投稿時間:2021-05-26 01:38:58 RSSフィード2021-05-26 01:00 分まとめ(40件)

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IT	気になる、記になる…	Amazon、新型｢Fire HD 10｣シリーズを発売	https://taisy0.com/2021/05/26/140993.html	amazon	2021-05-25 15:18:09
AWS	AWS Architecture Blog	Making Effective Decisions for Your V1 AWS Design	https://aws.amazon.com/blogs/architecture/making-effective-decisions-for-your-v1-aws-design/	Making Effective Decisions for Your V AWS DesignIn reviewing your existing business application portfolio to create V AWS designsーthe first architecture design for moving to AWSーwe must address two main factors that often inhibit progress Your technology teams must find a clear path forward that balances modernization and migration You must provide clear criteria to transform your platforms and also continue to …	2021-05-25 15:52:02
AWS	AWS Database Blog	Visualize your AWS Infrastructure with Amazon Neptune and AWS Config	https://aws.amazon.com/blogs/database/visualize-your-aws-infrastructure-with-amazon-neptune-and-aws-config/	Visualize your AWS Infrastructure with Amazon Neptune and AWS ConfigAs an organization you run critical applications on AWS and the infrastructure that runs those critical applications can be spread across different accounts and have complex relationships When you want to understand the landscape of your existing setup it can seem daunting to go through lists of resources and try to understand how the resources …	2021-05-25 15:48:22
AWS	AWS - Webinar Channel	Transferring SaaS Application Data Securely with Amazon AppFlow - AWS Online Tech Talks	https://www.youtube.com/watch?v=oH1QHCiyHyE	Transferring SaaS Application Data Securely with Amazon AppFlow AWS Online Tech TalksBusinesses store critical data in multiple locations with software as a service SaaS providers and in distributed applications Organizing this dispersed data for reporting and analysis can be complex and often requires custom middleware that is costly and untimely This session explains how to configure a data transfer from SaaS applications to a central target with point and click operations Learn how to validate map and modify incoming data and filter what is sent to the target destination This talk also discusses best practices in securing the transfer of data between resources Learning Objectives Learn how to create Amazon AppFlow data transfers Understand how to manipulate data output for security and analysis Use best practices for securing Amazon AppFlow data transfers To learn more about the services featured in this talk please visit	2021-05-25 15:58:10
python	Pythonタグが付けられた新着投稿 - Qiita	matplotlibでpng画像表示	https://qiita.com/iHdkz/items/63a5e4ebc5d380be22fa	matplotlibでpng画像表示pythonで画像表示恥ずかしながら今までプログラミング言語でプログラムして画像表示というものをしたことがなかった。	2021-05-26 00:07:23
python	Pythonタグが付けられた新着投稿 - Qiita	Pythonでテキストファイルを読み込む	https://qiita.com/fastso/items/3cc281aadd08b12102ce	Pythonでテキストファイルを読み込むテキストファイル全体を読み込むfileopentesttxtmodermoder読込みw書込みtextfilereadprinttextテキストファイル全体が表示されるfilecloseファイルを閉じたかprintfileclosedTrueテキストファイルを一行ずつ読み込むファイルサイズが大きい場合、全体ではなく行単位の操作が望ましい場合があります。	2021-05-26 00:06:37
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	基底クラスが仮想デストラクタを持てば、子クラスが非仮想デストラクタでも、孫クラスのデストラクタは呼び出されますか	https://teratail.com/questions/340366?rss=all	基底クラスが仮想デストラクタを持てば、子クラスが非仮想デストラクタでも、孫クラスのデストラクタは呼び出されますか質問以下のC言語のプログラムにおいて、実行結果がchildmiddlebaseとなることは保証された動作ですか。	2021-05-26 00:57:02
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	Google Apps Script WebAPI	https://teratail.com/questions/340365?rss=all	GoogleAppsScriptWebAPIGooglenbspAppsnbspScriptでWebAPIを作成しています。	2021-05-26 00:33:40
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	プロパティの更新と参照方法を教えてほしい	https://teratail.com/questions/340364?rss=all	プロパティの更新と参照方法を教えてほしい実現したいことフィールドnbspdoublenbspxnbspy•nbspコンストラクタはxnbspynbspの座標を引数とし対応するフィールドの値を初期化する•nbspプロパティnbspXnbspYnbspを設定してnbspxnbspynbspの更新参照を可能とする•nbspメソッドnbspgetCoordnbspは引数無しで座標をnbspxの値nbspyの値形式の文字nbsp列として返す•nbspメソッドnbspgetDistancenbspは引数にnbspPointnbspクラスのオブジェクトを渡し点間の距離を求めてdouble型で値を返す。	2021-05-26 00:11:21
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	phpのファイルからデータを表示するコードについて	https://teratail.com/questions/340363?rss=all	phpのファイルからデータを表示するコードについて今回、phpを用いてデータファイルから文字を取り出し出力するプログラムを引用しました。	2021-05-26 00:09:14
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	javascript TEXTのchangeイベントを連鎖させたい	https://teratail.com/questions/340362?rss=all	javascriptTEXTのchangeイベントを連鎖させたい前提・実現したいことjavascriptでchengeイベントをドロップダウン項目nbsp→nbspTEXTnbsp→nbspTEXTの順番で連続で発動させたい。	2021-05-26 00:05:32
