投稿時間:2021-12-26 17:24:58 RSSフィード2021-12-26 17:00 分まとめ(28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
ROBOT	ロボスタ	【読者プレゼント】「Amazon Echo ロゴ入りマスク」を抽選で10名様に	https://robotstart.info/2021/12/26/present-amazon-echo-mask.html	amazonecho	2021-12-26 07:37:02
python	Pythonタグが付けられた新着投稿 - Qiita	[Python] パッケージ中の __main__.py モジュール	https://qiita.com/z6wdc/items/9748487152ebf8d1aaae	class	2021-12-26 16:25:36
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	python tkinterについて	https://teratail.com/questions/375629?rss=all		2021-12-26 16:54:03
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	WordPressで投稿のstatusを変えたら管理画面の一覧ページに遷移する方法	https://teratail.com/questions/375628?rss=all	WordPressで投稿のstatusを変えたら管理画面の一覧ページに遷移する方法カスタム投稿タイプnewsの投稿画面で「公開」or「非公開」or「下書き保存」or「予約投稿」ボタンを押した時に、管理画面のカスタム投稿タイプnewsの一覧ページに遷移させたいと思っています。	2021-12-26 16:50:05
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	Axiosからデータを取り出して変数に代入したい	https://teratail.com/questions/375627?rss=all	Axiosからデータを取り出して変数に代入したい前提・実現したいことTypeScriptでYoutubeLiveのコメントを取得できるプログラムを作っています。	2021-12-26 16:48:17
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	自動販売機のお釣りを計算するプログラムで○○円足りませんという内容を出力させたい。	https://teratail.com/questions/375626?rss=all	自動販売機のお釣りを計算するプログラムで円足りませんという内容を出力させたい。	2021-12-26 16:44:15
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	OSErrorを解決したい	https://teratail.com/questions/375625?rss=all	OSErrorを解決したい前提・実現したいことtkinterで作ったウィンドウに再起動ボタンをつけて、ボタンを押すと再起動される。	2021-12-26 16:43:17
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	spのみ改行・border-radiusという記述がしたい	https://teratail.com/questions/375624?rss=all		2021-12-26 16:42:26
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	nuxtサブディレクトリにデプロイ	https://teratail.com/questions/375623?rss=all	nuxtサブディレクトリにデプロイnuxtでアプリを作成しXserverで公開しようとしています。	2021-12-26 16:40:51
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	ドラゴンが飛んだ後の挙動制御のアイディアがほしい	https://teratail.com/questions/375622?rss=all	距離	2021-12-26 16:39:57
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	エラーコード：too many indices for array: array is 2-dimensional, but 3 were indexed	https://teratail.com/questions/375621?rss=all	エラーコードtoomanyindicesforarrayarrayisdimensionalbutwereindexed前提・実現したいこと下記のエラーが発生しました。	2021-12-26 16:28:34
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	HTML/CSSレイアウトについて	https://teratail.com/questions/375620?rss=all		2021-12-26 16:27:55
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	本番環境しか発生しないException	https://teratail.com/questions/375619?rss=all		2021-12-26 16:13:08
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	子オブジェクトだけ衝突判定を取得したい	https://teratail.com/questions/375618?rss=all		2021-12-26 16:09:32
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	Excel VBA Find関数のインデックス範囲について	https://teratail.com/questions/375617?rss=all	最終的にはリストビューに表示したいのですが、後ほど取り掛かろうと思うのでいったんMsgBoxにしています。	2021-12-26 16:02:31
AWS	AWSタグが付けられた新着投稿 - Qiita	AWSデータベースの可用性について整理する	https://qiita.com/zumastee/items/f256bb2dab1fdef55873	プライマリインスタンスで使用していたキャッシュをレプリカに同期することで、FO時のパフォーマンス影響を最低限に抑える狙いがある。	2021-12-26 16:53:09
技術ブログ	Developers.IO	Developer IO Thailand を開催しました（イベントレポート）	https://dev.classmethod.jp/articles/event-report-developer-io-thailand/	method	2021-12-26 07:35:53
海外TECH	DEV Community	A Text to Speech Converter for busy bodies	https://dev.to/david050708/a-text-to-speech-converter-for-busy-bodies-3gp7	A Text to Speech Converter for busy bodiesHello Devs It s me Dave again In these days it s tough to get free time because of the stress in work from home and we can t read stories or books we love To get rid of that problem we are going to create a really simple console based Text to Speech ConverterRequirements Python of course pyttsx package You can install it via pip install pyttsximport pyttsxwhile True thetext input Please enter the text you wish n pyttsx speak thetext This is really simple console based appFeel free to give feedback in the comments below Contact davidjeremiah gmail comDiscord DJ Thank You	2021-12-26 07:48:35
海外TECH	DEV Community	React Interview Questions (Mid - Senior Level)	https://dev.to/frontendengineer/react-interview-questions-part-2-mid-senior-level-cal	React Interview Questions Mid Senior Level Here are some advance common React interview questions that may be asked on your next interview Good luck if you are about to interview and I hope this material will help you What are React Hooks React Hooks are a new addition in React version They let you use state and other React features without converting functional components to a class Hooks does the same job with less code and with less code means less chances of producing bugs Basic Hooks useStatereturns a stateful value and a function to update it useEffectlets us perform side effects in function components useContextgives a simple function to access the data via value prop of the Context