投稿時間:2021-11-29 21:33:53 RSSフィード2021-11-29 21:00 分まとめ(37件)

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IT	ITmedia 総合記事一覧	[ITmedia News] リンガーハット、“強じんな需要予測AI”開発へ　「災害などあらゆる非常事態に対応できる」	https://www.itmedia.co.jp/news/articles/2111/29/news186.html	itmedia	2021-11-29 20:50:00
IT	ITmedia 総合記事一覧	[ITmedia News] ドコモが自社製B2B SaaSまとめたオンラインストア　中小向けに「はじめてのDX導入をサポート」	https://www.itmedia.co.jp/news/articles/2111/29/news185.html	bbsaas	2021-11-29 20:08:00
python	Pythonタグが付けられた新着投稿 - Qiita	量子情報理論の基本：Lattice Surgery	https://qiita.com/SamN/items/91c1f3d2e5b944fe0399	すべてのスタビライザーと可換な演算子を持ってこないといけないのですが、それをスタビライザーの積で構成してしまうとつまり式のスタビライザーに従属なものにしてしまうと、論理状態をまったく変化させませんので、これも論理演算子にはなり得ません。	2021-11-29 20:27:14
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	Zabbixでトリガーの値が正常な場合に、毎日メールを送信する方法はないのでしょうか。	https://teratail.com/questions/371529?rss=all	zabbix	2021-11-29 20:57:50
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	javaで二次元配列でコンソール上にオセロを作りたいのですが、駒が入力した座標と逆になり、上手くいきません！	https://teratail.com/questions/371528?rss=all	javaで二次元配列でコンソール上にオセロを作りたいのですが、駒が入力した座標と逆になり、上手くいきません前提・実現したいことjavaでオセロを作りたいです。	2021-11-29 20:54:14
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	PythonのchainerのLSTMで以前の学習結果を引き継ぎたい	https://teratail.com/questions/371527?rss=all	chainer	2021-11-29 20:53:55
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	githubでJavascriptが実装されない。（Weatherアプリ)	https://teratail.com/questions/371526?rss=all	同Codeはブラウザ上ではJavascriptが実装されるのですが、Githubを通すとブラウザでは画像のClickを押しても気温・湿度の表示がされません。	2021-11-29 20:41:44
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	多次元連想配列の作り方がわかりません	https://teratail.com/questions/371525?rss=all	多次元連想配列の作り方がわかりません前提・実現したいことPHPの出力に合わせて連想配列を作る問題をしているのですが、どのように取り掛かればいいのかがわかりません。	2021-11-29 20:26:13
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	Carbonライブラリでタイムゾーンの設定ができずにいます。。	https://teratail.com/questions/371524?rss=all	Carbonライブラリでタイムゾーンの設定ができずにいます。	2021-11-29 20:15:41
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	SASS(SCSS)のmixinにて構文警告が出てしまう	https://teratail.com/questions/371523?rss=all	SASSSCSSのmixinにて構文警告が出てしまうお世話になります。	2021-11-29 20:10:01
Program	[全てのタグ]の新着質問一覧｜teratail（テラテイル）	2次元配列の行成分の再確保について。	https://teratail.com/questions/371522?rss=all	次元配列の行成分の再確保について。	2021-11-29 20:01:45
Git	Gitタグが付けられた新着投稿 - Qiita	【Git】git pullを取り消したいときはgit resetじゃなくgit revertを使おう	https://qiita.com/kat0/items/f8dde16294d5f7bf18ed	【Git】gitpullを取り消したいときはgitresetじゃなくgitrevertを使おうgitresetは基本使わない間違えてgitpullしちゃったけどやっぱり取り消したいとき、調べるとgitresethardをすればいいよという記事をよく見かけた。	2021-11-29 20:49:40
海外TECH	MakeUseOf	How to Fix the Disk Is Write Protected USB Error	https://www.makeuseof.com/tag/how-to-fix-write-protection-errors-on-a-usb-stick/	error	2021-11-29 11:56:11
海外TECH	DEV Community	Jotai: The ultimate React State Management	https://dev.to/puruvj/jotai-the-ultimate-react-state-management-5cil	Jotai The ultimate React State ManagementJotai is a relatively new state management library for React It s simple but make no mistakes it s a robust library Jotai is based on the new Recoil pattern and library by Facebook More than half a decade ago Facebook created a pattern and library for state management in React called Flux On this pattern some non Facebook devs created a new library of their own that was more robust simpler to use and took the React world by storm This library is Redux Now Facebook has Recoil which has different ideologies than Flux The same is the case with Jotai and Redux Let s explore some of these Why Jotai Minimalistic API Jotai has a simple API design and is a joy to work with Tiny bundle size Jotai s footprint is really small and won t be a performance block in your site appLoaded to the brim Jotai comes with a lot ofPerformant Jotai is BLAZING FAST It s runtime performance is insane TYPESCRIPT First class TypeScript Support Comes with Typings pre installed and TypeScript authoring experience is beyond heavenly Ideological differences from ReduxJotai is very different from Redux and React Context API in almost every way But there s one central concept that is the catch allーthe one that you need to internalize Redux stores are monolithic but Jotai is atomic This means in Redux it s a pattern to store all the needed global state in the app in one single big object In Jotai it s the opposite You break your state into atoms i e one store for one single store or for closely related state Getting started with Jotai Installing Jotai pnpmpnpm add jotai npmnpm install jotai Or if you re a yarn personyarn add jotai Setting it up in the appJotai requires a provider to be present in the parent of the current component where it is being used The simplest way to do would be to wrap the whole app in the provider as shown below index jsx or index tsx import React from react import ReactDOM from react dom import App from App Jotai providerimport Provider from jotai ReactDOM render lt React StrictMode gt lt Provider gt lt App gt lt Provider gt lt React StrictMode gt document getElementById root Now you can use jotai anywhere in your app Basic syntaxNow that our basic setup is done let s have a look at the syntax Creating your first atomAtoms are the building blocks of universe and clump together into molecules No not that atom Jotai atoms are small isolated pieces of state Ideally one atom contains very small data although it s just a convention You could still put all your state in one atom though that would be very slow performance wise So here s how you create your first atomimport atom from jotai const themeAtom atom light And that s it You have your very first piece of state in Notice I suffixed my atom name with Atom as in themeAtom It s not a rule or an official convention I simply choose to name my atoms like this for clarity in a big project You can name it just theme rather than themeAtom Now how do you use it Well using it is a cross between the useState and useContext hooks import useAtom from jotai export const ThemeSwitcher gt const theme setTheme useAtom themeAtom return lt main gt theme lt main gt See Exactly like useState but the only difference is that the atom we created is to be passed to useState useAtom returns an array of size where the st element is a value and the nd element is a function to set the value of the atom This makes all the components relying on this atom update and re render So if we put it all together the complete code would look like this import atom useAtom from jotai const themeAtom atom light export const ThemeSwitcher gt const theme setTheme useAtom themeAtom return lt main gt theme lt main gt And notice the setTheme isn t used yet Let s change that import atom useAtom from jotai const themeAtom atom light export const ThemeSwitcher gt const theme setTheme useAtom themeAtom return lt main gt lt p gt Theme is theme lt p gt lt button onClick gt setTheme theme light dark light gt Toggle Theme lt button gt