| python |
Pythonタグが付けられた新着投稿 - Qiita |
画像処理を使った球状黒鉛鋳鉄（FCD）の黒鉛球状化率の測定（新旧規格の比較） |
https://qiita.com/_Moony/items/ec5beeaa1def4549b09a
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画像処理 |
2022-11-24 22:29:09 |
| js |
JavaScriptタグが付けられた新着投稿 - Qiita |
Storybook で特定の Story で Controls を無効にする |
https://qiita.com/shingo-sasaki/items/00e558efdab40b12332e
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controls |
2022-11-24 22:03:23 |
| 技術ブログ |
Developers.IO |
[アップデート]AWS WAFのBot Controlルールグループに検査レベル「Targeted」が追加され、新たに4つのインテリジェントなルールが利用可能になりました |
https://dev.classmethod.jp/articles/aws-waf-targeted-bot/
|
awswaf |
2022-11-24 13:58:18 |
| 技術ブログ |
Developers.IO |
Mesh to MetaHumanで自分似の3Dモデルを作って #UnrealEngine5 に組み込んでみた |
https://dev.classmethod.jp/articles/mesh-to-metahuman-unreal-engine/
|
engine |
2022-11-24 13:32:24 |
| 海外TECH |
DEV Community |
Strict Mode in React 18 |
https://dev.to/refine/strict-mode-in-react-18-915
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Strict Mode in React Author Deborah Emeni IntroductionIn recent years React js has undergone significant development by adding and improving new features to solve discovered bugs and provide tools that improve application performance In March a new version React v was released with features such as React Strict Mode Server Side Rendering SSR Suspense Concurrency Automatic Batching and the introduction of new hooks Among all of the new features the React Strict Mode feature stood out for its extensive improvements and functions in areas such as identifying coding patterns for bugs providing feedback to developers with no impact on the production build and much more In this article we ll see the React Strict Mode how it relates to the JavaScript “use strict expression its importance benefits features and significant improvements Steps we ll cover What is React Strict Mode Comparison between React Strict Mode and Use StrictReact Strict ModeUse StrictWhat s new in React v Benefits of React Strict ModeFeatures of React Strict ModeIdentifying components with unsafe lifecycles in ReactWarning About Legacy String Ref API UsageWarning about deprecated findDOMNode usageDetecting Unexpected Side EffectsDetecting Legacy Context APIEnsuring a reusable state What is React Strict Mode React Strict Mode is a developer tool highlighting potential bugs or issues in a React application s codebase It provides warnings to developers as feedback for errors that occur in an application with no effect on the result because it does not render any visible UI With React v new features were added to the framework and some existing features were significantly improved React Strict Mode runs some functions in the development environment to ensure that they return values identical to the desired arguments and have no unintended side effects These functions are as follows Functional ComponentInitializer FunctionUpdater FunctionReact Strict Mode versus “use strict This section explains the relationship between Strict Mode and the JavaScript use strict expression You can specify that a code block should be run in strict mode by appending use strict to the beginning of a script or function Strict Mode on the other hand detects errors in coding patterns and flags previously accepted bad syntax as errors by eliminating silent errors and throwing errors when they occur React Strict mode works similarly to JavaScript s use strict expression in that it ensures a more strict and type safe version of JavaScript The relationship between React Strict Mode and the use strict expression is described in the table below Comparison between React Strict Mode and Use Strict React Strict ModeUndeclared variables will return an error in React Strict mode It checks for the following Components with unsafe lifecycles Usage of legacy or deprecated APIs or methods like the string ref API and Context API and findDOMNode Unexpected side effects You can reference the Strict Mode by using lt React StrictMode gt or import StrictMode from react in your code Then the component can be called as StrictMode Wrap the suspected code in the Strict Mode helper component as shown in the code block below import React from react import ReactDOM from react dom client const root ReactDOM createRoot document getElementById root const SuspiciousCode gt return lt div gt Contains suspicious code blocks lt div gt root render lt React StrictMode gt lt SuspiciousCode gt lt React StrictMode gt Use StrictThe expression “use strict flags out the following as errors Assigning values to undeclared variables Use of keywords for variable name e g public Writing data to constant variables Accessing a variable before it is declared etc Both statements in the code example below will return errors because arguments is a reserved words and variable x is not defined Also “use strict must be specified at the top of the file for it to take effect use strict let arguments an argument x Stop wasting your time copy pasting your CRUD code all over your application Meet the headless React based solution to build sleek CRUD applications With refine you can be confident that your codebase will always stay clean and boilerplate free Try