Provider in any child component Additional Hooks useReducerstate management like redux for managing state in smaller applications rather than having to reach for a third party state management library useCallbackmemoizes callback functions so they not recreated on every re render useMemostores the results of expensive operations useReflets us perform side effects in function components useImperativeHandleUsed together with forwardRef which allows you to modify the ref instance that is exposed from parent components useLayoutEffectthis runs synchronously immediately after React has performed all DOM mutations useDebugValueallows you to display additional helpful information next to your custom Hooks with optional formatting What is context Context provides a way to pass data through component tree without having to pass props down manually at every level It is designed to share data that can be considered global for a tree of React components Note Apply it sparingly because it makes component reuse more difficult Consider component composition as it is often a simpler solution than context How to pass data between components To pass data from parent to child use propsTo pass data from child to parent use callbacksTo pass data among siblings AND anywhere elseuse React s Context API alsouse state management libraries for mid big sized applications that are stateful Example Redux MobX and Recoil What are some limitations of React First JSX can make the coding complex It will have a steep learning curve for the beginnersSecond React documentation is not user friendly and thorough as it should be Third every React project are unique to engineers as they will rely on numerous technologies to incorporate in their projects What is prop drilling and how can you avoid it Prop Drilling is the process by which data is passed from one component to deeply nested components This becomes a problem as other components will contain data that they don t need Also It will make the components hard to maintain A common approach to avoid prop drilling is to use React context and state management libraries Few disadvantage of prop drillingComponents that should not otherwise be aware of the data become unnecessarily complicated Harder to maintain What is the use of dangerouslySetInnerHTML This property is React s replacement for using innerHTML in the browser  It will render raw HTML in a component One should limit its use because it can expose users to potential cross site scripting attacks Name a few techniques to optimize React app performance First Use React Suspense and React Lazy for Lazy Loading Components This will only load component when it is needed import LazyComponent from LazyComponent const LazyComponent React lazy gt import LazyComponent Second Use React memo for Component MemoizationReact memo is a higher order component that will render the component and memoizes the result Before the next render if the new props are the same React reuses the memoized result skipping the next renderingimport React from react const MyComponent React memo props gt render only if the props changed Note If React memo has a useState  useReducer or useContext Hook in its implementation it will still re render when state or context change The more often the component renders with the same props the heavier and the more computationally expensive the output is the more chances are that component needs to be wrapped in React memo Third Use React Fragment to Avoid Adding Extra Nodes to the DOM React Fragments do not produce any extra elements in the DOM Fragment s child components will be rendered without any wrapping DOM node  This is a cleaner alternative rather than adding divs in the code function App return lt React Fragment gt lt h gt Best App lt h gt lt p gt Easy as pie lt p gt lt React Fragment gt You can also use the short syntax  lt gt lt gt  for declaring a Fragment function App return lt gt lt h gt Best App lt h gt lt p gt Easy as pie lt p gt lt gt Fourth Use Reselect Re reselect in Redux to Avoid Frequent Re render Reselect is a library for building memoized selectors that is commonly used for redux AdvantagesSelectors can compute derived data allowing Redux to store the minimal possible state Selectors are efficient A selector is not recomputed unless one of its arguments changes Selectors are composable They can be used as input to other selectors Re reselect is a lightweight wrapper around Reselect to enhance selectors with deeper memoization and cache management Useful to Retain selector s cache when sequentially called with one few different argumentsJoin similar selectors into oneShare selectors with props across multiple component instancesInstantiate selectors on runtimeEnhance reselect with custom caching strategiesLast Use Production BuildEnsure that application is