投稿時間:2022-03-18 07:21:01 RSSフィード2022-03-18 07:00 分まとめ(52件)

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海外TECH	DEV Community	The basic React hooks - useState and useEffect	https://dev.to/naimlatifi5/the-basic-react-hooks-usestate-and-useeffect-103	The basic React hooks useState and useEffectIn the new version of React are introduced React hooks which are functions that allow us to access state and other lifecycle features without a need to use classes In this article I am going to show you some of the basic hooks useState and useEffect useStateThe React useState allow us to track state inside function components The useState hook that we import from React library accepts an initial value that is assigned only on initial render and returns an array Let s see this by an exampleFrom the example above we have initialized the state with value zero of type integer but that value can be of any other types like arrays objects null string etc The first value count that is destructed is a variable that holds the current state and the second element setCount is our function that takes a new value to update the state variable So whenever we click the button the setCount function will be called and update the state count useEffectIt allows us to perform side effects inside functional components But what do we mean with side effects Well these are some of the operations that we have already used with lifecycle methods in class based components such as fetching data from the server reading from a localStorage updating the DOM registering and deregistering event listeners etc It is important to state that the useEffect differs completely from lifecycle methods in class based components both in abstraction level and how we use it The signature for the useEffect accept a callback function and an optional dependency array looks as below Now let s take an example and see how we can execute a side effects with useEffect For the demonstration purpose in the example below we will create two buttons where Update name button will update name Superman and button Update versions will update Superman s strongest versions As we can see inside useEffect we have omitted the dependancy array as a second argument thus a re render is caused on initial load of component and whenever any of the buttons are clicked As a result a console statements will get printed Name Superman and Strongest versions Supermen prime But what if we have a scenario so that we only want to load data when component is loaded i e when fetching data from server We can achieve this with the help of useEffect dependency array as follow Adding dependency array from the example above will output the console statement with a message on the initial component load If any of the buttons are clicked it will not trigger a re render of the component but will only update the state for the button clicked Moreover with the help of a dependency array we can also execute useEffects that are dependent on a certain condition From the example above if the state for name and strongest versions has changed From the example above a particular useEffect is invoked when a particular button is clicked and a particular state has changed Clicking on the button Update name only one console statement is printed as Name Superman and not both as in the earlier example where dependency array was omitted Hope you enjoy it Keep in eye ️on my other series of articles where I am going to write for other React hooks useContext useRef useReducer useCallback useMemo useImperativeHandle useLayoutEffect useDebugValue ‍‍	2022-03-17 21:33:12
海外TECH	Engadget	'Hogwarts Legacy' will hit Xbox, PlayStation and PC this holiday season	https://www.engadget.com/hogwarts-legacy-release-date-211858471.html?src=rss	x Hogwarts Legacy x will hit Xbox PlayStation and PC this holiday seasonHogwarts Legacy will arrive on PC PlayStation PS Xbox One and Xbox Series consoles in holiday Hogwarts Legacy was announced in late and it was originally due to come out in but was later delayed to The quot holiday quot timeframe is one step closer to an actual release date And that s not all ーduring today s State of Play livestream dedicated to the open world RPG WB Games Avalanche dropped a trailer offering the first real look at how this sucker will look and play Hogwarts Legacy is a spinoff of the Harry Potter universe but it takes place long before the events of the books It s set in the s and places players in their fifth year at Hogwarts School of Witchcraft and Wizardry where they ll learn spells brew potions grow magical plants tame wild beasts and attend classes Players have a unique ability to manipulate ancient magic and with that they hold the key to saving the wizarding world from dark forces nbsp As familiar as that sounds this is a game filled with original storylines and Harry Potter author JK Rowling She Who Must Not Be Named isn t directly involved in its development Hogwarts Legacy features fresh professors students villains mentors and creatures plus some familiar ghosts Players will be able to fly on broomsticks gain friends who will join them on quests and upgrade their abilities based on how they like to play It s not all contained to Hogwarts either ーthe shops at Hogsmeade are also available to explore	2022-03-17 21:18:58
