投稿時間:2023-03-02 19:37:25 RSSフィード2023-03-02 19:00 分まとめ(48件)

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IT	ITmedia 総合記事一覧	[ITmedia Mobile] AmazonのOPPOのスマホやタブレットがセール　「OPPO Reno7 A」は3万1980円に	https://www.itmedia.co.jp/mobile/articles/2303/02/news162.html	amazoncojp	2023-03-02 18:21:00
IT	ITmedia 総合記事一覧	[ITmedia Mobile] Xiaomi、Amazonの新生活セールに参加　「Redmi Note 11」や「Xiaomi 11T Pro」などが対象	https://www.itmedia.co.jp/mobile/articles/2303/02/news163.html	amazon	2023-03-02 18:21:00
IT	ITmedia 総合記事一覧	[ITmedia ビジネスオンライン] “即完”必至のワイン「Y by YOSHIKI」新ヴィンテージが発売　YOSHIKIに聞くヒットの理由	https://www.itmedia.co.jp/business/articles/2303/02/news059.html	ITmediaビジネスオンライン“即完必至のワイン「YbyYOSHIKI」新ヴィンテージが発売YOSHIKIに聞くヒットの理由XJAPANのYOSHIKIと、ナパ・ヴァレーのワイン醸造家代目のロブ・モンダヴィJrがコラボしたワイン「YbyYOSHIKI」の新ヴィンテージシリーズが月日に発売。	2023-03-02 18:20:00
IT	ITmedia 総合記事一覧	[ITmedia News] レンタルサーバ「ConoHa」にゲーム特化プラン　「マイクラ」「ARK」などのマルチプレイ用に提供	https://www.itmedia.co.jp/news/articles/2303/02/news161.html	conoha	2023-03-02 18:09:00
IT	ITmedia 総合記事一覧	[ITmedia News] Wordの文字を大きくできるショートカットは「Ctrl＋○」	https://www.itmedia.co.jp/news/articles/2303/02/news160.html	itmedianewsword	2023-03-02 18:07:00
TECH	Techable（テッカブル）	パナソニックコネクト、i-PROのAIによる状態変化検知アプリケーションの取扱い開始。商品棚モニタリングや防犯に活用可能	https://techable.jp/archives/198309	株式会社	2023-03-02 09:00:56
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	象印マホービン、基幹系システムからワークフローを自動起票、取引価格の申請・承認を効率化 | IT Leaders	https://it.impress.co.jp/articles/-/24523	象印マホービン、基幹系システムからワークフローを自動起票、取引価格の申請・承認を効率化ITLeaders象印マホービン本社大阪府大阪市は、営業担当者が取引価格などを申請して承認を受ける業務を効率化するため、基幹系システムのデータと連携したワークフローシステムを稼働開始した。	2023-03-02 18:11:00
python	Pythonタグが付けられた新着投稿 - Qiita	Windows&VSCodeでAnaconda環境をフルで使う環境構築	https://qiita.com/shiganai/items/cc2c0a0e9b6feea11c04	anaconda	2023-03-02 18:22:23
python	Pythonタグが付けられた新着投稿 - Qiita	mplfinanceを使ってロウソク足を表示させる	https://qiita.com/__x__/items/7d461042b138796664c6	colaboratorymplfinance	2023-03-02 18:13:24
js	JavaScriptタグが付けられた新着投稿 - Qiita	React Queryってなんぞや	https://qiita.com/kyon-00/items/cc5219bc7b1608ccda46	react	2023-03-02 18:40:55
js	JavaScriptタグが付けられた新着投稿 - Qiita	paizaラーニング レベルアップ問題集 DPメニュー JavaScript 最安値を達成するには 2	https://qiita.com/ZampieriIsa/items/f3e20adaf47e258911a3	javascript	2023-03-02 18:35:52
js	JavaScriptタグが付けられた新着投稿 - Qiita	paizaラーニング レベルアップ問題集 DPメニュー JavaScript 【最安値】最安値を達成するには 4	https://qiita.com/ZampieriIsa/items/bd0ebe28e4a891c1148d	javascript	2023-03-02 18:10:35
Ruby	Rubyタグが付けられた新着投稿 - Qiita	[個人開発]アイデア募集・投稿アプリ	https://qiita.com/sasaki2931/items/08a113905263c594ad17	qiita	2023-03-02 18:50:28
Ruby	Rubyタグが付けられた新着投稿 - Qiita	SSL_connect returned=1 errno=0 state=error: certificate verify failed	https://qiita.com/yuuki_satou/items/28108b4bd56649616250	certificateverifyfailed	2023-03-02 18:39:13
Azure	Azureタグが付けられた新着投稿 - Qiita	Private Endpoint が有効な(パブリックネットワークアクセスが無効な) App Service に デプロイを行う方法　その 3	https://qiita.com/georgeOsdDev@github/items/9d9a2a16e0fefc44d53b	appservice	2023-03-02 18:37:23
Azure	Azureタグが付けられた新着投稿 - Qiita	Azure Administrator(AZ-104)：Azure でのストレージの実装と管理「BLOBコンテナ」	https://qiita.com/fsd-jume/items/51fbb65ce4076c2caf7e	azureadministratoraz	2023-03-02 18:22:50
Azure	Azureタグが付けられた新着投稿 - Qiita	Azure から外部へ通信を行うための許可 URL まとめ	https://qiita.com/hisnakad/items/5a9f8157f62b959bc4be	azure	2023-03-02 18:13:40
Ruby	Railsタグが付けられた新着投稿 - Qiita	[個人開発]アイデア募集・投稿アプリ	https://qiita.com/sasaki2931/items/08a113905263c594ad17	qiita	2023-03-02 18:50:28
Ruby	Railsタグが付けられた新着投稿 - Qiita	SSL_connect returned=1 errno=0 state=error: certificate verify failed	https://qiita.com/yuuki_satou/items/28108b4bd56649616250	certificateverifyfailed	2023-03-02 18:39:13
技術ブログ	Developers.IO	[Security Hub修復手順][ELB.7] Classic Load Balancers は、Connection Draining を有効にする必要があります	https://dev.classmethod.jp/articles/securityhub-fsbp-remediation-elb-07/	awssecurityhub	2023-03-02 09:29:30
技術ブログ	Developers.IO	AWS 환경의 재해 복구 계획(DR)에 대해	https://dev.classmethod.jp/articles/about-disaster-recovery-plans-in-aws-environments-kr/		2023-03-02 09:11:13
海外TECH	DEV Community	I made an admin dashboard for React using Tailwind CSS! Use it for free! ⚡️	https://dev.to/fredy/i-made-an-admin-dashboard-for-react-using-tailwind-css-use-it-for-free-49o	I made an admin dashboard for React using Tailwind CSS Use it for free ️Hey guys I made an admin template for React using Tailwind CSS Use it for free Presentation Live demo Download on Github	2023-03-02 09:55:53
海外TECH	DEV Community	Build a ToDo App With React and Firebase	https://dev.to/devland/build-a-todo-app-with-react-and-firebase-47m1	Build a ToDo App With React and FirebaseIn today s fast paced world keeping track of our daily tasks and responsibilities is more important than ever Whether you re a student a professional or a homemaker having a reliable task management system can help you stay organized and focused on what matters most One way to achieve this is by using a ToDo application In this article I will guide you through the process of building a ToDo list app using React with the data stored in the backend specifically in a Firebase Firestore database The ToDo List app will allow users to enter a Todo item and store it in a lovely list in the firebase database So this list will be permanent and won t be changed after a refresh of the browser