投稿時間:2022-03-21 06:19:33 RSSフィード2022-03-21 06:00 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
TECH	Engadget Japanese	2013年3月21日、Eメールに対応した極小PHS「ストラップフォン2」（WX06A）が発売されました：今日は何の日？	https://japanese.engadget.com/today21-203014260.html	開発	2022-03-20 20:30:14
python	Pythonタグが付けられた新着投稿 - Qiita	2のN乗分2進数全パターンの配列を作成する	https://qiita.com/kzy83/items/889ed95fee335fb625e4	それではこの進数全パターンを用いて、貿易収支の全パターンを計算します。	2022-03-21 05:38:36
python	Pythonタグが付けられた新着投稿 - Qiita	Python基礎❸	https://qiita.com/Naoki_74goriken/items/ae8ee37004c11826938f	Python基礎❸サードパーティーパッケージの導入Pythonでは、標準だけでもさまざまな機能があるが、インターネット上で個人や企業が公開している「サードパーティ製パッケージ」を追加して様々な便利な機能を使うことができる。	2022-03-21 05:27:05
python	Pythonタグが付けられた新着投稿 - Qiita	Tkinterでペイントもどきを作る	https://qiita.com/kuwabatake/items/482e72c429d6274d7b76	Tkinterでペイントもどきを作るtkinterのcanvasで遊んでいる内に思いついたのでちょっとづつ思いつくまま作っていきますマウスで簡単な絵が描けるモノを作るまずはwindowsのペイントにある鉛筆を作りますコードはこんな感じPaintModokipycodingutfimporttkinterclassPaintModokidefinitself操作中の図形のIDselfcurridメインウィンドウ作成roottkinterTkroottitle無題画像表示用キャンバス作成selfcanvastkinterCanvasrootbgwhiteselfcanvaspackexpandTruefilltkinterBOTHキーバインドselfcanvasbindltButtonPressgtselfonkeyleftselfcanvasbindltBMotiongtselfdraggingrootmainloopマウス左ボタン押下defonkeyleftselfevent直線描画selfcurridselfcanvascreatelineeventxeventyeventxeventyfillblackwidthドラッグ中defdraggingselfeventpointsselfcanvascoordsselfcurridpointsextendeventxeventyselfcanvascoordsselfcurridpointsifnamemainPaintModokiコードの説明メイン画面一杯にcanvas一個だけ作成しマウスのマウス左ボタン押したときとドラッグ中のキーバインドを作成します。	2022-03-21 05:03:08
js	JavaScriptタグが付けられた新着投稿 - Qiita	2のN乗分2進数全パターンの配列を作成する	https://qiita.com/kzy83/items/889ed95fee335fb625e4	それではこの進数全パターンを用いて、貿易収支の全パターンを計算します。	2022-03-21 05:38:36
Docker	dockerタグが付けられた新着投稿 - Qiita	【Docker】DockerDesktopが起動しない場合の対処法	https://qiita.com/P-man_Brown/items/92ad6da648894aa2b344	DockerDesktopが起動しない場合の対処法環境PCMacBookProinchMOSmacOSMontereyDockerDesktop状況下画像赤枠の「UsegRPCFUSEforfilesharing」をオフにした後、「ApplyampRestart」し、DockerDesktopを再起動したところ「DockerDesktopStarting」のままで起動しなくなりました。	2022-03-21 05:06:56
Git	Gitタグが付けられた新着投稿 - Qiita	gitを使ったバージョン管理手順(社内ファイルサーバ＋Win10)	https://qiita.com/kglpochi/items/03dbe44befe218ed3785	ここで新しいブランチを作るgitbranchは、新しいブランチ名は、もとにするブランチ名もとにするブランチ名を省略すると、現在チェックアウトしているブランチをもとに新しいブランチが作られる今作った新しいブランチをチェックアウトするgitcheckoutそこで開発を行って、ローカルリポジトリの新しいブランチ上にコミットするローカルリポジトリでマスターブランチをチェックアウトするリモートリポジトリからmasterブランチをフェッチマージして最新にしておく※ここではmasterブランチは触っていない前提。	2022-03-21 05:46:44
海外TECH	DEV Community	Are you using useCallback properly 🤔	https://dev.to/markoarsenal/are-you-using-usecallback-properly-5g2c	Are you using useCallback properly I didn t up until recently On the project my team is working on we were use useCallback for every function prop passed to the child components This approach doesn t give you benefits as you may expect Our code looked like this not literally const ParentComponent gt const onClick useCallback gt console log click return lt ChildComponent onClick onClick gt const ChildComponent onClick gt return lt button onClick onClick gt Click me lt button gt Approach without useCallbackconst ParentComponent gt return lt ChildComponent onClick gt console log click gt The benefits of the first approach compared to the second one are minimal and in some cases considering the cost of useCallback the second approach is faster The thing is creating and destroying functions on each rerender is not an expensive operation as you may think and replacing that with useCallback doesn t bring much benefits Another reason why we always used the useCallback hook is to prevent the child component rerender if its props didn t change but this was wrong because whenever the parent component rerenders the child component will rerender as well nevertheless the child props are changed or not React memoIf you want to rerender the child component only when its props or state changed you want to use React memo You can achieve the same with PureComponent or shouldComponentUpdate if you are working with class components instead of functional If we wrap ChildComponent from our first example with React memoconst ChildComponent React memo onClick gt return lt button onClick onClick gt Click me lt button gt when the ParentComponent rerenders and props of the ChildComponent don t change the ChildComponent will not rerender This gives us a good insight when we should use useCallback hook useCallback should be used in combination with the React memo I will not say that should be always the case you can use useCallback without React memo if you find it useful but in most cases those two should be the pair When to use React