投稿時間:2023-01-24 01:15:44 RSSフィード2023-01-24 01:00 分まとめ(25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
AWS	AWS Mobile Blog	Backends for Frontends Pattern	https://aws.amazon.com/blogs/mobile/backends-for-frontends-pattern/	Backends for Frontends PatternIn this blog post we describe how you can improve end user customer experience on your User Interfaces UI by implementing the Backend for Frontend pattern and providing real time visual updates when your microservices raise events about mutations in their domain aggregates The solution proposed combines two patterns the Backends for Frontends BFF pattern where …	2023-01-23 15:48:32
Ruby	Rubyタグが付けられた新着投稿 - Qiita	【RSpec】Parallel(in_processes)の中のメソッドをモックする	https://qiita.com/_okina/items/d21390a6db677ee7396e	inprocesses	2023-01-24 00:17:51
Linux	Ubuntuタグが付けられた新着投稿 - Qiita	EPGStation で WebAPI を使って余分な TS ファイルを削除	https://qiita.com/nanbuwks/items/bab77ef5c61b5e74c905	epgstation	2023-01-24 00:50:21
Docker	dockerタグが付けられた新着投稿 - Qiita	GitHub ActionsからFly.ioにデプロイしようとして失敗する場合の解決方法	https://qiita.com/takagimeow/items/396d5c535b9eb2142da6	deploypro	2023-01-24 00:00:40
技術ブログ	Developers.IO	Rescript로 React 사용해보기	https://dev.classmethod.jp/articles/rescript-react-first-time/	Rescript로React 사용해보기Rescript라는언어가있다 Typescript로Javascript에타입을추가해사용하듯이 Rescript는함수형언어로써Javascript를사용할수있게해준다 Rescrip	2023-01-23 15:41:05
海外TECH	DEV Community	Use ChatGPT to "talk" to your website	https://dev.to/polterguy/use-chatgpt-to-talk-to-your-website-52nb	Use ChatGPT to quot talk quot to your websiteWe ve just released a new version of Aista Magic Cloud The primary feature in this release is that it allows you to copy and paste a JavaScript tag into your existing website for then to have an intelligent conversation with your website based upon ChatGPT and AI Notice you need to fine tune your own model but this is automatically done for you by simply pointing Magic to your existing website at which point it will automagically crawl your website and scrape it for data generating a custom machine learning AI model in the process capable of answering intelligent questions about your site Try out our ChatGPT support bot hereThe above website has roughly pages and after scraping our site we re able to get an accuracy of roughly in answers However importantly the module logs all questions answers and allows you to reinforce it as you ve gathered more training data to strengthen its result My guess is that over a month or two the above bot will be able to provide an accuracy of percent simply due to people asking it questions and me correcting its answers and re training it on my corrections a handful of times You can see me demonstrating the thing in the video below	2023-01-23 15:38:56
海外TECH	DEV Community	Connexion Bureau à distance - Utiliser 2 écrans sur 3	https://dev.to/mxglt/connexion-bureau-a-distance-utiliser-2-ecrans-sur-3-4mng	Connexion Bureau àdistance Utiliser écrans sur Avec l explosion du télétravail il arrive de plus en plus que l on travaille en connexion àdistance Mais l utilisation de cet outil peut être gênant si on a plusieurs écrans et qu on ne veut pas tous les utiliser Aujourd hui on va voir comment faire pour utiliser par exemple seulement écrans sur Définir la configuration de baseAfin de pouvoir choisir les écrans sur lesquels le partage de connexion va se faire vous devez d abord vous créer une configuration oùvous voulez utiliser tous les écrans Mise àjour de la configurationOuvrez le fichier de configurations crééàl étape précédente avec un bloc note ou n importe quel autre éditeur de texte Regardez si vous voyez le paramètre suivant selectedmonitorsSi vous ne le voyez pas ajoutez le en vous basant sur l exemple ci dessous selectedmonitors s Les identifiants que vous voyez en tant que valeur du paramètre correspondent aux identifiants des écrans que vous voulez utilisez pour la connexion àdistance Récupération des identifiantsAfin de récupérer les identifiants il vous suffit d exécuter la commande suivante mstsc lVous allez obtenir la pop up suivante oùvous pouvez voir les identifiants des écrans ainsi que leurs coordonnées Dans cet exemple est l écran principal qui est au centre se trouve àsa gauche vu qu il a sa coordonnée x de négative et se trouve àsa droite A présent vous pouvez aller remodifier le fichier de configuration pour y mettre uniquement les écrans dont vous avez besoin LiensDocumentation Microsoft sur la commande mstsc v ws J espère que ça vous sera utile	2023-01-23 15:31:00
