投稿時間:2022-10-28 10:14:19 RSSフィード2022-10-28 10:00 分まとめ(16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	ビックカメラ千葉駅前店が日本酒ソムリエAI「KAORIUM for Sake」を設置 “今日の気分”にぴったりなお酒を提案	https://robotstart.info/2022/10/28/kaorium-sake-bic-camera.html		2022-10-28 00:00:10
IT	ITmedia 総合記事一覧	[ITmedia エグゼクティブ] パナソニック、売り上げ規模100億円目標　家電メーカーがサブスクで攻勢	https://mag.executive.itmedia.co.jp/executive/articles/2210/28/news082.html	itmedia	2022-10-28 09:29:00
IT	ITmedia 総合記事一覧	[ITmedia News] Amazon、増収増益だがホリデーシーズンの予測は控えめ	https://www.itmedia.co.jp/news/articles/2210/28/news080.html	amazon	2022-10-28 09:10:00
IT	情報システムリーダーのためのIT情報専門サイト IT Leaders	BIPROGY、経理に特化したAI-OCR「Robota」を販売、勘定科目を自動抽出 | IT Leaders	https://it.impress.co.jp/articles/-/23971	aiocr	2022-10-28 09:30:00
AWS	lambdaタグが付けられた新着投稿 - Qiita	【C++】 Lambda関数のimutableとは?	https://qiita.com/minh33/items/cf5f5d3ca1c2db7e35b3	default	2022-10-28 09:14:14
AWS	lambdaタグが付けられた新着投稿 - Qiita	Python メモ：for文で動的にlambda式を使う	https://qiita.com/t-funahashi/items/80b5b3953990bd26a6b2	lambda	2022-10-28 09:08:52
デザイン	コリス	デザインのアイデア出しに困った時に！ キーワードからデザイン要素やテクニックに展開させるデザイン書 -ひらめきデザインひき出し帖	https://coliss.com/articles/book-review/isbn-9784297130060.html	続きを読む	2022-10-28 00:36:04
技術ブログ	Developers.IO	Amazon QuickSight で SPICE データセットの暗号化に KMS のカスタマーマネージドキーが指定出来るようになりました	https://dev.classmethod.jp/articles/amazon-quicksight-spice-kms-cmk/	spice	2022-10-28 00:42:34
技術ブログ	Developers.IO	[レポート]中国系地下カードショップ環境の理解によるフィッシングマスターへの道 – CODE BLUE 2022 #codeblue_jp	https://dev.classmethod.jp/articles/codeblue-2022-day2-track1-0900/	codeblue	2022-10-28 00:41:36
海外TECH	DEV Community	Get Started with ReactJS: A Beginner's Guide	https://dev.to/moses619/get-started-with-reactjs-a-beginners-guide-2hnn	Get Started with ReactJS A Beginner x s Guide What is React React is a JavaScript library for building user interfaces It is maintained by Facebook and a community of individual developers and companies React can be used as a base in the development of single page or mobile applications React allows developers to create large web applications that can change data without reloading the page The goal of React is to provide a way to create fast web applications that are scalable React is a JavaScript library for building user interfaces The Benefits of ReactReact is known for its speed scalability and simplicity The main benefit of React is its performance React is able to handle large amounts of data quickly and efficiently This makes React a good choice for developing large scale applications It s declarative syntax makes code easy to read and maintain while its virtual DOM ensures fast performance React is also well suited for large applications with complex data structures Here are some other advantages of React that make it a great choice for web development JSX makes templating easier and more conciseIt lets you create reusable components so that your code is easy to read and maintain React js is advantageous because of its simplicity flexibility and scalability Additionally working with the Reactjs framework helps to improve team collaboration and communication React can be used for creating single page applications It s declarative React makes it painless to create interactive UIs Design simple views for each state in your application and React will efficiently update and render just the right components when your data changes React JSXReact is unique because it uses a declarative paradigm and JavaScript syntax extension called JSX This makes code more readable and helps make development easier JSX is a syntax extension for React that allows you to write markup directly in your JavaScript code const myElement lt h gt I Love JSX lt h gt const root ReactDOM createRoot document getElementById root root render myElement Without JSX const myElement React createElement h I do not use JSX const root ReactDOM createRoot document getElementById root root render myElement JSX is an XML like syntax extension to ECMAScript without any defined semantics It s NOT intended to be implemented by engines or browsers It s NOT a specification It s intended to be used by various preprocessors transpilers to transform these tokens into standard ECMAScript JSX is a syntax extension of JavaScript that lets you write HTML like syntax within your JavaScript code With React you can use either regular JavaScript or JSX React Components React Class ComponentReact class components are one of the ways that you can create React components They are created by extending the React Component class In a React class component you will need to create a render method The render method will return a React element When creating a class component you need to extend the React Component class This gives your component the ability to have state and lifecycle methods Class components are also easy to test