memoThere are no clear instructions on when to do it someone thinks you should use it always and I m for the approach measure performance of your component and optimize it with React memo if needed The components which you can wrap with React memo by default are those with a lot of children like tables or lists Now we will take a look at an example You can clone it and try it by yourself from here It looks like this very creative We have a long list of comments a good candidate for React memo and we have the counter button on the top whose main purpose is to trigger the rerender The code looks like thisconst Home gt const counter setCounter useState const onClick useCallback gt console log click return lt Profiler id Home page onRender compName mode actualTime baseTime gt console log compName mode actualTime baseTime gt lt main className max w xl p m auto gt lt div className flex justify center mb gt lt button onClick gt setCounter counter className px py border border gray gt Update counter lt button gt lt div gt lt Comments comments comments onClick onClick gt lt main gt lt Profiler gt You can notice Profiler component as a root component it s this one We are using it to measure rendering times You can notice onRender callback we are logging a couple of things inside but the most important are actualTime and baseTime The actualTime is the time needed for component rerender and baseTime is the time to rerender component without any optimizations So if you don t have any optimizations within your component actualTime and baseTime should be equal Comments component looks like this notice that is wrapped with React memo const Comments comments onClick CommentsProps gt return lt section gt comments map comment gt return lt Comment comment className mb onClick onClick key comment id gt lt section gt export default memo Comments Now I will run our example with comments in Chrome hit the Update button a few times to cause rerender and post results here So on every rerender we are saving around ms which is considerable Let s try one more thing instead of the list of the comments to render one memoized comment and see what measurements are lt Comments comments comments onClick onClick gt lt Comment comments onClick onClick gt Still we have time savings but they are neglecting which means that React does not have trouble rerendering those small and simple components and memoizing those doesn t have much sense On the other hand memoizing component that contains a lot of children is something you can benefit from Hope you enjoyed reading the article and that now you have a better overview of useCallback and React memo and when to use them	2022-03-20 20:16:34
海外TECH	DEV Community	Take your GitHub profile to the next level with these easy steps	https://dev.to/dawsoncodes/take-your-github-profile-to-the-next-level-with-these-easy-steps-3p6n	Take your GitHub profile to the next level with these easy stepsHello developers it s Dawson As you might know GitHub is one of the best places when it comes to sharing your programming skills when applying for jobs so no better way to show off your skills than having an eye grabbing GitHub profile not only does it show you re passionate and love your job it will also make you stand out when applying for a job In this article I will show you what makes a good GitHub profile and how to build one Read the article here	2022-03-20 20:03:28
Apple	AppleInsider - Frontpage News	Cricut Maker review: Extremely versatile machine that needs software innovation	https://appleinsider.com/articles/22/03/20/cricut-maker-review-an-extremely-versatile-machine-that-could-use-some-software-innovation?utm_medium=rss	Cricut Maker review Extremely versatile machine that needs software innovationThe king of the craft world the Cricut Maker can help bring your paper card and sticker based projects to life but with software limitations and at a hefty cost Cricut has come a long way from the mid s You may remember the first Cricut commercials featuring chipper women inserting clunky cartridges into something that looked like a combination of a fax machine and a toaster oven In the fifteen years since its launch Cricut has expanded its capabilities considerably and added several new machines to its lineup Read more	2022-03-20 20:35:02