海外TECH	DEV Community	Best practices for optimizing the performance of your React application	https://dev.to/sarahokolo/best-practices-for-optimizing-the-performance-of-your-react-application-2e4c	Best practices for optimizing the performance of your React application IntroductionIn this article we are going to dive into understanding of the best practices and techniques for optimizing the performance of your React application We would also be looking into some advanced techniques like implementing a caching strategy utilizing hooks like useMemo that will help you to identify and solve any performance bottlenecks in your application And you ll have the knowledge to improve the performance of your application So let s get started Table Of Contents TOC Understanding the Basics Identifying performance bottlenecksImplementing a caching strategy Using functional components and hooks Lazy loading and code splittingProfiling and debugging toolsConclusionUnderstanding the BasicsWhen it comes to understanding the basics of optimizing the performance of your React application there are two key concepts that you need to be familiar with the Virtual DOM and minimizing re renders Let s start with the Virtual DOM The Virtual DOM is a representation of the actual DOM Document Object Model that React uses to track changes in your application s components When a component s state or props change React updates the Virtual DOM first and then compares it to the actual DOM to determine which changes need to be made This allows React to make efficient updates by only changing the parts of the DOM that have actually changed rather than re rendering the entire page Here s a simple example of how the Virtual DOM works in practice Let s say you have a component that displays a list of items and you want to add a new item to the list Instead of re rendering the entire list the Virtual DOM will only update the specific part of the DOM that corresponds to the new item class List extends React Component state items item item handleClick gt this setState prevState gt items prevState items item render return lt div gt lt ul gt this state items map item index gt lt li key index gt item lt li gt lt ul gt lt button onClick this handleClick gt Add Item lt button gt lt div gt When you click the Add Item button the component s state will update and the Virtual DOM will re render with the new item React will then compare the Virtual DOM to the actual DOM and make the necessary changes which in this case is just adding the new item to the list Now let s talk about minimizing re renders As the name suggests minimizing re renders means reducing the number of times a component is re rendered This is important because re rendering a component can be a costly operation especially if it has a lot of child components that also need to be re rendered Minimizing re renders will help to improve the overall performance of your application shouldComponentUpdate is a lifecycle method in React that allows you to control when a component should re render By default whenever the state or props of a component change React will re render that component and all of its child components However in some cases you may want to prevent a component from re rendering if certain conditions are not met Here s an example of how you might use the shouldComponentUpdate lifecycle method to minimize re renders in a component class MyComponent extends React Component shouldComponentUpdate nextProps nextState Only re render if the name prop changes return nextProps name this props name render return lt div gt Hello this props name lt div gt In this example the MyComponent will only re render if the name prop changes which will help to minimize the number of re renders and improve performance Identifying Performance BottlenecksA performance bottleneck is a point in the application where the performance is significantly impacted usually due to a high number of re renders or a complex component that takes a long time to render Identifying these bottlenecks is crucial because it allows you to focus your optimization efforts where they are needed most There are several tools and techniques that you can use to identify performance bottlenecks in your React application One of the most popular tools is the React Developer Tools browser extension which allows you to inspect the component tree and see how many times each component is re rendered Here s an example of how you might use the React Developer Tools to identify a performance bottleneck in a component class MyComponent extends React Component state count state with a count of handleClick gt this setState prevState gt count prevState count handleClick function to increment the state count by render return lt div gt lt button