, TypeScript】LINE MessagingAPIで作った天気予報アプリをAWS SAMを使ってデプロイしてみる！	https://qiita.com/Ryo9597/items/f4cd222657a9278bfce9	それでは、これをSSMを使ってLambda内で使えるようにしていきましょう。	2021-07-26 07:50:34
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	tf.padを使用するとGANの損失がおかしくなる。	https://teratail.com/questions/351224?rss=all	tfpadを使用するとGANの損失がおかしくなる。	2021-07-26 07:49:54
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	Vueのコードをpugに変更したい	https://teratail.com/questions/351223?rss=all	Vueのコードをpugに変更したい前提・実現したいことVueのコードをpugに書き換えています。	2021-07-26 07:49:36
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	(jQuery, JavaScript)プルダウンに初期値「選択してください」を入れたい	https://teratail.com/questions/351222?rss=all	jQueryJavaScriptプルダウンに初期値「選択してください」を入れたいやりたいことプルダウンエリアとプルダウンアトラクションがあります。	2021-07-26 07:27:16
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	<iframe>内に指定した時間から再生できる動画を入れて切り替えたい	https://teratail.com/questions/351221?rss=all	ltiframegt内に指定した時間から再生できる動画を入れて切り替えたい自社のサイトで、ワードプレスにYoutube動画を入れてページを作成しています。	2021-07-26 07:26:09
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	決済システムのフロー	https://teratail.com/questions/351220?rss=all	amazon	2021-07-26 07:25:02
AWS	AWSタグが付けられた新着投稿 - Qiita	【Node.js, TypeScript】LINE MessagingAPIで作った天気予報アプリをAWS SAMを使ってデプロイしてみる！	https://qiita.com/Ryo9597/items/f4cd222657a9278bfce9	それでは、これをSSMを使ってLambda内で使えるようにしていきましょう。	2021-07-26 07:50:34
海外TECH	Ars Technica	Zombies are coming to SyFy with first Day of the Dead series trailer	https://arstechnica.com/?p=1782914	zombies	2021-07-25 22:43:18
海外TECH	DEV Community	Difference Between useState and useRef in React	https://dev.to/aoussiadmehdi/difference-between-usestate-and-useref-in-react-1eab	Difference Between useState and useRef in ReactThis article is originally published at WebDevIdea React is an extremely popular JavaScript library for building user interfaces A lot of developers prefer this library because it s all based on components and has a lot of cool packages that we can use In addition to that now we have React hooks which came to save us from the complexity of class components React Hooks are very powerful and allow us to use state in functional components They also give us the ability to create logic and functionality inside stateless functional components Many developers now prefer to use hooks and functional components rather than class components because the class syntax is a little hard to write There are a lot of useful hooks that you can use in your React code to create logic and add features to your components That s why in this article we will learn about both the hooks useState and useRef by covering the differences between them So let s get started The useState hookThe hook useState is just a function that accepts one argument initial state and returns two things The current state the value of our state A function that allows us to update that current state The hook useState allows us to have state in functional components and we can use it to create a lot of cool things in React With useState we can for example change the text after clicking a button or create a counter and so on There is a lot you can do with this important hook in React So if you want to start using useState in React you will have to import it first from the react package Here is an example import React useState from react Now after importing it from the react package you can use the hook inside functional components without any problems ExamplesIn the example below we will use the hook useState to create text and update it after clicking a button import useState import React useState from react function MyComponent Using useState const name setName useState Mehdi JSX return lt gt lt h gt name lt h gt lt button onClick gt setName John gt Change Name lt button gt lt gt export default MyComponent As you can see above the hook useState allowed us to update the state after clicking the button We passed a string name as an argument for the hook function you can pass it anything such as an array number boolean all that depends on what type of state you re dealing with Also notice that we used ES array destructuring to specify the initial state and the updater function The value name refers to the initial state Mehdi and the value setName refers to the function that will allow up to update the state We also called the updater function setName in the click event in order to update the name state from Mehdi to John As a result the value name inside the heading h gets updated after clicking the button So the hook useState is very useful as it allows us to use state and update it inside functional components without having to use class syntax Here is another example of a counter that allows us to increment the number by after clicking a button import useState import React useState from react function MyComponent Using useState const counter setCounter useState JSX return lt gt lt h gt counter lt h gt lt button onClick gt setCounter counter gt Increment lt button gt lt gt export default MyComponent In this example we set the initial state to number as a parameter for the hook function That s because we are dealing with numbers and we need to increment the number by each time we click the button The updater function setCounter allows us to update the state to the current state plus As a result we can increment the counter by after each click You can also check out a live demo on Stackblitz if you want The useRef hookThe hook useRef is a bit similar to useState it returns an object that has a property current inside which we can access using object dot notation That property current takes the value