because they are just JavaScript classes They allow you to use JavaScript classes to create React components Class components are more powerful than functional components and they can have state They make it easy to create reusable code and they are great for working with larger applications React introduced official support for class components in version Class components are a more traditional way of writing React components using a class They can be used with React s new context API and static getDerivedStateFromProps lifecycle methods Class components should be used when you need to use one of these features or the other capabilities unique to classes such as local state or access to lifecycle methods class Welcome extends React Component render return lt h gt Hello this props name lt h gt React Function ComponentFunction components are a simpler way to write React components They are equivalent to stateless functional components in React Simply put function components are functions that return React elements When you need a component that doesn t have state you can use a function component A function component is a simple functional unit used to create React components It accepts props and returns a React element When you create a React component you have the option of either creating a function component or a class component A function component is a React component that is written as a JavaScript function Function components are simpler than class components and they are often used for presentational components function Welcome props return lt h gt Hello props name lt h gt React PropsReact Props provide a way for a parent component to pass data to a child component The child component can then access that data via the this props object React Props are also used to specify the behavior of a component such as whether it should be rendered or not React props are pieces of data that are passed into React components They re used to customize the behavior of a component and they can be used in conjunction with state to manage the data within a component React props are immutable meaning they can t be changed once they re set This makes them perfect for passing data down the component tree and it helps to keep your components modular and easy to reason about function Person props return lt h gt I m props name lt h gt function Greeting const name Jesse return lt gt lt h gt Hello lt h gt lt Person name name gt lt gt const root ReactDOM createRoot document getElementById root root render lt Greeting gt React StateReact state is one of the most important concepts in React It refers to the data that a React component needs in order to render itself Creating the state ObjectThe state object is initialized in the constructor class Car extends React Component constructor props super props this state brand Ford render return lt div gt lt h gt My Car lt h gt lt div gt React state can be used to store data that a component needs in order to render itself When a component s state changes the component will re render itself There are two ways to change a component s state setState and forceUpdate class Car extends React Component constructor props super props this state brand Ford model Mustang color red year changeColor gt this setState color blue render return lt div gt lt h gt My this state brand lt h gt lt p gt It is a this state color this state model from this state year lt p gt lt button type button onClick this changeColor gt Change color lt button gt lt div gt React setState is a function used to update the state of a React component The function takes two arguments the first being an object containing the new state values and the second being a callback function The callback function is executed after the new state values have been applied The new state values are merged with the previous state values React forceUpdate is a function that causes a component to re render This can be useful if you need to make a change to a prop or state that will cause the component to look different forceUpdate will not call shouldComponentUpdate so it is not suitable for all situations Use it sparingly class App extends React Component constructor super this state message Hello World this updateSetState this updateSetState bind this updateSetState this setState message It is a beautiful day render return lt div gt lt h gt this state message lt h gt lt button onClick this updateSetState gt SET lt button gt lt div gt In the example above the data displayed is updated from Hello World to It is a beautiful day on button clickWhen a developer wants to update the view in React they call the forceUpdate function This function tells React that the component needs to be re rendered When the forceUpdate function is called React will re render the component