onClick this handleClick gt Increment lt button gt lt p gt Count this state count lt p gt lt div gt render function with a button and a p element that displays the count In this example when the button is clicked the handleClick function is called which increments the count by and re renders the component You can use the React Developer Tools to inspect the component and see how many times it is re rendered Implementing a caching strategyCaching involves storing the results of expensive operations or computations in memory so that they can be reused later instead of recalculating them each time they are needed This can greatly improve the performance of your application by reducing the number of expensive operations that need to be performed There are several ways to implement a caching strategy in a React application One of the most popular ways is to use a caching library such as lru cache or memoize one These libraries provide a simple API for caching the results of functions Here s an example of how you might use the memoize one library to cache the results of a function import memoize from memoize one const expensiveFunction arg arg gt Expensive operation that takes a lot of time return result const memoizedFunction memoize expensiveFunction class MyComponent extends React Component state arg arg handleChange event gt this setState event target name event target value handleClick gt const result memoizedFunction this state arg this state arg console log result render return lt div gt lt input name arg onChange this handleChange value this state arg gt lt input name arg onChange this handleChange value this state arg gt lt button onClick this handleClick gt Get Result lt button gt lt div gt In this example we use the memoize one library to cache the results of the expensiveFunction which is an expensive operation that takes a lot of time We then use the memoizedFunction in our component s handleClick function By doing this the expensiveFunction will only be invoked when the inputs arg and arg change otherwise the cached result will be returned Another way to implement caching in your React application is by using the useMemo and useCallback hooks These hooks allow you to cache the results of functions or computations and only re run them when specific dependencies change Here s an example of how you might use the useMemo hook to cache the results of a function import useMemo from react const expensiveFunction arg arg gt Expensive operation that takes a lot of time return result function MyComponent const arg setArg useState const arg setArg useState state to hold the inputs const memoizedResult useMemo gt expensiveFunction arg arg arg arg caching the result of the expensiveFunction return lt div gt lt input name arg onChange e gt setArg e target value value arg gt lt input name arg onChange e gt setArg e target value value arg gt lt button onClick gt console log memoizedResult gt Get Result lt button gt lt div gt In this example we use the useMemo hook to cache the results of the expensiveFunction and only re run it when the inputs arg and arg change We then use the memoizedResult in our component s onClick function and display it in the console Using functional components and hooksFunctional components are a simpler and more lightweight way to define a component in React They are defined as a plain JavaScript function that takes props as an argument and returns JSX They don t have access to lifecycle methods and state so they are less prone to bugs and they are easier to test and reason about Here s an example of a simple functional component that takes a name prop and returns a greeting const Greeting name gt lt div gt Hello name lt div gt Hooks are another way to use functional components to improve the performance of your React application Hooks are functions that allow you to use state and lifecycle methods in functional components They are designed to make it easy to reuse stateful logic between components Here s an example of a functional component that uses the useState hook to keep track of a counter import useState from react const Counter gt const count setCount useState return lt div gt lt p gt Count count lt p gt lt button onClick gt setCount count gt Increment lt button gt lt div gt By using functional components and hooks you can improve the performance of your React application by making your code more readable organized and easy to reason about as well as making it more composable and testable Lazy Loading and Code SplittingLazy loading and code splitting are techniques that can greatly improve the performance of your React application by