lt main gt Check it out CodeSandboxThis my friend is just the beginning Jotai can do so much more But this alone doesn t give much perspective What s special about a button that toggles a value And I agree This example is pretty boring Let s use Jotai to make an actual theme switcher Jotai In Practice Theme Switcher hookNowadays theme switching is needed in every single app website and heck even blog sites Especially blogs And it can be quite daunting to make a theme switcher First you have to set up your CSS Variables Then you have to start with a theme post which you have to make a button that switches the theme Then you have to make sure to remember the preference using localstorage API But that brings you full circle to picking up the right value when the page loads and also not messing with SSR and prerendering and Yeah it s pretty complicated A problem any developer would dread before attempting I did So that s the best kind of thing to make and let s use Jotai to do it You ll be astonished at how simple Jotai can make it So here are our goals Works on server side As in not referring to document or window without protection Picks up locally stored value in localstorage If no local value tries to get the device preference whether the device theme is light or dark Current theme should be available as a state that re renders components it is being used in Changing the state should update localstorage accordingly So now that our list is complete let s look at the code import atom useAtom from jotai import useEffect from react const browser typeof window undefined const localValue browser localStorage getItem theme light const systemTheme browser amp amp matchMedia prefers color scheme dark matches dark light The atom to hold the value goes hereconst themeAtom atom localValue systemTheme Sitewide theme export function useTheme const theme setTheme useAtom themeAtom useEffect gt if browser return localStorage setItem theme theme document body classList remove light dark document body classList add theme theme return theme setTheme A lot going on here So here s the breakdown We check whether the current code is running in the browser or not If we re running the code in SSR or prerendering this value will be false We get the value stored in localstorage If localstorage has the theme in it then we ll consider it the highest priority as it would be the one chosen by the user Also because there s no localstorage in Node we have to fallback to the default value of light if it s running in the SSR mode We also retrieve the device preference using prefers color scheme dark in case the localstorage value doesn t exist Again this falls back to value light if device preference is dark or code is running in SSR Finally create the atom This will be our main store where we actually store the current theme usable and changeable as state Notice the value we give it localValue systemTheme Here s what can happen with these values If running in SSR Prerendering mode localValue light and systemTheme light localValue systemTheme will turn out to be light So important point here Your app in SSR will be themed with light theme so if you prerender your app it will end up with light theme in terms of plain HTML As the JavaScript loads it will sync to the most relevant theme possible Why didn t I just put the localValue and systemTheme variables inside the hook The reason If I put them in the hook everytime the hook is initialized in any component or a component re renders this hook will run again and will fetch these values again from localstorage and media queries These are pretty fast but localstorage is blocking and when used a lot can introduce jank So we initialize these vars once in the lifetime of the app because we need these only to get the initial value Finally let s begin our hook Let s make this atom a local state using useAtom const theme setTheme useAtom themeAtom These will be our theme in the form of state Themes can be modified using setTheme Next thing we got the most important part of our hook that will actually make the current theme known to our CSS useEffect gt if browser return localStorage setItem theme theme document body classList remove light dark document body classList add theme theme It s useEffect that runs whenever theme changes as you can see in the array in the nd argument When this runs it checks if the code is running in the browser If it isn t it simply stops further execution by doing a return If it is successful it goes on and removes all the classes corresponding to put themes on lt body gt then it adds the class corresponding to the latest value of theme variable Finally we return the theme setTheme pair as it is so we can use it just like we use useState You could also return these as objects theme setTheme giving them explicit naming This is it for this hook And I got my TypeScript kin covered too import atom useAtom from jotai import useEffect from react export type Theme light dark const browser typeof window undefined const localValue browser localStorage getItem theme light as Theme const systemTheme Theme browser amp amp matchMedia prefers color scheme dark matches dark light The atom to hold the value goes hereconst themeAtom atom lt Theme gt localValue systemTheme Sitewide theme export function useTheme const theme setTheme useAtom themeAtom useEffect gt if browser return localStorage setItem theme theme document body classList remove light dark document body classList add theme theme return theme setTheme as const So this is the final code we got for switching themes robustly This hook is simple and understandable I hope due to the simplicity of Jotai But here s the thing We haven t saved much code using Jotai compared to using the Context API That code would be almost this simple just have a little more boilerplate So there really isn t much difference here But here comes a twist We can get rid of even more code by using something that Jotai provides atomWithStorageWe can move the logic of syncing to localstorage completely both from inside the hook as well as outside Rewriting the hook with atomWithStorageatomWithStorage is a special kind of atom that automatically syncs the value provided to it with localstorage or sessionStorage Or AsyncStorage if used with React Native and picks the value upon the first load automatically It s available in the jotai utils module and adds some bytes other than the KB of Jotai Core So here s how we would rewrite it import useAtom from jotai import atomWithStorage from jotai utils import useEffect from react const browser typeof window undefined The atom to hold the value goes hereconst themeAtom atomWithStorage theme browser amp amp matchMedia prefers color scheme dark matches dark light Sitewide theme export function useTheme const theme setTheme useAtom themeAtom useEffect gt if