AWS	AWSタグが付けられた新着投稿 - Qiita	Webアプリ公開のためのAWS環境構築・CloudFormation編(備忘録ベース)	https://qiita.com/artail2020/items/b019d1387ccff81d2757	あらかじめ作成したCloudFormationテンプレートを元に、AWSCLIのコマンドでスタック作成させるところまでが一旦のゴールですね。	2021-05-26 00:20:57
海外TECH	Ars Technica	Unsolved Mysteries: Quantum Leap’s Don Bellisario on the fate of Sam Beckett	https://arstechnica.com/?p=1767382	ziggy	2021-05-25 15:10:27
海外TECH	Ars Technica	COVID cases after vaccination are still very rare—variants aren’t changing that	https://arstechnica.com/?p=1767422	covid	2021-05-25 15:00:42
海外TECH	DEV Community	How asynchronous works in JavaScript. Event Loop concept	https://dev.to/upplabs/how-asynchronous-works-in-javascript-event-loop-concept-1ddb	How asynchronous works in JavaScript Event Loop conceptWritten by Kirill Bychkov for UppLabs JavaScript is easy when all you need is a simple working interface The problems begin when the interface becomes more complex Here you need to have a deeper understanding of JavaScript It is important that even a large and complex interface remains fast and responsive Responsiveness is usually achieved through the use of asynchronous functions This means that you can let your code do several things at the same time without stopping or blocking the main thread In this article I will try to tell you as simply as possible about the work of asynchronous in JavaScript At all interviews in my life I have been always asked this question When you start learning JS it can seem daunting but in reality everything is much simpler How does the Event Loop work Event Loop is one of those things that every JavaScript developer encounters in one way or another JavaScript provides a concurrency model based on an event loop which executes the code collecting and processing events and performs queued sub tasks I think it s not difficult to guess what sequence these logs will be called in Let s check But let s take a look at what s going on under the hood In the example I am using this helpful siteWhen the program starts it runs through the lines of code When an asynchronous operation comes across the interpreter throws this operation into a Call Stack In the stack it begins to look like a certain set timeout and as a browser API Then it throws out the set timeout and registers some anonymous function in the web APIs which will be executed when the browser completes the set timeout after seconds Next the anonymous function enters the callback queue An endless loop runs in the queue which runs over its elements and if it detects that the function is ready it throws it back into the call stack and executes Thus we do not block the work of the code We are talking not only about set timeouts but also about other asynchronous operations such as event listeners that work along with the server But what happens if is passed as the second parameter to the timeout set Exactly the same Let s see The browser will still drop the function into the web API and the program will continue to work Let s also take a look at how the event listener works The event listener as mentioned above is also an asynchronous event and goes to the web API You now understand the importance of unsubscribing from listening to events You can read more details here Macro tasksLet s take the same event example and try to click the button a few times We see a queue of events This is the macro task callback queue a v term Tasks from the queue are executed according to the first in first out rule Let s note two details Rendering of the page never happens during the execution of a task by the engine It doesn t matter how long the task takes Changes to the DOM are rendered only after the task is completed If the task takes a very long time and the browser cannot perform other tasks or process user events So sometime later the browser offers you to kill the long running task This is possible when the script contains a lot of complex calculations or an error leading to an infinite loop Micro tasksWe could see the micro tasks in the last example When the macro task is executing the functions from it are placed in the call stack The new macro task does not start its execution until the micro tasks have finished there If you need more examples you can check here ConclusionsThanks to JavaScript we can write asynchronous applications without thinking about multithreading like data