bundled for production before deploying What is reconciliation When a component s props or state change React decides whether an actual DOM update is necessary by comparing the newly returned element with the previously rendered one When they are not equal React will update the DOM This process is called reconciliation What are Higher Order Components A higher order component HOC is an advanced technique in React for reusing component logic  It is a function that takes a component and returns a new component const EnhancedComponent higherOrderComponent WrappedComponent HOCs are common in third party React libraries such as Redux s connect and Relay s createFragmentContainer HOC can be used for many use cases Conditionally rendering components Providing components with specific styles Give other components any props Showing a loader while a component waits for data What is children prop It is a prop that allow us to pass components as data to other components just like any other prop Component tree between the component s opening tag and closing tag will be passed to that component as children prop const MyComponent title children gt return lt gt lt h gt title lt h gt children lt gt import MyComponent from MyComponent const App gt return lt MyComponent title “Simple React App gt lt h gt Very Kewl Feature lt h gt lt MyComponent gt How to pass a parameter to an event handler or callback You can use an arrow function to wrap around an event handler and pass parameters lt button onClick gt this handleClick id gt You can also pass arguments to a function which is defined as arrow functionconst handleClick id gt gt console log The id is id lt button onClick this handleClick id gt Why do we need to pass a function to setState setState is an asynchronous operation React batches state changes for performance reasons This means state may not change immediately after setState is called We should not rely on the current state when calling setState since we can t be sure what that state will be Wrong this setState counter this state counter The solution is to pass a function to setState with the previous state as an argument Correct this setState prevState props gt counter prevState counter props increment Feel free to bookmark even if you don t need this for now You may need to refresh review down the road when it is time for you to look for a new role If you want to support me Buy Me A CoffeeVideo Format	2021-12-26 07:36:44
海外ニュース	Japan Times latest articles	Snow pummels Sea of Japan coast as weather agency warns more is on the way	https://www.japantimes.co.jp/news/2021/12/26/national/snowfall-sea-of-japan/	Snow pummels Sea of Japan coast as weather agency warns more is on the wayThe Meteorological Agency predicts snow and blizzard conditions will continue until Tuesday with up to centimeters of snow projected to fall in some regions	2021-12-26 16:30:51
海外ニュース	Japan Times latest articles	Fukuoka reports suspected community-acquired omicron case	https://www.japantimes.co.jp/news/2021/12/26/national/fukuoka-omicron/	Fukuoka reports suspected community acquired omicron caseThe Fukuoka government will begin offering free coronavirus screenings at five locations in the prefecture from Sunday for anyone hoping to get tested	2021-12-26 16:14:11
ニュース	BBC News - Home	South Africa's Archbishop Desmond Tutu dies at 90	https://www.bbc.co.uk/news/world-africa-59793726?at_medium=RSS&at_campaign=KARANGA	africa	2021-12-26 07:35:49
ニュース	BBC News - Home	Ashes: England's batting crumbles again as Australia dominate day one of Boxing Day Test	https://www.bbc.co.uk/sport/cricket/59792160?at_medium=RSS&at_campaign=KARANGA	Ashes England x s batting crumbles again as Australia dominate day one of Boxing Day TestEngland s batting capitulates again as Australia s dominance of the Ashes series continues on day one of the third Test in Melbourne	2021-12-26 07:56:23
ニュース	BBC News - Home	Obituary: Desmond Tutu - South Africa's rebellious priest	https://www.bbc.co.uk/news/world-africa-22292744?at_medium=RSS&at_campaign=KARANGA	africa	2021-12-26 07:08:05
ニュース	BBC News - Home	The Ashes: James Anderson dismisses David Warner for 38 with Zak Crawley catch	https://www.bbc.co.uk/sport/av/cricket/59793519?at_medium=RSS&at_campaign=KARANGA	The Ashes James Anderson dismisses David Warner for with Zak Crawley catchWatch as England s James Anderson claims his first wicket of the third Ashes Test by dismissing David Warner for by way of a Zak Crawley catch in Melbourne	2021-12-26 07:37:27
北海道	北海道新聞	世界の超富裕層１％、４割を独占　コロナ影響、格差拡大に拍車	https://www.hokkaido-np.co.jp/article/627720/	格差拡大	2021-12-26 16:21:00
北海道	北海道新聞	有馬記念はエフフォーリアが優勝　引退のクロノジェネシスは３着	https://www.hokkaido-np.co.jp/article/627718/	有馬記念	2021-12-26 16:20:08
北海道	北海道新聞	サーブ製プロペラ機が引退　札幌・丘珠、航空機ファンに人気	https://www.hokkaido-np.co.jp/article/627717/	鋭角	2021-12-26 16:18:20