refine to rapidly build your next CRUD project whether it s an admin panel dashboard internal tool or storefront What s new in React v Strict Mode plays a significant role in the incremental adoption of Concurrent rendering a new implementation detail that in simple terms allows rendering UI to be interruptible While in development Strict Mode can be used to help expose concurrency related bugs The new React Strict Mode behaviours are as follows React Strict Mode can now be used to detect bugs that occur as code runs concurrently two or more tasks being carried out simultaneously Strict Mode only runs in development which does not impede the production build It logs extra warnings or errors and invokes functions twice to ensure that the expected results always occur With React Strict Mode can now handle mounting and unmounting components and in future preserve and restore their state on subsequent mounts Benefits of React Strict ModeReact Strict Mode comes with a couple of outstanding benefits Preventing Mutations of Values Strict Mode aids in the prevention of scenarios in applications where values are mutated by unpure functions resulting in different results after each render The developer can easily detect if the application returns the expected results thanks to its double invocation feature Ease of use React Strict mode makes it easier to work with unfamiliar codebases i e code that you did not write Bug detection It makes it easier to detect programming bugs Facilitating Clean Code Strict Mode helps you become a better React developer It assists the developer in writing cleaner code by instilling the habit of writing code that follows React s best practices Features of React Strict ModeIn this section you will learn about the current features of StrictMode which include Identifying components with unsafe lifecycles in React Warning about Legacy String Ref API usage Warning about deprecated findDOMNode usage Detecting unexpected side effects Detecting legacy context API Ensuring a reusable state Identifying components with unsafe lifecycles in ReactLegacy components such as componentWillMount componentWillReceiveProps and componentWillUpdate have been discovered to cause unhealthy code practices in React When misused in asynchronous React applications they produce undesirable results As a result React developers decided to prefix these lifecycles with UNSAFE in future releases As an improvement React Strict Mode will now detect and warn the developer whenever these lifecycles are used Furthermore React Strict Mode inspects third party packages in the development environment and can notify the user if these packages use deprecated dependencies Warning About Legacy String Ref API UsageDue to difficulties in passing refs to child components and issues with referencing the names of created Refs the use of the String Ref in React which was previously acceptable in previous versions now has a warning in Strict Mode Strict Mode warns developers instructing them to use Callback refs or React createRef as best practices Warning about deprecated findDOMNode usageFindDOMNode was a React feature designed to search the DOM node tree for a specific class interface A refactoring issue caused by the FindDOMNode approach was that the parent component needed to be aware of their child s implementation details to return the appropriate child Another issue was that FindDOMNode did not reflect changes in the state of node elements Detecting Unexpected Side EffectsDue to the Strict Mode practice of double invoking function routines functions can scrutinise their results to ensure they are pure and produce the desired results whenever the functions run As a result if a side effect occurs erroneously during the function render process it can easily be detected and traced in Development Mode due to visible inconsistencies in the program s output Detecting Legacy Context APIStrictMode now highlights the use of the old Context API prompting the user to upgrade to a higher version as the Legacy Context API will be discontinued in future React releases Ensuring a reusable stateIn future versions the React Strict Mode aims to prevent state loss caused by component mounts and dismounts This feature improves performance by retaining and restoring application states when dismounted components are mounted back into the component tree ConclusionIn this article you learned about the React Strict Mode its similarities to the JavaScript “use strict expression and the enormous benefits and features of the React Strict Mode |
2022-11-24 13:39:45 |
| 海外TECH |
DEV Community |
git is not the end of history |
https://dev.to/jmfayard/git-is-not-the-end-of-history-42f0
|