Users can also delete it The topics covered in this article include the following Using a React useRef hook Storing data in a Firebase Firestore database Using MUI icons and componentsAnd much more OverviewThe final result will look like this Project folders structureAs we go through the implementation of our application we will end up with the following folder structure containing files Initializing React applicationTo get started use the create react app command to create a new app called todo app Specifically the command for this is as follows npx create react app todo app Initializing FirebaseBefore setting up Firebase let us talk a bit about it Firebase is a set of tools developed by Google that provided backend service It contains a variety of services such as Cloud Firestore Real time cloud hosted NoSQL databaseCloud storage Massively scalable file storageCloud functions Serverless event driven back end functionsAuthentication User login and identityFirebase hosting Global web hostingML Kit An SDK for common machine learning tasksFirebase makes life so easy for Front end developers to integrate a backend into their application without creating any API routes or other backend code So we will use the cloud Firestore to store data in it Now go to Firebase website and create a new account Create a new project by clicking add project After this click on Continue to the console button Scroll down and click the config radio button and then copy all the data for the firebase config section Now inside the src folder create a file called firebase js and add paste the copied code to it This code will look like this firebase jsconst firebaseConfig apiKey long random key authDomain default domain of your app projectId name project id storageBucket storage bucket messagingSenderId messageSenderId appId random key measurementId random key Basic React SetupNow we will do basic setup for React Inside the ToDo app directory delete all unnecessary files So our index js and App js files look like this src index jsimport React from react import ReactDOM from react dom import index css import App from App ReactDOM render lt React StrictMode gt lt App gt lt React StrictMode gt document getElementById root src App jsfunction App return lt div className App gt lt h gt TODO List App lt h gt lt div gt export default App Local ToDo ListAfter doing the setup in the previous section we will work on our ToDo app We will update our App js file to contain the logic for a basic ToDo list Here we are using two state variables todos and input We are using the useState hook to declare both of them todos contains an array containing two strings and input contains an empty string Next inside the return statement we use the controlled input of React to update the input of an input box Next we have a button and a click event assigned to the button When we click it we will run a function called addTodo that changes the state of todos with setTodos Here it appends the already existing content with the user typed content We are using a form to wrap our input and button and the button type is submitted Therefore if we type anything in the input box and press Enter on the keyboard it will work For creating the user interface of our app we will use a pre build components library MUI MUI formerly called Material UI is a React component Library developed by Google in that offers accessible robust production ready customizable and reusable code components for faster web development It uses grid based layouts animations transitions padding and many more It also specifies a large set of standard icons Let s install it by using this command npm install mui icons materialnpm install mui material emotion react emotion styledAll we have said in the previous line is resumed by the following code import React useState from react import TextField Button from mui material import App css function App const todos setTodos useState Create Blockchain App Create a Youtube Tutorial const input setInput useState const addTodo e gt e preventDefault setTodos todos input setInput return lt div className App gt lt h gt TODO List App lt h gt lt form gt lt TextField id outlined basic label Make Todo variant outlined style margin px px size small value input onChange e gt setInput e target value gt lt Button variant contained color primary onClick addTodo gt Add Todo lt Button gt lt form gt lt ul gt todos map todo gt lt li gt todo lt li gt lt ul gt lt div gt export default App Now run the app in your terminal npm run startIt looks like this ToDo ComponentsNext we will move the ToDo list to a separate component So create a file named Todo js inside a component folder We will send the separate ToDo to it as a props The updated code is shown as import React useState from react import TextField Button from mui material import Todo from components Todo import App css function App const todos setTodos useState Create Blockchain App Create a Youtube Tutorial const input setInput useState const addTodo e gt e preventDefault setTodos todos input setInput return lt div className App gt lt h gt TODO List App lt h gt lt form gt lt TextField id outlined basic label Make Todo variant outlined