even if the component s props or state haven t changed The forceUpdate function is used when a change happens outside of the component such as an event listener firing or a request from an API returning data React state is a powerful concept that allows developers to easily manage data within their React applications By using state developers can create complex applications that are responsive to user input and can change over time React state is easy to use and can be a great way to improve the performance of your application Rendering a React ComponentIn order to display a React component you must first render the component This simply means that you need to output the correct HTML code from your React component so that it can be displayed in the browser The process of rendering a React component is actually quite simple First you create a new React element This element can be either a DOM element or a custom React component lt div id root gt lt div gt Once you have created your element you use the ReactDOM This library will allow you to render your React component into an HTML element on the page const root ReactDOM createRoot document getElementById root const element lt h gt Hello world lt h gt root render element Once you have rendered your component you can then interact with it using the ReactDOM API Updating a Rendered React ComponentIn the past when a React component was rendered it was static Once rendered the component couldn t be changed This made it difficult to update components that needed to change based on user interaction or new data However now there is a way to update a rendered React component By using the setState method a developer can change the component after it has been rendered This makes it possible to create dynamic and interactive user interfaces with React When building applications with React it is important to be able to update a rendered component There are two ways to do this with the component s state or props Updating the state of a component will cause the component to re render and updating the props of a component will cause the component to update class App extends Component constructor props super props Set initial state this state greeting Click the button to receive greetings Binding this keyword this updateState this updateState bind this updateState Changing state this setState greeting GeeksForGeeks welcomes you render return lt div gt lt h gt Greetings Portal lt h gt lt p gt this state greeting lt p gt Set click handler lt button onClick this updateState gt Click me lt button gt lt div gt In order to update a rendered React component you will need to use the setState method This method will take in an object that contains the new data that you want to update the component with Once you have updated the component s state the component will re render with the new data If you need to make a API call in order to fetch new data you can do so inside of the setState method ConclusionIn conclusion ReactJS is a great tool for building user interfaces It is fast efficient and easy to learn If you are looking for a way to get started with ReactJS this guide is a great place to start	2022-10-28 00:45:34
海外科学	NYT > Science	G.O.P. Senator’s Report on Covid Origins Suggests Lab Leak, but Offers Little New Evidence	https://www.nytimes.com/2022/10/27/science/covid-lab-leak-burr-report.html	G O P Senator s Report on Covid Origins Suggests Lab Leak but Offers Little New EvidenceThe report signed by Senator Richard Burr foreshadows a new wave of political wrangling over Covid s origins if Republicans gain control of the House or Senate	2022-10-28 00:13:58
金融	ニッセイ基礎研究所	中国経済の現状と2023年の注目点－新指導部はどんな財政・金融・コロナ政策を打ち出すのか	https://www.nli-research.co.jp/topics_detail1/id=72811?site=nli	ワクチン接種が億回を超え、飲み薬の供給にもメドが立ってきたこと、年月にldquoダイナミック・ゼロ动态清零rdquoと呼ぶようになり、それまでのゼロコロナ政策を軌道修正し始めたこと、感染症対策の第一人者鍾南山氏がゼロコロナ政策の長期継続に否定的見解を示したこと、復旦大学などの研究チームが高齢者のワクチン接種率を引き上げ、抗ウイルス療法を推進し、マスク着用など厳格な非医療介入を行なえば、死亡者を平年のインフルエンザで発生する万人程度に抑えられると指摘したこと、そして何より世界のほとんどの国がウィズコロナ政策に移行する中で、中国だけがゼロコロナ政策を堅持すればldquo鎖国状態rdquoに陥る恐れがあることである。	2022-10-28 09:59:08
ニュース	BBC News - Home	'I wouldn't bring a member of my family to this hospital,' says medic	https://www.bbc.co.uk/news/health-63205305?at_medium=RSS&at_campaign=KARANGA	winter	2022-10-28 00:20:09
ニュース	BBC News - Home	Asian Network turns 20: 'A safe space for British Asians'	https://www.bbc.co.uk/news/newsbeat-63405757?at_medium=RSS&at_campaign=KARANGA	network	2022-10-28 00:32:54
マーケティング	MarkeZine	2022年はCTV広告拡大の転換点だった。Googleに聞く、YouTube CTV広告の概況	http://markezine.jp/article/detail/40346	すでに多くの企業がYouTube広告を活用していることを考えると、YouTubeCTV広告はCTV広告の中でも比較的トライしやすい広告面と言えるかもしれない。	2022-10-28 09:30:00
マーケティング	AdverTimes	第70回日経広告賞、大賞は丸紅×『ONE PIECE』コラボ広告	https://www.advertimes.com/20221028/article399733/	onepiece	2022-10-28 00:09:17