integrity and data consistency If we are performing an operation that takes time such as querying a database and using the results to fill the templates it is better to push them out of the main thread and execute the task asynchronously We compensate for these benefits with a huge number of callbacks and constant loss of context Depending on the specifics of the task it may turn out that you will be using async await callbacks or some mixture of different technologies In fact the answer to the question which asynchronous development methodology to choose depends on the specifics of the project If a certain approach allows you to solve a problem using readable code that is easy to maintain and other team members can easily understand then this approach is what you need Now you can use callback promises or async await with understanding how it works in the browser I hope this article was helpful for you You can also find more useful information on our blog	2021-05-25 15:52:34
海外TECH	DEV Community	Pretty printing JSON.stringify	https://dev.to/siddharthshyniben/pretty-printing-json-stringify-4pd3	Pretty printing JSON stringifyMost of use JSON stringify a lot to avoid the infamous object Object But did you know that it had a few more arguments JSON stringify takes a total of arguments The first one is the data the second is a replacer function and the third one is the indentation The main topic of this article is the third argument If you provide a string as the third argument that string will be used as indentation Here s an example JSON stringify a B c d e gt a B c d e JSON stringify a B c d e null gt a B c d e JSON stringify a B c d e null test gt test a B test c testtest d e test You can also pass in a number instead If you do so that many spaces will be inserted as indentation JSON stringify a B c d e null gt a B c d e Hope this helps you while debugging sometime	2021-05-25 15:08:17
海外TECH	DEV Community	How to manage global state with XState and React	https://dev.to/mpocock1/how-to-manage-global-state-with-xstate-and-react-3if5	How to manage global state with XState and ReactMany React applications follow the Flux architecture popularised by Redux This setup can be characterised by a few key ideas It uses a single object at the top of your app which stores all application state often called the store It provides a single dispatch function which can be used to send messages up to the store Redux calls these actions but I ll be calling them events as they re known in XState How the store responds to these messages from the app are expressed in pure functions most often in reducers This article won t go into depth on whether the Flux architecture is a good idea David Khourshid s article Redux is half a pattern goes into great detail here For the purposes of this article we re going to assume that you like having a global store and you want to replicate it in XState There are many reasons for wanting to do so XState is second to none when it comes to managing complex asynchronous behaviour and modelling difficult problems Managing this in Redux apps usually involves middleware either redux thunk redux loop or redux saga Choosing XState gives you a first class way to manage complexity A globally available storeTo mimic Redux s globally available store we re going to use React context React context can be a tricky tool to work with if you pass in values which change too often in can result in re renders all the way down the tree That means we need to pass in values which change as little as possible Luckily XState gives us a first class way to do that import React createContext from react import useInterpret from xstate react import authMachine from authMachine import InterpreterFrom from xstate interface GlobalStateContextType authService InterpreterFrom lt typeof authMachine gt export const GlobalStateContext createContext Typed this way to avoid TS errors looks odd I know as GlobalStateContextType export const GlobalStateProvider props gt const authService useInterpret authMachine return lt GlobalStateContext Provider value authService gt props children lt GlobalStateContext Provider gt Using useInterpret returns a service which is a static reference to the running machine which can be subscribed to This value never changes so we don t need to worry about wasted re renders Utilising contextFurther down the tree you can subscribe to the service like this import React useContext