style margin px px size small value input onChange e gt setInput e target value gt lt Button variant contained color primary onClick addTodo gt Add Todo lt Button gt lt form gt lt ul gt todos map todo gt lt Todo todo todo gt lt ul gt lt div gt export default App Now add the following code into the Todo js file We are just using a bunch of mui icons and showing the props called todo These icons help us to make the list item prettier src components Todo jsimport List ListItem ListItemAvatar ListItemText from mui material const Todo todo gt return lt List className todo list gt lt ListItem gt lt ListItemAvatar gt lt ListItemText primary todo secondary todo gt lt ListItem gt lt List gt export default Todo Run our app now it looks like this Now it s time to hook up Firebase to the project We will start setting up Firebase for the backend For that install all the necessary dependencies npm install firebaseUpdate our firebase js file to use the config to initialize the app After that we will use Firestore as the database import initializeApp from firebase app import getFirestore from firebase firestore const firebaseConfig const firebaseApp initializeApp firebaseConfig const db getFirestore firebaseApp export db Now we will go back to Firebase and click Cloud Firestore and then click the Create database button as shown in following picture On the next screen select Start in test mode and then click the Next button as shown On the next screen click the Enable button On the next screen click Start collection as shown in following picture It will open the pop up shown in the following picture We need to enter todos in the Collection ID field and click the Next button On the next screen fill the Document ID field by clicking Auto ID Also enter todo in the Field choose string for the type and add a random text in the value field After that click the Save button That will take us back to the main screen Adding Firebase to the AppNow we are going to use the data from Firebase database So remove the hard coded stuff in the useState code for todos After that within useEffect we are calling the collection todos and then we take the snapshot In Firebase terms it is the live data which we will get instantly We will then set this data in the todos array via setTodos Also notice that useEffect has input inside the array So any time a todo is added by the user it will instantly display in our app Notice that we have changed the way we loop through data using todos This is done because we receive the data as an array of objects Updated code src App jsimport React useState useEffect from react import TextField Button from mui material import Todo from components Todo import db from firebase js import collection onSnapshot from firebase firestore import App css function App const todos setTodos useState const input setInput useState useEffect gt onSnapshot collection db todos snapshot gt setTodos snapshot docs map doc gt doc data input const addTodo e gt e preventDefault setTodos todos input setInput return lt div className App gt lt h gt TODO List App lt h gt lt form gt lt TextField id outlined basic label Make Todo variant outlined style margin px px size small value input onChange e gt setInput e target value gt lt Button variant contained color primary onClick addTodo gt Add Todo lt Button gt lt form gt lt ul gt todos map todo gt lt Todo todo todo gt lt ul gt lt div gt export default App Now we will add the functionality so the user can add the ToDo item For that we just need to add the input to the collection using addDoc Also notice that we are adding the server timestamp while adding a ToDo We are doing this because we need to order the ToDos in descending order The resulted code looks like this src App jsimport React useState useEffect from react import TextField Button from mui material import Todo from components Todo import db from firebase import collection onSnapshot serverTimestamp addDoc from firebase firestore import App css function App const todos setTodos useState const input setInput useState useEffect gt onSnapshot collection db todos snapshot gt setTodos snapshot docs map doc gt doc data input const addTodo e gt e preventDefault addDoc collection db todos todo input timestamp serverTimestamp setInput return lt div className App gt lt div gt export default App Now we need to get the ID of each item that we require for the key and also for deleting which we are going to implement The key is essential in React for optimization and we also get a warning in the console So we need to change the structure in which we set the data in setTodos src App jsimport React useState useEffect from react import TextField Button from mui material import Todo from components Todo import db from firebase js import collection query orderBy onSnapshot addDoc serverTimestamp from firebase firestore import App css const q query collection db todos orderBy timestamp desc function App const todos setTodos useState const input setInput useState useEffect gt onSnapshot q snapshot gt setTodos snapshot docs map doc gt id doc id item doc data input const addTodo e gt e preventDefault addDoc collection db todos todo input timestamp serverTimestamp