browser return document body classList remove light dark document body classList add theme theme return theme setTheme As you can see we completely got rid of localstorage from the code and we have a new thing atomWithStorage First argument is the key to store it in localstorage As in if you specified theme as value here you would retrieve it from localstorage using localstorage getItem theme As you can see the code itself isn t much smaller in terms on lines of code It s just smaller which isn t a big number in case of this already small file The main part here is that we got to hide the complexity away thanks to atomWithStorage Now we don t have to keep the local value storage in mind just have to focus on our main logic and remember that this value is synchronized locally and that s it And using this hook ultimately is super simple import useTheme from use theme export const ThemeSwitcher gt const theme setTheme useTheme return lt main gt lt p gt Theme is theme lt p gt lt button onClick gt setTheme theme light dark light gt Toggle Theme lt button gt lt main gt And it just works 🪄 More about JotaiSo this was the basic intro to Jotai I added in the atomWithStorage utility function to show how powerful and simple it can make your code I will touch on these utilities later on For now let s explore more about the basic atom and useAtom and how they give you superpowers Derived atomsSometimes you want to make an atom rely on another atom s meaning you want to compose multiple atoms together into one big computed atom That is extremely simple with Jotai Readonly atomsReadonly atoms are derived atoms that rely on other atoms and we can t change their values directly For example these atoms usage would be as follows const derivedValue useAtom derivedAtom There s no setDerivedValue here no setter function We can only read this atom Changing the atoms it is derived from will automatically update this value But enough talk Now let s see how to create these derived atoms You have seen this atom until now const store atom someValue But guess what Atoms can take a function as a parameter const store atom get gt get someAtomDefinedSomewhere Here instead of a raw value we pass a callback This callback has a parameter get which allows you to access the raw live values of other atoms With this raw value you can do anything Multiply it concatenate it map it reduce it whatever The sky s the limit And you can do a lot more with this For example one simple example would be to have a list of all the keys of an object that match a specific criteria to be in an array Here s the objectexport const appsStateStore atom finder false launchpad false safari false messages false mail true maps true photos false facetime true calendar false Define the atom that will hold the open apps in an array const openAppsStore atom get gt const apps get openAppsStore Gives the raw value finder false launchpad false Filter out the values who are marked as false const openAppsList Object keys apps filter appName gt apps appName return openAppsList And this is it As you tweak the values in the appStateStore setting them to true and false the openAppsStore will reflect the changes and the components using this store will also be updated with new values You can also compose together many different atoms together const xCoordinateAtom atom const yCoordinateAtom atom Compose em allconst distanceFromOriginAtom atom get gt Math sqrt get xCoordinateAtom get yCoordinateAtom You can tweak the xCoordinateAtom atom and yCoordinateAtom and the distanceFromOriginAtom will update with the new values It s a mathematical formula to calculate the distance of a point from the origin If you didn t get it no worries I just want to get the point across that you can compose together different atoms seamlessly That s it Readable amp Writable atomsThese are atoms that are derived from other atoms but can also be modified on their own by the user const readWriteAtom atom get gt get priceAtom get set newPrice gt set priceAtom newPrice you can set as many atoms as you want at the same time This atom when you set its value triggers the custom write function we provide and can modify the atoms it relies on It s basically two way data binding You change priceAtom this readWriteAtom gets updated You update readWriteAtom priceAtom gets updated Mindblowing right Beware though As magical as this seems it s two way data binding There have been controversies in the past about it and rightfully so as debugging and keeping the flow of data sane becomes extremely hard with these That s why React itself has only one way data binding So use this atom carefully Async AtomsFrom this point we enter a very dangerous territory Async rendering aka React Suspense Sometimes your atoms have to be asynchronous that is rather than getting values instantly they pull from a remote source using fetch which is when you have to suspend the rendering and wait for the data to come back Here s a little code demonstration of using async atom const fetchCountAtom atom get gt get countAtom async get set url gt const response await fetch url set countAtom await response json count function Controls const count compute useAtom fetchCountAtom return lt button onClick gt compute gt compute lt button gt But this above won t work if you don t wrap Controls in a Suspense lt Suspense fallback lt span gt gt lt Controls gt lt Suspense gt Async Atoms are extremely useful in building real world apps because these apps are mostly CRUD apps with data fetching added in The Best of UtilsIf you loved atomWithStorage and your head is spinning with all the possibilities it could unlock I got many more awesome Jotai utils for you atomWithStorageI covered this one in the very beginning of the article when I refactored the useTheme hook to use this special atom It accepts a key The name by which it is stored in localstorage and the initial value Then you change this atom and its value will be persisted locally and picked up after the page reloads import atomWithStorage from jotai utils const darkModeAtom atomWithStorage darkMode false This atom is also SSR friendly so you can SSR your app away with absolutely no issues This atom can store value in sessionStorage too so the atom s value will be persisted until the browser is closed Handy if you re building a banking web app where having short sessions is preferable It also works with React Native so it s pretty much universal atomWithResetSometimes you need to reset your state to what it was originally Traditionally the way to do that has been to store the initial value in a variable create a state with that variable as the value and when needed setState back to that initial value The code would look like this import atom useAtom from jotai const initialValue light const themeAtom atom initialValue function ThemeSwitcher