from react import GlobalStateContext from globalState import useService from xstate react export const SomeComponent props gt const globalServices useContext GlobalStateContext const state useService globalServices authService return state matches loggedIn Logged In Logged Out The useService hook listens for whenever the service changes and updates the state value Improving PerformanceThere s an issue with the implementation above this will update the component for any change to the service Redux offers tools for deriving state using selectors functions which restrict which parts of the state can result in components re rendering Luckily XState provides that too import React useContext from react import GlobalStateContext from globalState import useSelector from xstate react const selector state gt return state matches loggedIn export const SomeComponent props gt const globalServices useContext GlobalStateContext const isLoggedIn useSelector globalServices authService selector return isLoggedIn Logged In Logged Out Now this component will only re render when state matches loggedIn returns a different value This is my recommended approach over useService for when you want to optimise performance Dispatching eventsFor dispatching events to the global store you can call a service s send function directly import React useContext from react import GlobalStateContext from globalState export const SomeComponent props gt const globalServices useContext GlobalStateContext return lt button onClick gt globalServices authService send LOG OUT gt Log Out lt button gt Note that you don t need to call useService for this it s available right on the context Deviations from FluxKeen eyed readers may spot that this implementation is slightly different from Flux For instance instead of a single global store one might have several running machines at once authService dataCacheService and globalTimeoutService Each of them have their own send attributes too so you re not calling a global dispatch These changes can be worked around One could create a synthetic send inside the global store which called all the services send function manually But personally I prefer knowing exactly which services my messages are being passed to and it avoids having to keep events globally namespaced SummaryXState can work beautifully as a global store for a React application It keeps application logic co located treats side effects as first class citizens and offers good performance with useSelector You should choose this approach if you re keen on the Flux architecture but feel your app s logic is getting out of hand	2021-05-25 15:02:17
海外TECH	DEV Community	How to remove outside borders of a 3x3 grid using CSS, e.g. Tic-Tac-Toe UI	https://dev.to/pat_the99/how-to-remove-outside-borders-of-a-3x3-grid-using-css-e-g-tic-tac-toe-ui-4ao8	How to remove outside borders of a x grid using CSS e g Tic Tac Toe UII was trying to achieve this kind of UI when I tried implementing the Tic tac toe game I know it looks easy to some XD The challenge was how to properly select the first and last column as well as the first and last row I seriously did not want to manually remove the borders of the eight cells The data structure of my tic tac toe grid is not two dimensional but one so I can easily do the tricks below Think of my counting as this For the first row the top border should be removed thus board item nth child n border top none For the last column board div nth child n border right none For the first column board item nth child n border left none For the last row board item nth child n border bottom none And that is it Thanks for reading Check my tic tac toe game here	2021-05-25 15:01:43
Apple	AppleInsider - Frontpage News	Apple award-winning Fantastical gains new meeting integration features	https://appleinsider.com/articles/21/05/25/apple-award-winning-fantastical-gains-new-meeting-integration-features?utm_medium=rss	Apple award winning Fantastical gains new meeting integration featuresPremium Fantastical users now get the newly updated contacts app Cardhop for Mac iPhone and iPad which brings more meeting and invitation features to the calendar app Fantastical calendar subscribers now get the newly updated Cardhop contacts app in their subscriptionFlexibits winner of Apple s Mac App of the Year for calendar app Fantastical has revamped its subscription to add in its separate contacts app Cardhop The move comes alongside the release of a revised Cardhop which includes more integration into Fantastical Read more	2021-05-25 15:08:08