setInput return lt div className App gt lt h gt TODO List App lt h gt lt form gt lt TextField id outlined basic label Make Todo variant outlined style margin px px size small value input onChange e gt setInput e target value gt lt Button variant contained color primary onClick addTodo gt Add Todo lt Button gt lt form gt lt ul gt todos map item gt lt Todo key item id arr item gt lt ul gt lt div gt export default App Delete functionalityNext we will add the delete functionality in which we will have to get the ID of the item and call the deleteDoc The updated code looks like this src Todo jsimport List ListItem ListItemAvatar ListItemText from mui material import DeleteIcon from mui icons material Delete import db from firebase js import doc deleteDoc from firebase firestore const Todo arr gt return lt List className todo list gt lt ListItem gt lt ListItemAvatar gt lt ListItemText primary arr item todo secondary arr item todo gt lt ListItem gt lt DeleteIcon fontSize large style opacity onClick gt deleteDoc doc db todos arr id gt lt List gt export default Todo Now open your terminal and run the application Our app is now fully functional but the design looks awful So we need to add some styles Create a file called todo css and imports it to the Todo js file with the following styles todo list display flex justify content center align items center width px border px solid lightgray margin bottom px important Replace all the styles in the App css with the following App display grid place items center Run the application now it looks much nicer ConclusionNow that our Todo application can save its data in Firestore database we can think about the next phase about making this a real application namely authenticating our users But to make this article as simple as possible we will not implement that functionality Make it in your way I would be happy to see the final result THANK YOU FOR READING I hope you found this little article helpful Please share it with your friends and colleagues Sharing is caring Connect with me on Twitter or LinkedIn to read more about JavaScript React Node js and more… Want to work together Contact me on Upwork	2023-03-02 09:36:40
海外TECH	DEV Community	Cloud Technology News of the Month: March 2023	https://dev.to/castai/cloud-technology-news-of-the-month-march-2023-4c7k	Cloud Technology News of the Month March Is FinOps worth the time and money Keep reading to find out what happened in the cloud world last month Story of the MonthWhen Not Automated FinOps Can End Up Eating Your SavingsWhen used correctly FinOps tooling helps teams optimize cloud resource utilization demand planning and consumption modeling  However many businesses that use manual cloud cost management tools waste far too much time tinkering As the cloud computing expert David Linthicum points out such “avoidable mistakes end up costing more money than is being saved  If you re looking to dramatically reduce your cloud costs do these two things Check the cost of services and time involved in your optimization strategy  And start using an automated cost optimization solution that minimizes the time engineers spend on manual configuration The Cloud in NumbersWhere New Data Centers GrowSource Chartr million this is the number of users ChatGPT reached in just days after launching at the end of November It took Instagram and Spotify around months and months respectively to achieve the same   million Google invested this sum in Anthropic which focuses on safety for GenML chat systems   the number of new massive data center campuses an AWS affiliated company is planning to build in Ohio that s how many data centers Northern Virginia is home to They handle a third of the world s online usage and according to the Washington Post cause a stir in the local communities which suffer due to the constant whir of the rooftop exhaust fans The Business of CloudThe Cloud Repatriation Saga ContinuesDHH is back with some more numbers about Basecamp s cloud exit The company s preliminary calculations show that they will save about million in server expenses over five years from the move without changing the size of their Ops team Let s see how this repatriation story continues when the market bounces back…Source HeyTech companies are radically cutting their vendor costs Gergely Orosz shows how these cuts are spread between infrastructure tooling cloud observability security as well as collaboration tools developer experience sales HR and recruitment Source Pragmatic EngineerGenerative AI is all the rage but all the users who generate images with DALL E or write term papers with ChatGPT consume a lot of cloud resources Who s going to pay for it And what about the environmental cost  The publication argues that companies need to step into AI development projects with a clear understanding of the costs and the impact on sustainability   Source InfoWorld Security amp OutagesKubernetes Adoption Challenges DevOps Kubernetes Benchmark Report is here and shows that DevOps struggle to manage the potential configuration risks coming from new teams adopting Ks Instead of relying on manual processes for cross checking policies teams should automate Kubernetes