const theme setTheme useAtom themeAtom const toggleTheme gt setTheme theme light dark light const resetTheme gt setTheme initialValue return lt gt lt button onClick toggleTheme gt Toggle theme lt button gt lt button onClick resetTheme gt Reset theme lt button gt lt gt This is fairly easy but here s a more Jotai ish way of doing the same thing import useAtom from jotai import atomWithReset useResetAtom from jotai utils const themeAtom atomWithReset light function ThemeSwitcher const theme setTheme useAtom themeAtom const reset useResetAtom themeAtom const toggleTheme gt setTheme theme light dark light return lt gt lt button onClick toggleTheme gt Toggle theme lt button gt lt button onClick reset gt Reset theme lt button gt lt gt As you can see we simplified our component a little Not much in this case as it s a very simple example But I personally have used this reset atom in my apps with full blown complex logic based components and it just makes the code much more sane idiomatic and bug free selectAtomIf there was a coolness counter for libraries and frameworks Jotai alone would ve broken it with this little util Let s consider you have a big object const defaultPerson name first Jane last Doe birth year month Jan day time hour minute Original atom const personAtom atom defaultPerson And say a lot of components rely on this specific atom but need only parts of this The thing is when you update this atom all the components relying on this atom will rerender Even if you change just the birth time minute the whole thing is going to count as an update and all the components will re render This is how React works unfortunately But worry not for Jotai has a solution for this too selectAtom allows you to create a derived atom with only a subpath of the whole object const firstNameAtom selectAtom personAtom person gt person name first firstNameAtom is a read only derived atom that only triggers when the person name first property changes and it holds the value of person name first You can update the birth time hour field By updating the whole atom with new values and the component relying on firstNameAtom will remain unchanged Amazing right Applying on ObjectsThere arises a problem If you listen to a field that is an object person birth this atom isn t gonna be very efficient Jotai uses the equality check to check if the atom s part is changed or not and should be re rendered The thing is no objects are ever the same The checks objects by reference not values So basically this atom is pretty useless in that scenario But not quite You can provide a rd argument to this selectAtom which is your own version of an equality check You can write your custom function to check the objects const birthAtom selectAtom personAtom person gt person birth deepEqual OFC writing your own deepEqual is hard so it s recommended to go with lodash es s isEqual function import isEqual from lodash es const birthAtom selectAtom personAtom person gt person birth isEqual If seeing lodash gives you anxiety about bundle size I assure you isEqual of lodash es is tree shakeable just KB minified and even smaller in gzip brotli So no worries This can take the performance of your app from zero to hero Literally freezeAtomimport atom from jotai import freezeAtom from jotai utils const objAtom freezeAtom atom count freezeAtom takes an existing atom and returns a new derived atom The returned atom is frozen which means when you use the atom with useAtom in components or get in other atoms the atom value will be deeply frozen with Object freeze It would be useful to find bugs where you accidentally tried to mutate objects which can lead to unexpected behavior This atom is mostly for debuggability for when you mutate an object state which you aren t supposed to do in React but hey we re all humans This is such a common case that I m really glad Jotai folks are providing such high quality debugging tools waitForAllRemember the section above about Async atoms This util is for that and quite a handy one it is const dogsAtom atom async get gt const response await fetch dogs return await response json const catsAtom atom async get gt const response await fetch cats return await response json const App gt const dogs useAtom dogsAtom const cats useAtom catsAtom So you have these async atoms and you re using them in the app All fine But there s a little problem here The component will wait for the first atom dogsAtom to go fetch data return then it will move to the next atom catsAtom We don t want this Both these atoms are independent of each other we should rather fetch them in parallel Or concurrently if you are a hardcore JavaScripter So we basically want to do something like an await Promise all on these atoms The way to do that is using the waitForAll util After using our code becomes const dogsAtom atom async get gt const response await fetch dogs return await response json const catsAtom atom async get gt const response await fetch cats return await response json const App gt const dogs cats useAtom waitForAll dogsAtom catsAtom Now it waits for both of them to resolve and then returns an array of the data returned by both Kind of like an await Promise all statement Literally at this point React should absorb Jotai into itself it s way too good And these are only half of all utils provided by Jotai There are so many I d could write a whole book about it Head over to Jotai Documentation to learn about em Jotai is good with its relatives Jotai isn t anything like other libraries which are like You shall only have me in thy package json No Jotai doesn t work like that Jotai itself is a great state management library but it also allows you to seamlessly integrate with other state management libraries Here are all the official integrations that come with Jotai ImmerOpticsReact QueryXStateValtioZustandReduxURQLNow at this point the blog post is already way too lengthy to cover the above integrations but I want to cover Immer Why Because of the biggest pain point with React state Immutability Immutability is great and it makes wrapping your head around React State easy but it can make things very hard when your state is an object Then you have to do the whole song and dance of spreading the object and merging with the properties you want to update function UpdateUser const user setUser useState id name Luke Skywalker dob new Date December BBY Update the dob const updateDob gt setUser user dob new Date November ABY return lt button onClick updateDob gt Update DOB lt button gt As you can see in the updateDob method we have to spread the original object and pass the field we want to update This is OK But what if the object is many levels deep and we want to update an object very deep It becomes so convoluted that I personally never even tried it I just re architected my state to be shallower in some way