loading only the code that is needed for a specific route or component instead of loading the entire application at once This can help to reduce the initial load time of your application and improve the overall user experience One way to implement lazy loading and code splitting in your React application is by using React Router React Router allows you to define a dynamic import function that loads the code for a specific route only when the user navigates to that route Here s an example of how you might use React Router to lazy load a component import Route Switch from react router dom const Home React lazy gt import Home const About React lazy gt import About function App return lt Suspense fallback lt div gt Loading lt div gt gt lt Switch gt lt Route exact path component Home gt lt Route path about component About gt lt Switch gt lt Suspense gt In this example we use the React lazy function to dynamically import the Home and about components The Suspense component is used to provide a loading state while the code for the lazy loaded components is being loaded Another way to implement lazy loading and code splitting is by using webpack and the dynamic import syntax This allows you to split your code into smaller chunks that can be loaded on demand Here s an example of how you might use webpack and the import syntax to code split a component import Loadable from react loadable const LoadableComponent Loadable loader gt import MyComponent loading gt lt div gt Loading lt div gt function App return lt LoadableComponent gt In this example we use the react loadable library to split the MyComponent into a separate chunk which will only be loaded when the LoadableComponent is rendered Profiling and Debugging ToolsWhen it comes to optimizing the performance of your React application profiling and debugging tools are essential These tools allow you to analyze the performance of your application and identify areas that need improvement They provide detailed information about the performance of your application such as the time taken to render a component the number of re renders and the size of the JavaScript bundle One of the most popular tools for profiling and debugging React applications is the React Developer Tools browser extension This extension allows you to inspect the component tree view the props and state of each component and see how many times each component is re rendered It also allows you to analyze the performance of your application by measuring the time taken to render a component and the number of re renders Another popular tool is the Chrome DevTools Performance panel This panel allows you to record the performance of your application and analyze the results to identify areas where the performance could be improved It also allows you to view the JavaScript call stack which can help you to identify the source of performance issues Here s an example of how you might use the Chrome DevTools Performance panel to profile the performance of your React application Open the Chrome DevTools and go to the Performance panel Click the Record button to start recording the performance of your application Perform the actions that you want to analyze e g clicking a button that triggers a re render Click the Stop button to stop recording Analyze the results to see which actions had the biggest impact on the performance and identify the bottlenecks Here are a few libraries that can be used for profiling and debugging your React application The React axe library which is an accessibility testing tool that can help you to identify and fix accessibility issues in your application The why did you render library which is a library that helps you to understand why a component is re rendering and which props or state changes are causing the re render The react tracker library which is a library that allows you to track the performance of your components and the impact of different props and state changes These tools can help you to identify performance bottlenecks memory leaks and other issues that may be impacting the performance of your React application By using these tools you can gain a deeper understanding of how your application is performing and make informed decisions about how to optimize its performance ConclusionIn conclusion optimizing the performance of your React application is an important aspect of building a high performing and scalable application The article outlined several best practices for improving the performance of your React application including identifying performance bottlenecks implementing a caching strategy using functional components and