governance configuration and security The CAST AI Cluster Security report helps exactly in this area Source Kubernetes Benchmark ReportThis had to happen sooner or later we now have CloudGPT that promises to analyze AWS policies for vulnerabilities Consider how often ChatGPT gets things wrong before diving in Source GitHub Brought to you by CAST AICAST AI automates Kubernetes cost performance and security management for hundreds of companies of all sizes The platform delivers over cost savings for its clients without requiring months of onboarding to see the results    This series explores the most attention grabbing cloud technology news bringing you up to speed with the latest releases acquisitions research and hidden gems in cloud computing the stuff actually worth reading Get curated cloud industry news straight to your inboxA monthly roundup of the most notable things going on in the cloud industry Subscribe below and stay up to date	2023-03-02 09:28:37
海外TECH	DEV Community	React Hooks: A Comprehensive Guide for Building Scalable Web Applications	https://dev.to/crossskatee1/react-hooks-a-comprehensive-guide-for-building-scalable-web-applications-27mn	React Hooks A Comprehensive Guide for Building Scalable Web ApplicationsReact is a popular JavaScript library for building user interfaces Its component based architecture makes it easy to create reusable UI elements and manage their state However before the introduction of React Hooks managing state in functional components was limited to using the useState and useEffect methods This made it challenging to handle complex stateful logic and caused developers to use class components in many cases With the release of React Hooks reactjs developers can now use stateful logic inside functional components without the need for class components This article provides an introduction to React Hooks and demonstrates how they can simplify state management in React applications We will cover the basics of React Hooks commonly used Hooks creating custom Hooks best practices and tips for using React Hooks effectively By the end of this article you will have a solid understanding of React Hooks and be able to implement them in your own React projects The Basics of React HooksReact Hooks are functions that allow you to use state and other React features in functional components In this section we ll cover two of the most commonly used React Hooks useState and useEffect A useState HookThe useState Hook allows you to add state to a functional component It takes an initial value as an argument and returns an array with two values the current state value and a function to update the state Here s an example of using useState Hook in a functional component import React useState from react function Counter const count setCount useState return lt div gt lt p gt You clicked count times lt p gt lt button onClick gt setCount count gt Click me lt button gt lt div gt In the above code we first import the useState Hook from the React library Then we define a functional component called Counter that initializes a count state variable to using the useState Hook Inside the return statement we use the count variable to display the current count value and the setCount function to update the count state when the button is clicked B useEffect HookThe useEffect Hook allows you to perform side effects in functional components such as fetching data from an API updating the document title or subscribing to a WebSocket It takes a function as its argument which is called after the component has rendered Here s an example of using useEffect Hook in a functional component import React useState useEffect from react function Example const count setCount useState useEffect gt document title You clicked count times count return lt div gt lt p gt You clicked count times lt p gt lt button onClick gt setCount count gt Click me lt button gt lt div gt In the above code we define a functional component called Example that uses the useState Hook to initialize a count state variable to We then use the useEffect Hook to update the document title with the current count value after each render The useEffect Hook takes two arguments the first is a function that updates the document title and the second is an array of dependencies In this case we include the count variable in the dependency array to ensure that the effect is re run only when the count state changes Overall the useState and useEffect Hooks are essential for building complex stateful logic in functional components By using these Hooks we can avoid using class components and make our code simpler and easier to read Other Commonly Used React HooksIn addition to useState and useEffect there are several other Hooks that are commonly used in React applications In this section we ll cover two more Hooks useContext and useRef A useContext HookThe useContext Hook allows you to consume a value from a React context in a functional component It takes a context object as its argument and returns the current value of the context Here s an example of using useContext Hook in a functional component import React useContext from react import ThemeContext from ThemeContext function