and then update that I am more of a Svelte person than a React person and in Svelte you can simply mutate the state and it just works user dob new Date November ABY And it goes extremely deep too state depth depth depth depth something So all the song and dance required in React always felt wrong to me But this is where Immer comes in Immer allows you to directly mutate the state and it just works Take a look for yourselfimport atomWithImmer from jotai immer const userAtom atomWithImmer id name Luke Skywalker dob new Date December BBY function UpdateUser const user setUser useAtom userAtom Update the dob const updateDob gt setUser user gt user dob new Date November ABY return user return lt button onClick updateDob gt Update DOB lt button gt Here the setUser works differently It s a callback that passes you the current value of the state This value is a copy of the original value You can mutate this copy as much as you want inside the callback and finally just return it Jotai and Immer will automatically reconcile the changes without any of the bugs that come with mutating Freaking awesome ConclusionAlright This was a lengthy article Congratulate yourself for making it to the end skimming through counts too This article is just a little glimpse of Jotai There s so much more at Jotai docs You should definitely check them out Peace out️	2021-11-29 11:40:24
海外TECH	DEV Community	Crafting a stunning CRUD application with MERN stack	https://dev.to/aviyel/crafting-a-stunning-crud-application-with-mern-stack-i1d	Crafting a stunning CRUD application with MERN stackIn this blog tutorial we will set up a full stack app to perform CRUD operations using the MERN stack MongoDB for the database Express and Node for the backend and React as the frontend This blog tutorial should help you understand the basic MERN stack CRUD operations Here s a look at the final version of our application Setting up FrontendWe ll start by setting up our frontend first using create react app So without further ado let s get started Create a two folder name client and server inside your project directory then open it in Visual Studio Code or any code editor of your choice We will be building the UI and its functionalities from absolute ground level Now lets start and craft our application Installing react applicationLet us begin with the frontend part and craft it using react So if Node js isn t already installed on your system the first thing you should do is install it So go to the official Node js website and install the correct and appropriate version We need node js so that we can use the node package manager also known as NPM Now open client folder inside the code editor of your choice For this tutorial I will be using VScode Next step let s open the integrated terminal and type npx create react app this command will create the app inside the current directory and that application will be named as clientIt usually takes only a few minutes to install Normally we would use npm to download packages into the project but in this case we are using npx the package runner which will download and configure everything for us so that we can start with an amazing template It s now time to start our development server so simply type npm start and the browser will automatically open react app Now within the client folder install the following dependencies npm i axios react router domThe package json file should look like this after the dependencies have been installed name client version private true dependencies testing library jest dom testing library react testing library user event axios react react dom react router dom react scripts web vitals scripts start react scripts start build react scripts build test react scripts test eject react scripts eject eslintConfig extends react app react app jest browserslist production gt not dead not op mini all development last chrome version last firefox version last safari version Project cleanupBefore we begin building our projects we must first clean them up by removing some of the files provided by create react app Your src files should look like this after you ve cleaned them upNow within the src folder make another folder called components and within that folder make three folder components DisplayTodo CreateTodo TodoLists and UpdateTodo DisplayTodoTo begin we will create the DisplayTodo component which will read all of the documents created The first step is import the react useState and useEffect hooks and then import axios from the Axios package  We will retrieve documents from the database and store them in the state todoData in the DisplayTodo function component To retrieve the document we will use axios to send a GET request to the backend When we receive the data we will use setTodoData to store it in todoData and log it If we receive an error we will also log it Because we want the data to load when the page loads we ll make the GET request from the useEffect hook components DisplayTodo jsimport useState useEffect from react import axios from axios import Link from react router dom import TodoLists from TodoLists const DisplayTodo gt const infoTodo setInfoTodo useState useEffect gt axios get http localhost api todoapp then res gt console log res data setInfoTodo res data catch err gt console log err const deleteHandler e gt axios delete http localhost api todoapp e target name setInfoTodo data gt return data filter todo gt todo id e target name return lt section className todo container gt lt Link to add todo className todo btn new gt lt button className todo btn gt Add new todo lt button gt lt Link gt lt section className todo data gt lt h gt lt h gt lt ul className todo list block gt infoTodo map data gt lt TodoCard data data deleteHandler deleteHandler gt lt ul gt lt section gt lt section gt export default DisplayTodo TodoListThen we ll make the TodoList component to display the todo s contents We will iterate over todoData and pass the contents to TodoList which will display the contents of each to do document components TodoList jsimport React from react const TodoList todoInfos deleteHandler gt const id tilte description todoInfos return lt li key id gt lt div className title description gt lt h gt title lt h gt lt p gt description lt p gt lt div gt lt div className button container gt lt button name id className button gt ️ lt button gt lt button name id className button onClick deleteHandler gt ️ lt button gt lt div gt lt li gt CreateTodoTo create a new todo we will use axios to send a POST request to our server So let s import the react useState hook and after that import the Link from react router dom Now create a function handler change that and you ll get the input data again create a new function handler Finally Submitting this will cause the POST request to be sent to the server Declare data using the useState hook and