of the argument that we pass to the function useRef So the hook useRef also accepts one argument the initial value for the property current Also keep in mind that the returned object will persist for the full lifetime of the component Again to start using the hook you have to import it from React first Then you can use it without any problems import React useRef from react Let s try the hook in the console to see how it works using useRef and giving it as a parameter const ourRef useRef console log ourRef current console log ourRef current As you can see useRef returns an object containing a property that has the value of the parameter we passed We can access that value using object dot notation useRef is powerful because it s persisted between renders Unlike useState useRef doesn t cause a component to re render when the value or state changes To make things more clear let s look at a practical example We will show you the same example of the incrementing counter that we did above with useState but now using useRef Here is the example import useRef import React useRef from react function MyComponent Using useRef const ourRef useRef JSX return lt gt lt h gt ourRef current lt h gt lt button onClick gt ourRef current ourRef current gt Increment lt button gt lt gt export default MyComponent As you can see we set the initial value to and we accessed the property current in the returned object to increment our counter by Now the problem is that the number doesn t increment even though if we click the button That s because the hook useRef doesn t cause the component to re render The component needs to render in order to update the UI If you printed the value of the current property in the console you will realize that when you click the button the value actually increments by But it doesn t show up in the UI because the component doesn t get re rendered So useRef is not a good option for creating a counter You can check out a live demo on Stackblitz if you want UseRef usecasesOne of the main use cases of using the hook useRef is to reference DOM elements in React Every element in the DOM has an attribute called ref which we can set our ref to Here is an example that allows us to access an input element and focus on it after clicking a button const Mycomponent gt const inputRef useRef null const inputFocus gt inputRef current focus return lt gt lt input ref inputRef gt lt button onClick inputFocus gt Focus on the Input lt button gt lt gt Another use case of useRef is for the storage that is persisted across component renders The hook useRef allows us to store the previous value of a state You can learn more about that if you re interested useState VS useRefFor useState Allows functional components to have their own state Allows us to update the state inside components It causes components to re render after state updates Returns the current state Has an updater function that updates the state For useRef Returns an object with a property containing the initial value Doesn t cause a component to re render when the value or state changes Data is persisted between renders Allows to reference DOM elements So these are the differences between these two extremely useful React hooks ConclusionAs you can see both the hooks useState and useRef are a bit similar The difference is that useState returns the current state and has an updater function that updates the state While useRef returns an object doesn t cause components to re render and it s used to reference DOM elements Thank you for reading this article	2021-07-25 22:25:32
Apple	AppleInsider - Frontpage News	Kanye West's 'Donda' will be released on August 6	https://appleinsider.com/articles/21/07/25/kanye-wests-donda-will-be-released-on-august-6?utm_medium=rss	Kanye West x s x Donda x will be released on August Following an unusual launch livestream on Apple Music it appears Kanye West fans will have to wait until August before being able to listen to the new album Donda on the music streaming service Kanye West delivering a keynote at an Apple Store in After holding a sell out live event to promote the tenth Kanye West album fans have been waiting to be able to stream the tracks from Donda In an update posted to Twitter it seems that everyone will have to wait until August to stream it Read more	2021-07-25 22:01:26
金融	ニュース - 保険市場TIMES	FinatextとスマートプラスSSI、「サービス組み込み用キャンセル保険」提供を開始	https://www.hokende.com/news/blog/entry/2021/07/26/080000	FinatextとスマートプラスSSI、「サービス組み込み用キャンセル保険」提供を開始サービスに「キャンセル保険」を組み込み提供する事業者向け株式会社Finatext以下、Finatext、スマートプラス少額短期保険株式会社以下、スマートプラスSSI、あいおいニッセイ同和損害保険株式会社は年月日、自社サービスに「キャンセル保険」をシームレスに組み込んで提供した事業者向けに、「サービス組み込み用キャンセル保険」の提供を開始することを発表した。	2021-07-26 08:00:00
ニュース	BBC News - Home	Speakers' Corner: Woman attacked with knife	https://www.bbc.co.uk/news/uk-57965251	police	2021-07-25 22:04:58
北海道	北海道新聞	姿現し始めたボールパーク、地元住民が熱視線　北広島で日ハム新球場見学会	https://www.hokkaido-np.co.jp/article/570838/	北広島市内	2021-07-26 07:17:39
北海道	北海道新聞	ロシア政府、首相の択捉訪問発表　プーチン氏公認、支配誇示	https://www.hokkaido-np.co.jp/article/570950/	北方領土	2021-07-26 07:16:00
ビジネス	東洋経済オンライン	日経平均3万円復活への｢2つの条件｣がほぼ整った 気になる菅内閣の支持率も今後徐々に回復へ？ | 市場観測 | 東洋経済オンライン	https://toyokeizai.net/articles/-/443268?utm_source=rss&utm_medium=http&utm_campaign=link_back	日経平均	2021-07-26 07:30:00
ビジネス	プレジデントオンライン	｢そんなダラけて…｣メンタル不調で休職したワーママに向けられる家族の厳しすぎる視線 - きちんと休めずに復職が遠のく	https://president.jp/articles/-/48126	人間関係	2021-07-26 08:00:00
ビジネス	プレジデントオンライン	｢そんなダラけて…｣メンタル不調で休職したワーママに向けられる家族の厳しすぎる視線 - きちんと休めずに復職が遠のく	https://president.jp/articles/-/48102	人間関係	2021-07-26 08:00:00
デザイン	UXMilk	アテンションエコノミーにおける倫理的なデザインの重要性	https://uxmilk.jp/73430	韓国	2021-07-25 22:45:27