海外TECH	Engadget	Meghan Markle readies podcast after meetings with Spotify on misinformation policies	https://www.engadget.com/meghan-markle-spotify-podcast-release-date-210302544.html?src=rss	Meghan Markle readies podcast after meetings with Spotify on misinformation policiesThe podcast deal Prince Harry and Meghan Markle signed with Spotify is finally close to bearing significant fruit As The Vergereports Markle is releasing a podcast series on Spotify this summer through the couple s Archewell Audio production company Details weren t available but the show is premiering after Harry and Meghan were quot encouraged quot by discussions over Spotify s efforts to fight misinformation The news is a quot result of those meetings quot Archewell said Harry and Meghan haven t been thrilled with Spotify s approach so far The duo said they had been expressing concerns about misinformation since April Their worries became all the more pressing when Neil Young BrenéBrown and other creatives began pulling or withholding content from Spotify in protest over the company s seeming tolerance of COVID misinformation from Joe Rogan s podcast Archewell spokesperson Toya Holness said the company was partnering with Spotify to develop quot policies practices and strategies quot to curb misinformation and improve transparency The news may be welcome for Spotify Prince Harry and Meghan Markle struck their podcast deal with Spotify in December but haven t produced anything apart from a holiday special Markle s podcast series could both help Spotify recoup some of its investment and address concerns it was fighting its own podcast partners The challenge of course is persuading other Spotify exclusive podcast hosts and networks to follow suit Spotify has signed a number of high profile exclusives but not all of them have been successful ーfilmmaker Ava DuVernay exited her first look deal just a year after announcing it Markle s podcast may show that some creators are willing to stick around but there are no guarantees others will be quite so confident	2022-03-17 21:03:02
海外科学	NYT > Science	Tennessee Valley Authority Defies Biden’s Clean Energy Goals	https://www.nytimes.com/2022/03/17/climate/tennessee-valley-authority-biden-climate.html	Tennessee Valley Authority Defies Biden s Clean Energy GoalsPresident Biden wants electricity generated from wind solar and other clean sources The Tennessee Valley Authority plans to invest in fossil fuels instead	2022-03-17 21:30:58
ニュース	BBC News - Home	Shells rain down on Kharkiv as Ukraine's army stands firm	https://www.bbc.co.uk/news/world-europe-60785679?at_medium=RSS&at_campaign=KARANGA	russia	2022-03-17 21:21:19
ニュース	BBC News - Home	P&O Ferries sparks outrage by sacking 800 workers	https://www.bbc.co.uk/news/business-60779001?at_medium=RSS&at_campaign=KARANGA	guards	2022-03-17 21:26:09
ニュース	BBC News - Home	Ukraine conflict: Putin lays out his demands in Turkish phone call	https://www.bbc.co.uk/news/world-europe-60785754?at_medium=RSS&at_campaign=KARANGA	callrussia	2022-03-17 21:39:21
ニュース	BBC News - Home	Emiliano Sala: Footballer died after plane broke up mid-air	https://www.bbc.co.uk/news/uk-wales-60767283?at_medium=RSS&at_campaign=KARANGA	airthe	2022-03-17 21:18:12
ニュース	BBC News - Home	P&O Ferries: 'We've been abandoned by the company', say sacked staff	https://www.bbc.co.uk/news/uk-60783784?at_medium=RSS&at_campaign=KARANGA	angry	2022-03-17 21:44:28
ニュース	BBC News - Home	Stokes hits sublime 120 to light up second Test against Windies	https://www.bbc.co.uk/sport/cricket/60783924?at_medium=RSS&at_campaign=KARANGA	barbados	2022-03-17 21:47:22
北海道	北海道新聞	大谷、２２日に実戦初登板　オープン戦か練習試合で	https://www.hokkaido-np.co.jp/article/658274/	大谷翔平	2022-03-18 06:13:53
北海道	北海道新聞	ロシア利払い、債権者受領　デフォルト回避か	https://www.hokkaido-np.co.jp/article/658273/	期限	2022-03-18 06:03:00
北海道	北海道新聞	鉄の原料そっくりクッキー　室蘭工大、地元ＰＲに一役	https://www.hokkaido-np.co.jp/article/658272/	北海道室蘭市	2022-03-18 06:03:45
ビジネス	東洋経済オンライン	｢今年度に業績がV字回復する企業｣ランキング 首位は今期の営業利益が前期比160倍に急回復 | 企業ランキング | 東洋経済オンライン	https://toyokeizai.net/articles/-/539495?utm_source=rss&utm_medium=http&utm_campaign=link_back	営業利益	2022-03-18 06:30:00
ニュース	THE BRIDGE	東南アジアの自動車ECユニコーンCarsome、シンガポールの自動車関連サービスCarTimesを買収	https://thebridge.jp/2022/03/carsome-acquires-majority-stake-in-singapores-cartimes-automobile-20220317	東南アジアの自動車ECユニコーンCarsome、シンガポールの自動車関連サービスCarTimesを買収マレーシアに本社を置く総合自動車EコマースのユニコーンCarsomeGroupは、シンガポールの自動車ソリューション企業CarTimesAutomobile株式のを取得した。	2022-03-17 21:45:46
ニュース	THE BRIDGE	クロスチェーン投資分析ダッシュボード「Harvest」運営、Binance（幣安）らから1,800万米ドルをシード調達	https://thebridge.jp/2022/03/binance-backs-defi-firms-18m-seed-raise	クロスチェーン投資分析ダッシュボード「Harvest」運営、Binance幣安らから万米ドルをシード調達TechinAsiaでは、有料購読サービスを提供。	2022-03-17 21:30:44
ニュース	THE BRIDGE	自分の複数SNSのリンクを一括提示できる豪Linktree、1.1億米ドルを資金調達しユニコーンに	https://thebridge.jp/2022/03/linktree-110-million-unicorn	自分の複数SNSのリンクを一括提示できる豪Linktree、億米ドルを資金調達しユニコーンにTechinAsiaでは、有料購読サービスを提供。	2022-03-17 21:15:44