the JSON below description title When the input changes we will update the data in the handleChange method We ll call setTodoInfo and declare an arrow function inside that will copy the previous data s contents if any exist In this case e target name will be the name of the input element which will either have a title or a description In the submitHanlder method To prevent the page from reloading when the submit button is clicked use e preventDefault Send the data in the form of a POST request to the server If the data was successfully transmitted to the server the state data should be reset components CreateTodo jsimport useState from react import axios from axios const CreateTodo gt const todoInfo setTodoInfo useState title description function handleChange e setTodoInfo data gt data e target name e target value function handleSubmit e e preventDefault axios post http localhost api todoapp todoInfo then res gt setTodoInfo title description console log res data message catch err gt console log Error couldn t create TODO console log err message return lt section className container gt lt button type button className todo btn todo btn back gt back lt button gt lt section className todo data gt lt form onSubmit handleSubmit className form container noValidate gt lt label className label htmlFor title gt Todo Title lt label gt lt input type text name title value todoInfo title onChange handleChange className input gt lt label className label htmlFor description gt Describe it lt label gt lt input type textarea name description value todoInfo description onChange handleChange className input gt lt button type submit className todo btn gt create todo lt button gt lt form gt lt section gt lt section gt export default CreateTodo Now let s define a deleteHandler function inside DisplayTodo component that will send a DELETE request to the server To delete a document from the database this function will require the document s id It will also add the filtered array to the array todo TodoList component accepts the deleteHandler method as a parameter TodoList component should be updated to include the deleteHandler parameter Add a onClick event for the delete button and pass the deleteHandler method as a parameter After making the aforementioned changes the code will look something like this components DisplayTodo jsimport useState useEffect from react import axios from axios import TodoLists from TodoLists const DisplayTodo gt const infoTodo setInfoTodo useState const id setId useState const update setUpdate useState false const infoTodo setInfoTodo useState const modal setModal useState false useEffect gt axios get http localhost api todo then res gt console log res data setInfoTodo res data catch err gt console log err const updateHandler gt setUpdate update const closeHandler gt setId setModal false const deleteHandler e gt axios delete http localhost api todo e target name setInfoTodo data gt return data filter todo gt todo id e target name return lt section className container gt lt button className todo btn gt Add new todo lt button gt lt section className todo data gt lt h gt lt h gt lt ul className todo list block gt infoTodo map todoInfo index gt lt TodoLists key index todoInfos todoInfo deleteHandler deleteHandler gt lt ul gt lt section gt modal lt section className update container gt lt div className update todo data gt lt p onClick closeHandler className close gt amp times lt p gt lt div gt lt section gt lt section gt export default DisplayTodo TodoList component should look something like this components TodoList jsimport React from react const TodoLists todoInfos gt const id title description todoInfos return lt li key id gt lt div className title description gt lt h gt title lt h gt lt h gt lt h gt lt p gt description lt p gt lt div gt lt h gt lt h gt lt div className todo btn container gt lt button className todo btn name id gt ️ lt button gt lt button className todo btn name id gt ️ lt button gt lt div gt lt li gt export default TodoLists We must first update the App js file before we can use the CreateTodo component BrowserRouter and Route should be imported from react router dom Import the CreateTodo component from the components createTodo directory Create a Route for the home page and pass the ShowTodoList component through it and make a Route for adding a new todo add list and wrap the Routes within the BrowserRouter After you ve made the changes the App js file should look like this App jsimport BrowserRouter Route from react router dom import DisplayTodo from components DisplayTodo import CreateTodo from components CreateTodo import App css function App return lt div className todo Container gt lt BrowserRouter gt lt Route exact path component DisplayTodo gt lt Route path add list component CreateTodo gt lt BrowserRouter gt lt div gt export default App Now import the Link from react router dom and wrap a button within a Link tag After you ve made the changes the DisplayTodo should look like this components DisplayTodo jsimport useState useEffect from react import axios from axios import Link from react router dom import TodoLists from TodoLists export function DisplayTodo const id setId useState const update setUpdate useState false const infoTodo setInfoTodo useState const modal setModal useState false useEffect function axios get http localhost api todoapp then res gt setInfoTodo res data catch err gt console log err message update const editHandler e gt setId e target name setModal true const updateHandler gt setUpdate update const deleteHandler e gt axios delete http localhost api todoapp e target name setInfoTodo data gt return data filter todo gt todo id e target name const closeHandler gt setId setModal false return lt section className container gt lt Link to add list className button new gt lt button className todo btn gt Add new todo lt button gt lt Link gt lt section className todo data gt lt h gt lt h gt lt ul className todo list block gt infoTodo map todoInfo index gt lt TodoLists key index todoInfos todoInfo editHandler editHandler deleteHandler deleteHandler gt lt ul gt lt section gt modal lt section className update container gt lt div className update todo data gt lt p onClick closeHandler className close gt amp times lt p gt lt div gt lt section gt lt section gt export default DisplayTodo Now again import the Link from react router dom and wrap a button within a Link tag After you ve made the changes the CreateTodo should look like this components CreateTodo jsimport useState from react import Link from react router dom import axios from axios const CreateTodo gt const todoInfo setTodoInfo useState title description function handleChange e setTodoInfo data gt data e target name e target value function handleSubmit e e preventDefault axios post http localhost api todoapp todoInfo then res gt setTodoInfo title