ThemeButton props const theme useContext ThemeContext return lt button style backgroundColor theme background color theme foreground props gt props children lt button gt In the above code we import the useContext Hook from the React library and a ThemeContext object from a separate file We then define a functional component called ThemeButton that consumes the current theme value from the ThemeContext using the useContext Hook The theme value is used to set the background and foreground styles of the button B useRef HookThe useRef Hook allows you to create a mutable reference to a value that persists between renders in a functional component It takes an initial value as its argument and returns a mutable object with a current property that can be updated Here s an example of using useRef Hook in a functional component import React useRef from react function TextInputWithFocusButton const inputEl useRef null const handleClick gt inputEl current focus return lt div gt lt input ref inputEl type text gt lt button onClick handleClick gt Focus the input lt button gt lt div gt In the above code we import the useRef Hook from the React library and define a functional component called TextInputWithFocusButton that uses the useRef Hook to create a mutable reference to an input element We then define a handleClick function that calls the focus method on the input element when the button is clicked Finally we render the input element with a ref attribute set to the inputEl mutable reference and a button that calls the handleClick function on click Overall the useContext and useRef Hooks are useful for managing state and data in React applications By using these Hooks we can simplify our code and make our components more efficient and readable Creating Custom React HooksIn addition to the built in Hooks provided by React it s also possible to create custom Hooks to encapsulate reusable stateful logic Custom Hooks allow you to abstract away complex logic into a single function that can be used across multiple components A Explanation of Custom React HooksCustom Hooks are essentially functions that use built in Hooks to provide additional functionality They allow you to encapsulate logic into a reusable function that can be used across multiple components Custom Hooks can help you to reduce code duplication and make your code more modular and reusable B How to Create a Custom HookCreating a custom Hook is similar to creating a regular function in React The only difference is that it must use one or more of the built in Hooks Here s an example of how to create a custom Hook import useState useEffect from react function useWindowWidth const windowWidth setWindowWidth useState window innerWidth useEffect gt function handleResize setWindowWidth window innerWidth window addEventListener resize handleResize return gt window removeEventListener resize handleResize return windowWidth In the above code we ve defined a custom Hook called useWindowWidth that uses the useState and useEffect Hooks The useWindowWidth Hook returns the current window width and updates it whenever the window is resized C Examples of Custom HooksHere are a few examples of custom Hooks that can be used in a React application useFetch HookThe useFetch Hook can be used to fetch data from an API and handle loading and error states Here s an example of how to create a useFetch Hook import useState useEffect from react function useFetch url const data setData useState null const loading setLoading useState true const error setError useState null useEffect gt async function fetchData try const response await fetch url const json await response json setData json catch error setError error finally setLoading false fetchData url return data loading error In the above code we ve defined a custom Hook called useFetch that uses the useState and useEffect Hooks The useFetch Hook fetches data from the provided URL and updates the data loading and error states accordingly useDebounce HookThe useDebounce Hook can be used to debounce a value which is useful when you want to prevent a function from being called too frequently Here s an example of how to create a useDebounce Hook import useState useEffect from react function useDebounce value delay const debouncedValue setDebouncedValue useState value useEffect gt const timeoutId setTimeout gt setDebouncedValue value delay return gt clearTimeout timeoutId value delay return debouncedValue In the above code we ve defined a custom Hook called useDebounce that uses the useState and useEffect Hooks The useDebounce Hook debounces the provided value by delaying the update for the specified amount of time Overall custom Hooks can help you to write more reusable and maintainable code in your React applications By encapsulating complex logic into a single function you can make your code more modular and easier to understand Best Practices and Tips for Using React HooksReact Hooks provide a powerful and flexible way to manage state and logic in your React components However there are certain best practices and tips that you should follow to use Hooks effectively A Rules of HooksThe Rules of Hooks are a set of guidelines that you should