git is not the end of historyI hereby am foolish enough to predict that in years for now we will see a new tool for version control let s call it hju that will attract millions of developers on a promise that could be hju is like git but simpler Specifically hju concepts will be a lot like git you will have commits branches sha clones hju will have great interoperability with git Importing your GitHub repository into hju will be one click Transforming you hju repository in a git repo will also be simple hju will struggle to find a business model that supports a team strong enough to build a tool concurrent to git Probably the main hurdle right here hju will not try to have feature parity with git git can support all the complex workflows you have not imagined yet The more complex workflow will stay with git Especially projects like the Linux Kernel bazaar projects that are completely decentralized will see no point in migrating to hju hju will instead work hard to make the life simpler for the vast majority of projects where a small number of developers work together know each other trust each other git will probably have more users than hju for a long while But there are enough developers that having for example of the market is completely sustainable hju on the other hand will be focused on the most common usages of version control It will be designed for usability It will be significantly harder to fuck up things with hju than with git hju will lower the cognitive load When submitting a pulll request you will feel that you are more focused on the task at hand rather than on what your control version tool expects from you hju will discourage practices like rewriting history that makes it so enjoyable to shoot yourself in the foot It will push the idea that it s OK if the hju history inside a PR doesn t look like what should have happened but instead like what actually happened It will encourage people to have small PRs focused on one thing and that can be squashed squashing will be the default hju will have a vastly better learning curve than git At some points bootcamps and university courses will teach hju rather than git because the ratio of concepts learned over time spent is so much better There will be great tutorials on the internet on how to learn git if you already know hju hju will just work on Windows and AndroidBest case scenario Microsoft has already a secret internal project similar to hju and will make sure GitHub can make it an implementation detail of whether you use git or hju Dear readers what s the best and the lamest part in my prediction Since you too can predict the future how do you see the future of version control |
2022-11-24 13:33:39 |
| 海外TECH |
Engadget |
Amazon's new Kindle drops to $85 for Black Friday |
https://www.engadget.com/amazon-new-kindle-black-friday-sale-140055896.html?src=rss
|
Amazon x s new Kindle drops to for Black FridayAmazon s latest entry level Kindle has received its first discount in time for Black Friday The company is selling the ad supported Kindle for or below the official price That makes it tempting if you re planning a gift for the bookworm in your life or have just been waiting for a deal to treat yourself to Amazon s most affordable e reader The refreshed starter Kindle is a major upgrade The centerpiece is a inch pixels per inch display that s much sharper than the PPI screen of its predecessor making text that much easier on the eyes A longer six week battery life USB C charging and doubled storage GB also make it decidedly more practical than the previous model You might not need more than this to have your dream e reader although you may want to pay extra to avoid lockscreen ads If you do need more though Amazon s ongoing Black Friday sale gives you options Most notably the Kindle Paperwhite is still available for You won t have as much storage for that money you ll need to spend but you will get a larger inch display bath friendly water resistance and an adjustable warm light If you don t need those perks or just want the smallest reader in the lineup though the base Kindle is still easy to justify Buy Kindle Paperwhite at Amazon Follow EngadgetDeals on Twitter and subscribe to the Engadget Deals newsletter for the latest tech deals and buying advice |
2022-11-24 13:30:55 |
| 金融 |
RSS FILE - 日本証券業協会 |
会長記者会見−2022年− |
https://www.jsda.or.jp/about/kaiken/kaiken_2022.html
|
記者会見 |
2022-11-24 14:00:00 |
| ニュース |
BBC News - Home |
UK net migration hits all-time record at 504,000 |
https://www.bbc.co.uk/news/uk-63743259?at_medium=RSS&at_campaign=KARANGA
|
ukraine |
2022-11-24 13:05:55 |
| ニュース |
BBC News - Home |
Housing: Tens of thousands of homes unsafe, Michael Gove says |
https://www.bbc.co.uk/news/uk-63739367?at_medium=RSS&at_campaign=KARANGA
|
number |
2022-11-24 13:47:08 |
| ニュース |
BBC News - Home |
Shamima Begum joined IS with eyes open, UK lawyers says |
https://www.bbc.co.uk/news/uk-63745251?at_medium=RSS&at_campaign=KARANGA
|
citizenship |
2022-11-24 13:29:54 |
| ニュース |
BBC News - Home |
World Cup 2022: Switzerland 1-0 Cameroon - Breel Embolo strike secures win |
https://www.bbc.co.uk/sport/football/63657470?at_medium=RSS&at_campaign=KARANGA
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World Cup Switzerland Cameroon Breel Embolo strike secures winSwitzerland s Cameroon born Breel Embolo scores the only goal as they see off the Indomitable Lions in Group G at the Al Janoub Stadium in Qatar |
2022-11-24 13:20:50 |
| 仮想通貨 |
BITPRESS（ビットプレス） |
日本銀行、中央銀行デジタル通貨に関する 日本銀行の取り組み |
https://bitpress.jp/count2/3_9_13463
|
取り組み |
2022-11-24 22:08:35 |
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