description console log res data message catch err gt console log Error couldn t create TODO console log err message return lt section className container gt lt Link to gt lt button type button className todo btn todo btn back gt back lt button gt lt Link gt lt section className todo data gt lt form onSubmit handleSubmit className form container noValidate gt lt label className label htmlFor title gt Todo Title lt label gt lt input type text name title value todoInfo title onChange handleChange className input gt lt label className label htmlFor description gt Describe it lt label gt lt input type textarea name description value todoInfo description onChange handleChange className input gt lt button type submit className todo btn gt create todo lt button gt lt form gt lt section gt lt section gt export default CreateTodo Now import the useState from react and import axios from the axios package Finally The UpdateTodo component will have three properties id closeHandler updateHandler The UpdateTodo component may look something like this components UpdateTodo jsimport useState from react import axios from axios function UpdateTodo id closeHandler updateHandler const todoInfo setTodoInfo useState title description const handleChange e gt setTodoInfo data gt data e target name e target value const submitHanlder e gt e preventDefault axios put http localhost api todoapp id todoInfo then res gt setTodoInfo title description catch err gt console error err return lt form className form container onSubmit e gt submitHanlder e updateHandler closeHandler gt lt label htmlFor title className label gt Todo Title lt label gt lt input type text name title className input onChange handleChange gt lt label htmlFor description className label gt Todo Description lt label gt lt input type textarea name description className input onChange handleChange gt lt button type submit className todo btn gt Add lt button gt lt form gt export default UpdateTodo Import the UpdateTodo component from UpdateTodo js and then declare modal with the useState hook which is set to false by default  The modal value will be either true or false  The UpdateTodo component will be rendered conditionally if the edit button is pressed on any of the todo  we will set setModal to true when the UpdateTodo component is rendered  and then declare id using the useState hook  The  id of the todo  that needs to be updated will be saved It will be passed to the UpdateTodo component as a prop Use the useState hook to declare an update This will be used to retrieve all of the to do items from the database When a todo document is updated the update will toggle between true and false Now define a function editHandler this function will replace the state id with the document s id and set the modal state to true Next create a function called updateHandler If the todo has been updated by the user this will invert the state of the update Inverting the state will cause the useEffect hook to update the todo array Finally define a function closeHandler which will be used to close the UpdateTodo component This will set the id to an empty string and the modal property to false After you ve made the changes the DisplayTodo and TodoList should look like this components DisplayTodo jsimport useState useEffect from react import axios from axios import Link from react router dom import UpdateTodo from UpdateTodo import TodoLists from TodoLists export function DisplayTodo const id setId useState const update setUpdate useState false const infoTodo setInfoTodo useState const modal setModal useState false useEffect function axios get http localhost api todoapp then res gt setInfoTodo res data catch err gt console log err message update const editHandler e gt setId e target name setModal true const updateHandler gt setUpdate update const deleteHandler e gt axios delete http localhost api todoapp e target name setInfoTodo data gt return data filter todo gt todo id e target name const closeHandler gt setId setModal false return lt section className container gt lt Link to add list className button new gt lt button className todo btn gt Add new todo lt button gt lt Link gt lt section className todo data gt lt h gt lt h gt lt ul className todo list block gt infoTodo map todoInfo index gt lt TodoLists key index todoInfos todoInfo editHandler editHandler deleteHandler deleteHandler gt lt ul gt lt section gt modal lt section className update container gt lt div className update todo data gt lt p onClick closeHandler className close gt amp times lt p gt lt UpdateTodo id id closeHandler closeHandler updateHandler updateHandler gt lt div gt lt section gt lt section gt export default DisplayTodo components TodoList jsimport React from react const TodoLists todoInfos editHandler deleteHandler gt const id title description todoInfos return lt li key id gt lt div className title description gt lt h gt title lt h gt lt h gt lt h gt lt p gt description lt p gt lt div gt lt h gt lt h gt lt div className todo btn container gt lt button className todo btn name id onClick editHandler gt ️ lt button gt lt button className todo btn name id onClick deleteHandler gt ️ lt button gt lt div gt lt li gt export default TodoLists Finally let s incorporate some styles into our project Now go to your App css file and update your style or simply copy and paste the following CSS code Setting up BackendNow we ll start by setting up our backend with npm and installing relevant packages then set up a MongoDB database then set up a server with Node and Express then design a database schema to define a Todo and then set up API routes to create read update and delete documents from the database Now go to your server directory and use the command prompt to run the code below npm init y Updating package jsonTo install the dependencies use the following instructions in the terminal npm install cors express dotenv mongoose nodemonThe package json file should look like this after the dependencies have been installed name server version description main index js scripts start nodemon main js keywords author license ISC dependencies cors dotenv express mongoose nodemon And also remember to update the scripts as well Structuring the folder inside the server configurations Make a file called database js in the config folder The necessary code for connecting to the MongoDB database will be contained in this file controllers The files in the controllers folder will contain the methods for the endpoints to interface with the database models The files that specify the MongoDB schema will be found in the model s folder routers The files with the endpoints will be found in the routers folder Configuring main jsImport express module Use express to start our app Using the app create a get method for the endpoint http localhost For our server to run set the PORT to Using our app you