follow when using Hooks in your components These rules ensure that Hooks are used correctly and that your components behave predictably Here are the main rules Only call Hooks at the top level Hooks must be called at the top level of your components or custom Hooks Don t call Hooks inside loops conditions or nested functions Only call Hooks from React functions Hooks can only be called from React function components custom Hooks or other Hooks Don t call Hooks from regular JavaScript functions or class components Don t call Hooks conditionally Hooks should be called in the same order every time your component renders Don t call Hooks conditionally based on some state or props Call Hooks with the same arguments The arguments passed to a Hook should be the same every time your component renders Don t call Hooks with different arguments based on some state or props Only call Hooks from React components Hooks should only be called from React components or custom Hooks Don t call Hooks from regular JavaScript functions or event handlers B Performance ConsiderationsReact Hooks can have performance implications if they re used incorrectly Here are a few tips to keep in mind Avoid unnecessary re renders When using the useState Hook be careful not to trigger unnecessary re renders by updating state too frequently You can use the useCallback Hook to memoize functions and avoid re rendering Optimize expensive operations When using the useEffect Hook be careful not to perform expensive operations that can slow down your component You can use the useMemo Hook to memoize values and avoid re computing them on every render Use React memo You can use the React memo higher order component to memoize your components and avoid unnecessary re renders C Tips for Using Hooks EffectivelyHere are a few tips for using Hooks effectively in your React components Use multiple Hooks You can use multiple Hooks in your components to manage different aspects of your component s state and logic For example you can use the useState useEffect and useContext Hooks in a single component Use custom Hooks You can create custom Hooks to encapsulate reusable logic and make your code more modular Custom Hooks can help you to reduce code duplication and make your code more maintainable Keep Hooks small and focused When creating custom Hooks try to keep them small and focused on a specific task This will make them easier to understand and reuse Test your Hooks Just like any other code you should test your custom Hooks to ensure that they work as expected You can use testing libraries like Jest and React Testing Library to test your Hooks Overall React Hooks provide a powerful and flexible way to manage state and logic in your React components By following the Rules of Hooks optimizing performance and using Hooks effectively you can write more maintainable and performant React code ConclusionIn conclusion React Hooks are a powerful feature of React that allow developers to manage state and logic in a more concise and modular way The useState useEffect useContext and useRef Hooks are just some of the commonly used Hooks that can help you to write cleaner and more maintainable code Additionally by creating custom Hooks and following best practices like the Rules of Hooks you can further improve the quality of your code If you re looking to build complex and scalable web applications with React it s essential to hire reactjs developers who have a strong understanding of Hooks and other advanced React concepts With the help of experienced ReactJS developers you can build high performance and responsive applications that meet your business requirements React Hooks have revolutionized the way developers build React applications They provide a cleaner and more concise way to manage state and side effects making it easier to build scalable and maintainable applications At CronJ our team of ReactJS developers are experts in using React Hooks to build high performance applications that meet our clients needs References React Hooks Documentation React Libraries	2023-03-02 09:09:16
海外TECH	Engadget	Snapchat's latest feature helps you maintain your streaks if you miss one	https://www.engadget.com/snapchat-streak-restore-095639485.html?src=rss	Snapchat x s latest feature helps you maintain your streaks if you miss oneA lot of users were obsessed with keeping up Snapstreaks after they launched even maintaining streaks in the hundreds with several friends They don t seem to be as popular anymore perhaps in part because life usually gets in the way of sending Snaps to people every single day Now Snap has launched an experimental feature that could make it easier to maintain streaks by restoring them if they break Say something got in the way of sending Snap to a friend for a day users can simply tap Restore to pretend that day never happened nbsp The catch is that users will only get one free Snap Restore As TechCrunch notes if they want to prevent more Snapstreaks from going to waste they d have to buy more Restores from the app for each in the US In its announcement the company also said that it s introducing a new way for Snapchat subscribers to freeze their Streaks for long periods soon While it didn t expound on how the feature will work Snap said it will allow users to put things on pause when they know they re going off the grid These feature announcements come shortly after Snap added an OpenAI chatbot similar to ChatGPT to its app The chatbot shows up as a regular user profile probably to make it look more like a virtual friend though Snap admits it could be tricked into saying just about anything and has even apologized for its many deficiencies in advance At the moment the chatbot is exclusively available to Snapchat users paying a month for the service but the company has plans to make it more widely available nbsp This article originally appeared on Engadget at	2023-03-02 09:56:39