Apple	AppleInsider - Frontpage News	'CODA,' Ted Lasso' continue Apple TV+'s winning streak at PGA Awards	https://appleinsider.com/articles/22/03/20/coda-ted-lasso-continue-apple-tvs-winning-streak-at-pga-awards?utm_medium=rss	x CODA x Ted Lasso x continue Apple TV x s winning streak at PGA AwardsShows and films on Apple TV are continuing to enjoy critical acclaim with CODA and Ted Lasso picking up gongs at the Producers Guild Awards The rd annual Producers Guild Awards took place on Saturday and with four nominations Apple TV stood a good chance at a win In the end its programming secured two awards with one being a potential good sign for Oscar success CODA won the Darryl F Zanuck Award for Outstanding producer of Theatrical Motion Pictures at the ceremony reports Deadline The historic win makes CODA the first film from a streaming service to win the award Read more	2022-03-20 20:16:21
海外TECH	Engadget	Netflix will release a Tekken animated series later this year	https://www.engadget.com/netflix-tekken-bloodlines-announcement-204027341.html?src=rss	Netflix will release a Tekken animated series later this yearHaving helped bring properties like DotA nbsp and Castlevania nbsp to TV Netflix is once again turning to a historic gaming franchise to add to its content library On Saturday the streamer announced it would release Tekken Bloodline an animated adaption of Bandai Namco s popular fighting game series in In the trailer Netflix shared alongside the announcement we re introduced to protagonist Jin Kazama who joined the franchise as a playable character in s Tekken In the show Kazama embarks on a quest for revenge when his mother Jun falls to what she calls a demon Kazama subsequently turns to his grandfather Heihachi Mishima for help If old man Mishima gives off a sinister vibe it s because he s the main villain of the Tekken franchise Kazama s quest eventually leads him to The King of Iron Fist Tournament where we see some familiar faces Outside of knowing it will come out later this year we don t have an exact release date for Tekken Bloodline Netflix s track record with video game adaptations has mostly depended on the companies it has partnered with to work on those projects Productions like Arcane nbsp and The Witcher Nightmare of the Wolf have been a success for the company thanks to the involvement of studios like Fortiche and Studio Mir	2022-03-20 20:40:27
ニュース	BBC News - Home	Nottingham Forest 0-1 Liverpool: Jurgen Klopp's side set up semi-final date against Man City after edging past hosts	https://www.bbc.co.uk/sport/football/60698123?at_medium=RSS&at_campaign=KARANGA	Nottingham Forest Liverpool Jurgen Klopp x s side set up semi final date against Man City after edging past hostsLiverpool will play Manchester City in the FA Cup semi final at Wembley after they edge past Nottingham Forest in a pulsating quarter final at the City Ground	2022-03-20 20:42:57
ニュース	BBC News - Home	Jones and England set to muddle on and hope magic emerges again	https://www.bbc.co.uk/sport/rugby-union/60814659?at_medium=RSS&at_campaign=KARANGA	england	2022-03-20 20:15:02
ニュース	BBC News - Home	FA Cup highlights: Late Diogo Jota goal helps Liverpool edge past Nottingham Forest	https://www.bbc.co.uk/sport/av/football/60809234?at_medium=RSS&at_campaign=KARANGA	FA Cup highlights Late Diogo Jota goal helps Liverpool edge past Nottingham ForestWatch highlights as Diogo Jota s th minute goal helps Liverpool edge past Nottingham Forest to set up an FA Cup semi final against Manchester City	2022-03-20 20:54:05
ビジネス	ダイヤモンド・オンライン - 新着記事	東芝・日立・NEC…日の丸半導体「没落」の2大原因をTSMC創業者が辛辣喝破 - 半導体・電池・EV 台湾が最強の理由	https://diamond.jp/articles/-/299331	半導体メーカー	2022-03-21 05:25:00
ビジネス	ダイヤモンド・オンライン - 新着記事	資格受験のプロが「過去問は5割だけ解け」と言い切る理由 - はぶく勉強法	https://diamond.jp/articles/-/299351	資格受験のプロが「過去問は割だけ解け」と言い切る理由はぶく勉強法コロナ禍で将来への不安が高まり、また企業による副業解禁の動きが進む中、ビジネスパーソンの間で資格試験への関心が高まっている。	2022-03-21 05:20:00
ビジネス	ダイヤモンド・オンライン - 新着記事	楽天・メルカリ…IT5社が驚異の「9四半期連続」2ケタ増収！増収率No.1は？ - ダイヤモンド 決算報	https://diamond.jp/articles/-/299548	楽天・メルカリ…IT社が驚異の「四半期連続」ケタ増収増収率Noはダイヤモンド決算報コロナ禍が年目に突入し、多くの業界や企業のビジネスをいまだに揺さぶり続けている。	2022-03-21 05:15:00
ビジネス	ダイヤモンド・オンライン - 新着記事	全国「認知症疾患医療センター」大調査！診断設備、入院対応、注力分野…全22項目【東京編】 - 決定版 後悔しない「認知症」	https://diamond.jp/articles/-/298640	医療機関	2022-03-21 05:10:00
ビジネス	ダイヤモンド・オンライン - 新着記事	「消費減税ありき」の野党共闘では参院選は勝てない - 政策・マーケットラボ	https://diamond.jp/articles/-/299442	時代遅れ	2022-03-21 05:05:00
北海道	北海道新聞	英、中国に対ロ非難求める　支持は間違いと警告	https://www.hokkaido-np.co.jp/article/659292/	首相	2022-03-21 05:18:00
北海道	北海道新聞	小林陵侑６位、ジャンプＷ杯　次戦にも３季ぶり総合優勝	https://www.hokkaido-np.co.jp/article/659290/	小林陵侑	2022-03-21 05:08:00
ビジネス	東洋経済オンライン	今年こそ海外旅行できる？渡航にいくつかの条件 徐々に緩和の方向だが､気軽には行けない | レジャー・観光・ホテル | 東洋経済オンライン	https://toyokeizai.net/articles/-/540032?utm_source=rss&utm_medium=http&utm_campaign=link_back	東洋経済オンライン	2022-03-21 05:30:00