hooks lazy loading and code splitting and using profiling and debugging tools By following these best practices you can improve the performance of your application and provide a better user experience It s important to keep in mind that performance optimization should be an ongoing process as new issues may arise and new techniques may become available However by staying informed and using the right tools and techniques you can ensure that your React application is always performing at its best References official React documentationMemoization in React by Dan Abramovmemoize one library documentation npmjslru cache implementation by geeksforgeeksThat s it for this article I hope you found it enlightening if you did please don t forget to leave a likeand follow for more content Have any questions Please don t hesitate to drop them in the comment section	2023-01-23 15:29:54
Apple	AppleInsider - Frontpage News	Spotify lays off 6% of workforce, loses content chief	https://appleinsider.com/articles/23/01/23/spotify-lays-off-6-of-workforce-loses-content-chief?utm_medium=rss	Spotify lays off of workforce loses content chiefLeading music streamer Spotify is cutting staff in a difficult but necessary move to reduce costs and in a restructure is losing Dawn Ostroff head of content and advertising Following layoffs at Google Microsoft Amazon and most recently Apple retail Spotify has announced redundancies as it fundamentally changes how it operates The announcement came in a blog post by Spotify CEO Daniel Ek Initially Ek says in the blog post that personally these changes will allow me to get back to the part where I do my best work Read more	2023-01-23 15:43:59
Apple	AppleInsider - Frontpage News	Deals: Apple's M2 Pro Mac mini with 16GB RAM drops to $1,199	https://appleinsider.com/articles/23/01/23/deals-apples-m2-pro-mac-mini-with-16gb-ram-drops-to-1199?utm_medium=rss	Deals Apple x s M Pro Mac mini with GB RAM drops to Apple s M Pro Mac mini features a core CPU core GPU GB of memory and a GB SSD ーand best of all it s on sale with this exclusive discount Save on the M Pro Mac mini Best M Pro Mac mini price available Read more	2023-01-23 15:26:56
Apple	AppleInsider - Frontpage News	M2 Pro & Max MacBook Pro review roundup: Impressive spec bump	https://appleinsider.com/articles/23/01/23/m2-pro-max-macbook-pro-review-roundup-impressive-spec-bump?utm_medium=rss	M Pro amp Max MacBook Pro review roundup Impressive spec bumpThe first wave of reviews for Apple s M Pro and M Max updates to the inch MacBook Pro and inch MacBook Pro have been published with the increased performance one of many high points for the releases inch MacBook ProThe upgrades to the inch MacBook Pro and inch MacBook Pro lineup happened on January as part of the company s surprise press release based launches with Apple switching out the M series chips to the M Pro and M Max Read more	2023-01-23 15:24:15
Apple	AppleInsider - Frontpage News	Pick up Apple's M2 Mac mini 2023 for just $549	https://appleinsider.com/articles/23/01/21/pick-up-apples-m2-mac-mini-2023-for-just-499?utm_medium=rss	Pick up Apple x s M Mac mini for just The cheapest M Mac mini preorder price can be found at AppleInsider with the Mac mini eligible for an exclusive discount Save on this M Mac mini Apple s new M Mac mini may have gotten a price drop compared to the starting price of the M model but AppleInsider readers can save another to with promo code APINSIDER at Apple Authorized Reseller Adorama when you order a retail configuration Select between the standard M model with GB of memory and a GB SSD for off ーor double the amount of storage and pick up the GB model for off Read more	2023-01-23 15:04:39
海外TECH	Engadget	Microsoft expands its pact with OpenAI in 'multibillion dollar' deal	https://www.engadget.com/microsoft-openai-investment-expansion-152302151.html?src=rss	Microsoft expands its pact with OpenAI in x multibillion dollar x dealMicrosoft is once again pouring money into OpenAI as part of an expanded partnership The tech giant is making a quot multibillion dollar quot investment that will lead to wider uses of OpenAI s technology as well as stronger behind the scenes support While the two companies are short on specifics Microsoft says you can expect quot new categories of digital experiences quot that include both consumer facing and business products The developer focused Azure OpenAI Service will play a role The continued union will also see Microsoft boost its investments in supercomputers that accelerate OpenAI s research Azure will remain OpenAI s sole cloud provider for products research and services The exact size of