海外TECH	Engadget	Tidal's new Apple Watch app works without an iPhone nearby	https://www.engadget.com/tidal-apple-watch-app-151834758.html	offline	2021-05-25 15:18:34
海外TECH	Engadget	'Spy Alarm' turns your Switch into an invisible tripwire	https://www.engadget.com/nintendo-switch-spy-alarm-joy-con-sabec-150922558.html	calculator	2021-05-25 15:09:22
海外TECH	Engadget	Microsoft, the Linux Foundation, and others team up to make software sustainable	https://www.engadget.com/green-software-foundation-microsoft-build-linux-github-accenture-150050755.html	Microsoft the Linux Foundation and others team up to make software sustainableMicrosoft is still working to go fully carbon negative by the end of the decade but effectively grappling with climate change isn t just one company s responsibility As part of its virtual Build developer conference the folks in Redmond ーalong with Accenture GitHub ThoughtWorks and the Linux Foundation ーhave announced the launch of the Green Software Foundation to help make software engineering more sustainable	2021-05-25 15:00:50
海外科学	NYT > Science	Super Blood Moon and Lunar Eclipse 2021: When to Watch	https://www.nytimes.com/2021/05/25/science/lunar-eclipse-blood-moon-how-to-watch.html	super	2021-05-25 15:17:24
海外科学	NYT > Science	C.D.C. Will Not Investigate Mild Infections in Vaccinated Americans	https://www.nytimes.com/2021/05/25/health/coronavirus-breakthrough-infections.html	C D C Will Not Investigate Mild Infections in Vaccinated AmericansAt least vaccinated people were infected with the coronavirus through the end of April Now the agency has stopped pursuing the mildest cases	2021-05-25 15:15:25
海外科学	BBC News - Science & Environment	Global heating: Study shows impact of 'climate racism' in US	https://www.bbc.co.uk/news/science-environment-57235904	stress	2021-05-25 15:07:42
金融	◇◇　保険デイリーニュース　◇◇（損保担当者必携！）	保険デイリーニュース(05/26)	http://www.yanaharu.com/ins/?p=4581	msadhd	2021-05-25 15:37:20
金融	金融庁ホームページ	金融審議会「市場制度ワーキング・グループ」（第10回）議事次第について公表しました。	https://www.fsa.go.jp/singi/singi_kinyu/market-system/siryou/20210525.html	金融審議会	2021-05-25 17:00:00
金融	金融庁ホームページ	「基幹系システム・フロントランナー・サポートハブ」支援決定案件について公表しました。	https://www.fsa.go.jp/news/r2/sonota/20210525.html	決定	2021-05-25 15:30:00
ニュース	ジェトロ ビジネスニュース（通商弘報）	IEA、2050年までのCO2排出ネットゼロに向けたロードマップを公表	https://www.jetro.go.jp/biznews/2021/05/535878386db07d5d.html	排出	2021-05-25 15:40:00
ニュース	ジェトロ ビジネスニュース（通商弘報）	第1四半期の外国直接投資申請額は前年同期比2.4倍	https://www.jetro.go.jp/biznews/2021/05/eee53700fd0f60cc.html	前年同期	2021-05-25 15:30:00
ニュース	ジェトロ ビジネスニュース（通商弘報）	アルジェリア政府、アフリカ大陸自由貿易圏（AfCFTA）設立協定を批准	https://www.jetro.go.jp/biznews/2021/05/ebb5701e636bf56f.html	afcfta	2021-05-25 15:20:00
ニュース	ジェトロ ビジネスニュース（通商弘報）	タイと中国の貿易促進会合、貿易円滑化や博覧会出展を相互に要望	https://www.jetro.go.jp/biznews/2021/05/371a524e319a1e08.html	貿易	2021-05-25 15:10:00
ニュース	BBC News - Home	Covid: Eight Indian variant areas should avoid indoor gatherings	https://www.bbc.co.uk/news/uk-england-57232728	indian	2021-05-25 15:28:36
ニュース	BBC News - Home	Covid: Royal Bolton hospital taking 'urgent action' over virus	https://www.bbc.co.uk/news/uk-england-manchester-57242368	bolton	2021-05-25 15:35:08
ニュース	BBC News - Home	PM's burka comments gave impression of insensitivity - report	https://www.bbc.co.uk/news/uk-politics-57239483	islamophobia	2021-05-25 15:31:11
ニュース	BBC News - Home	Babes in the Wood victim's mum wants Martin Bashir inquiry	https://www.bbc.co.uk/news/uk-england-sussex-57242995	hadaway	2021-05-25 15:46:22
ニュース	BBC News - Home	Solskjaer eyes Europa League win to herald bright future for Man Utd	https://www.bbc.co.uk/sport/football/57224112	Solskjaer eyes Europa League win to herald bright future for Man UtdOle Gunnar Solskjaer says a Manchester United win over Villarreal in the Europa League final could be a stepping stone for a big future	2021-05-25 15:46:29
ビジネス	ダイヤモンド・オンライン - 新着記事	グーグル、ドイツ独禁当局が調査　新法で早期の改善命令も視野 - WSJ発	https://diamond.jp/articles/-/272305	改善命令	2021-05-26 00:20:00
ビジネス	ダイヤモンド・オンライン - 新着記事	米ロ首脳会談、6月にジュネーブで開催へ - WSJ発	https://diamond.jp/articles/-/272306	米ロ首脳会談	2021-05-26 00:17:00
ニュース	THE BRIDGE	終末期を迎えた中国の仮想通貨マイニングなど——中国ブロックチェーン界週間振り返り（5月17日〜5月25日）	http://feedproxy.google.com/~r/SdJapan/~3/rCv-jPRTtok/crypto-mining-armageddon-blockheads	終末期を迎えた中国の仮想通貨マイニングなどー中国ブロックチェーン界週間振り返り月日月日中国の仮想通貨マイニングは、政府トップ機関による業界の取り締まりを宣言した後、規制の逆風に備えている。	2021-05-25 15:15:16