医療系	医療介護 CBnews	東京都の新規陽性者数7日間平均が7週間連続減少-コロナモニタリング会議、感染状況は改善傾向	https://www.cbnews.jp/news/entry/20230302183934	新型コロナウイルス	2023-03-02 18:50:00
金融	RSS FILE - 日本証券業協会	採用情報	https://www.jsda.or.jp/about/recruit/index.html	採用情報	2023-03-02 10:08:00
金融	金融庁ホームページ	入札公告等を更新しました。	https://www.fsa.go.jp/choutatu/choutatu_j/nyusatu_menu.html	公告	2023-03-02 11:00:00
金融	金融庁ホームページ	資金決済法に基づく払戻手続実施中の商品券の発行者等一覧を更新しました。	https://www.fsa.go.jp/policy/prepaid/index.html	資金決済法	2023-03-02 10:00:00
金融	金融庁ホームページ	職員を募集しています。（制度の企画及び立案等に従事する職員）	https://www.fsa.go.jp/common/recruit/r4/kikaku-15/kikaku-15.html	立案	2023-03-02 10:00:00
金融	ニッセイ基礎研究所	マイナンバーカードの今後の注目点－１月交付率は過去２番目に高い伸び	https://www.nli-research.co.jp/topics_detail1/id=74050?site=nli	年度秋に予定される健康保険証の廃止までに、この層を含めた一層の普及促進策や、マイナ保険証未取得であっても受診に支障が出ない仕組みを作る必要があり、現在、デジタル庁の「マイナンバーカードと健康保険証の一体化に関する検討会」で議論が行われている。	2023-03-02 18:02:04
海外ニュース	Japan Times latest articles	After years of sluggish growth, are wage hikes finally gaining steam in Japan?	https://www.japantimes.co.jp/news/2023/03/02/business/wage-hike-momentum-shunto/	After years of sluggish growth are wage hikes finally gaining steam in Japan While bigger firms have been more inclined to raise pay amid high inflation and a labor shortage whether or not this trend spreads to smaller	2023-03-02 18:24:50
海外ニュース	Japan Times latest articles	The paradox that is Fumio Kishida’s leadership	https://www.japantimes.co.jp/opinion/2023/03/02/commentary/japan-commentary/kishida-explained/	alternative	2023-03-02 18:40:47
ニュース	BBC News - Home	Isabel Oakeshott reveals why she leaked Matt Hancock's WhatsApp messages	https://www.bbc.co.uk/news/uk-64822872?at_medium=RSS&at_campaign=KARANGA	health	2023-03-02 09:24:15
ニュース	BBC News - Home	Constance Marten arrest: Police continue questioning after baby found	https://www.bbc.co.uk/news/uk-64815323?at_medium=RSS&at_campaign=KARANGA	gross	2023-03-02 09:32:52
ニュース	BBC News - Home	India PM Modi urges G20 foreign ministers to overcome differences	https://www.bbc.co.uk/news/world-asia-india-64796718?at_medium=RSS&at_campaign=KARANGA	ukraine	2023-03-02 09:33:57
ニュース	BBC News - Home	Charlotte Bankes & Huw Nightingale: GB pair win gold in team snowboard cross at World Championships	https://www.bbc.co.uk/sport/winter-sports/64816253?at_medium=RSS&at_campaign=KARANGA	Charlotte Bankes amp Huw Nightingale GB pair win gold in team snowboard cross at World ChampionshipsCharlotte Bankes and Huw Nightingale win Britain s first ever team snowboard cross title with gold at the World Championships Georgia	2023-03-02 09:39:25
ニュース	BBC News - Home	Everton's new stadium: Can Toffees ever be great again?	https://www.bbc.co.uk/sport/av/football/64805130?at_medium=RSS&at_campaign=KARANGA	Everton x s new stadium Can Toffees ever be great again BBC Sport visits Liverpool to sample the mood among Everton fans and followers as the Toffees prepare to move to a new stadium with Premier League survival in the balance	2023-03-02 09:13:36
ニュース	Newsweek	地上の地獄──血まみれの土地に巨大刑務所開設、エルサルバドル	https://www.newsweekjapan.jp/stories/world/2023/03/post-100996.php		2023-03-02 18:25:08
ニュース	Newsweek	シャーロット王女は普通に就職し、フルタイムで働く王族にはならない	https://www.newsweekjapan.jp/stories/world/2023/03/post-101000.php	シャーロット王女は普通に就職し、フルタイムで働く王族にはならない英王室は月日に執り行われるチャールズ世の戴冠式に向け大忙しだが、その前の月日にはシャーロット王女の歳の誕生日も控えている。	2023-03-02 18:13:12
IT	週刊アスキー	HyperX、プレミアヘッドセット「Cloud Alpha Wireless」やゲーミングキーボード「Alloy Core RGB」などがお得な「新生活キャンペーン」を実施	https://weekly.ascii.jp/elem/000/004/127/4127100/	HyperX、プレミアヘッドセット「CloudAlphaWireless」やゲーミングキーボード「AlloyCoreRGB」などがお得な「新生活キャンペーン」を実施HyperXは「新生活キャンペーン」としてAmazonでプロモーションを開始する。	2023-03-02 18:50:00
IT	週刊アスキー	アンカー、財布に収まるカード型紛失防止トラッカー「Eufy Security SmartTrack Card」	https://weekly.ascii.jp/elem/000/004/127/4127104/	ufysecuritysmarttrackcard	2023-03-02 18:45:00
IT	週刊アスキー	バッファロー、電子帳簿保存法に対応したポータブルブルーレイドライブ「BRXL-PTWOU3-BK」を販売	https://weekly.ascii.jp/elem/000/004/127/4127093/	brxlptwoubk	2023-03-02 18:40:00
IT	週刊アスキー	モスフードサービス、バックオフィス業務の効率化を支援するクラウドサービス「ジンジャー」を導入	https://weekly.ascii.jp/elem/000/004/127/4127105/	業務	2023-03-02 18:40:00
IT	週刊アスキー	東芝テック、手洗いマニュアルに沿った手洗いができているかを判定する「Visual Wash」を発売	https://weekly.ascii.jp/elem/000/004/127/4127089/	haccp	2023-03-02 18:30:00
IT	週刊アスキー	SteelSeries、PlayStation向け高級ヘッドセット「Arctis Nova Pro Wireless P」Amazon限定販売	https://weekly.ascii.jp/elem/000/004/127/4127097/	amazon	2023-03-02 18:30:00
IT	週刊アスキー	「ruinas」が新宿ミロード モザイク通りに出店！　アクセサリー70％オフ・雑貨50％オフの価格で販売	https://weekly.ascii.jp/elem/000/004/127/4127082/	ruinas	2023-03-02 18:10:00