the financial contribution isn t known but a Bloombergsource claims Microsoft is investing billion over quot multiple years quot Microsoft first backed OpenAI in and returned in The New York Times notes it quot quietly quot invested an extra billion since that initial round The companies have grown closer since their collaboration began On top of the Azure service Microsoft has launched OpenAI powered features that include natural language programming and a DALL E graphic design tool OpenAI uses Microsoft s infrastructure to train its best known systems including DALL E and the popular ChatGPT bot ChatGPT is coming to Azure soon There s no mention of some rumored developments such as building ChatGPT into Bing However this expansion may help Microsoft seize a competitive advantage Google reportedly sees ChatGPT as a threat to its search business and is believed to be devoting much of its attention to a search chatbot and other AI products despite a reluctance to fully embrace the technology over concerns about copyright Even if the deeper OpenAI partnership doesn t improve Bing Microsoft may benefit by forcing rivals like Google to change course	2023-01-23 15:23:02
Cisco	Cisco Blog	Join Cisco at DISTRIBUTECH 2023	https://blogs.cisco.com/energy/join-cisco-at-distributech-2023	Join Cisco at DISTRIBUTECH Once again Cisco will be attending DISTRIBUTECH International the leading annual transmission and distribution event for utilities technology providers and industry leaders DISTRIBUTECH takes place on February th th at the San Diego Convention Center and brings together over global electric gas and water utility professionals We are proud to be a	2023-01-23 15:57:13
海外TECH	CodeProject Latest Articles	IntelliTask - An Alternative Windows Version to the Famous Task Manager	https://www.codeproject.com/Articles/867009/IntelliTask-An-Alternative-Windows-Version-to-the	IntelliTask An Alternative Windows Version to the Famous Task ManagerTask Manager shows you the programs processes and services that are currently running on your computer You can use Task Manager to monitor your computer s performance or to close a program that is not responding	2023-01-23 15:02:00
海外科学	NYT > Science	How to Watch the ‘Green Comet’ in Night Skies	https://www.nytimes.com/article/green-comet-watch.html	stone	2023-01-23 15:34:19
海外科学	NYT > Science	Earth’s Inner Core Paused, Then Reversed Its Spin. This Is Fine.	https://www.nytimes.com/2023/01/23/science/earth-core-reversing-spin.html	Earth s Inner Core Paused Then Reversed Its Spin This Is Fine Researchers proposed a model with a year rotation cycle of our planet s iron heart and report that we re in the middle of one of its big shifts	2023-01-23 16:00:07
金融	RSS FILE - 日本証券業協会	J-IRISS	https://www.jsda.or.jp/anshin/j-iriss/index.html	iriss	2023-01-23 15:39:00
ニュース	BBC News - Home	Richard Sharp: Review begins into BBC chairman's appointment	https://www.bbc.co.uk/news/uk-64377685?at_medium=RSS&at_campaign=KARANGA	public	2023-01-23 15:54:04
ニュース	BBC News - Home	Mark Cavendish robbery: Man guilty of armed raid at cyclist's home	https://www.bbc.co.uk/news/uk-england-essex-64334766?at_medium=RSS&at_campaign=KARANGA	essex	2023-01-23 15:56:37
ニュース	BBC News - Home	Frank Lampard: Everton manager sacked after defeat by West Ham	https://www.bbc.co.uk/sport/football/63610629?at_medium=RSS&at_campaign=KARANGA	league	2023-01-23 15:56:49
ニュース	BBC News - Home	Plymouth shootings: Gun licence application not referred to manager	https://www.bbc.co.uk/news/uk-england-devon-64375316?at_medium=RSS&at_campaign=KARANGA	plymouth	2023-01-23 15:32:49
ニュース	BBC News - Home	Households will be paid to use less electricity today	https://www.bbc.co.uk/news/business-64367504?at_medium=RSS&at_campaign=KARANGA	electricity	2023-01-23 15:39:49
ニュース	BBC News - Home	Stephen Hendry fined for pulling out of tournaments to appear on 'The Masked Singer'	https://www.bbc.co.uk/sport/snooker/64375644?at_medium=RSS&at_campaign=KARANGA	Stephen Hendry fined for pulling out of tournaments to appear on x The Masked Singer x Stephen Hendry says he was fined for pulling out of snooker tournaments in order to appear on The Masked Singer	2023-01-23 15:10:15
ニュース	BBC News - Home	Australian Open: Ben Shelton making a global name on his first trip out of United States	https://www.bbc.co.uk/sport/tennis/64372472?at_medium=RSS&at_campaign=KARANGA	Australian Open Ben Shelton making a global name on his first trip out of United StatesAmerican youngster Ben Shelton finally got to use his passport for the first time when he travelled to the Australian Open now he s making a name globally	2023-01-23 15:24:23