may listen to PORT const express require express const cors require cors const dotenv require dotenv dotenv config const app express const PORT process env PORT listenapp listen PORT gt console log Server is running on http localhost PORT Now open your env file or create one if you don t have one and paste the following code inside it PORT Now use the following code to start the server with nodemon Ensure that the following command is executed from the project directory npm startIf the server has started successfully the terminal should display the following message Getting started with MongoDBSo what is MongoDB MongoDB is an open source cross platform document oriented database program MongoDB is a NoSQL database that uses JSON like documents and optional schemas to store data MongoDB is a database developed by MongoDB Inc and published under the terms of the Server Side Public License Sign in to MongoDBMake a new project Create a ProjectBuilding a databaseCreating a clusterSelecting a cloud service providerMake a cluster and wait for the cluster to be built before proceeding usually takes around minutes Allow access from anywhere by clicking connect Then IP address should be added In the database create a user You ll need the username and password for the MongoDB URI and finally create a database user Now select the Choose a connection method Connect your application by clicking on it and finally select the correct driver and version Insert mongodb srv into the env file PORT DATABASE URL mongodb srv pramit lt password gt cluster qjvl mongodb net myFirstDatabase retryWrites true amp w majorityNow open the database js file located inside the configurations folder and make the modifications listed below Import Mongoose module Import dotenv package and configure it Create DATABASE URL inside env file and add your credential inside it and then you are able to import it from the env file Importing dotenv moduleDefine the databaseConfiguration method for establishing a database connection The databaseConfiguration method should be exported and called in main js Now database js file should resemble something like this database jsconst mongoose require mongoose const dotenv require dotenv dotenv config const databaseURL process env DATABASE URL const databaseConfiguration async gt try await mongoose connect databaseURL useNewUrlParser true useUnifiedTopology true console log Database connected catch err console log err process exit module exports databaseConfiguration Add the following changes on main js file main jsconst express require express const cors require cors const databaseConfiguration require configurations database js const dotenv require dotenv dotenv config const app express const PORT process env PORT connecting to the mongodb databasedatabaseConfiguration add the middlewaresapp use express json extended false app get req res gt res send lt h gt Server is up and running lt h gt listenapp listen PORT gt console log Server is running on http localhost PORT Adding database schema Add a models js file inside the models folder We will define the entire database schema inside this particular file models jsconst mongoose require mongoose const TodoListSchema new mongoose Schema title type String required true description type String date type Date default Date now const Todo mongoose model todo TodoListSchema module exports Todo Defining the entire endpoint of our API todo routes jsconst express require express const router express Router const listAllTodo createOneTodo updateOneTodo deleteTodo require controllers todo controller js router get listAllTodo router post createOneTodo router put id updateOneTodo router delete id deleteTodo module exports router Defining the methods for endpointThe methods for the endpoints will be defined in the controllers folder and inside controllers js file Now open the controllers js file located inside the controllers folder and make the modifications listed below controllers jsconst AppTodo require models models js exports createOneTodo req res gt AppTodo create req body then todo gt console log todo res json message Cheers You have successfully added TODO todo catch err gt res status json message Sorry your todo list cannot be added error err message exports listAllTodo req res gt AppTodo find then todo gt console log todo res json todo catch err gt res status json message There isnt any todo available error err message exports updateOneTodo req res gt AppTodo findByIdAndUpdate req params id req body then todo gt console log todo return res json message Cheers You have successfully updated TODO todo catch err gt res status json message Sorry your todo list cannot be updated error err message exports deleteTodo req res gt AppTodo findByIdAndRemove req params id req body then todo gt console log todo res json message Cheers You have successfully deleted your TODO todo catch err gt res status json message Sorry your todo is not there error err message Finally add the endpoint to the main js file Also don t forget to include the cors so that we can make API calls from the frontend application As a result your main js file should look something like this main jsconst express require express const cors require cors const databaseConfiguration require configurations database js const todo require routes todo routes js const dotenv require dotenv dotenv config const app express const PORT process env PORT connecting to mongodb databaseConfiguration adding corsapp use cors origin true credentials true adding middlewaresapp use express json extended false app get req res gt res send Hello there Cheers The server is up and running using the todo routesapp use api todoapp todo listenapp listen PORT gt console log Server is running on http localhost PORT After restarting the server you should see something similar to this Finally start both the client and the server and you should see something similar to this The complete source code for the application can be found here ConclusionThis blog tutorial demonstrated how to use the MERN stack to build a basic React Todo CRUD application This concise guide went over the essential MERN stack topics one by one focusing on each one carefully and discreetly You learned how to establish a basic react app style it with necessary npm packages and make HTTP queries related to the crud app we also set up the node back end server in the react app using necessary npm packages We used MongoDB to save and store the data and learned how to use the React platform to store the data and this lesson might have been very helpful for you if you are new to MERN stack development Cheers Happy coding Main article available here gt Happy Coding Follow aviyelHQ or sign up on Aviyel for early access if you are a project maintainer contributor or just an Open Source enthusiast Join Aviyel s Discord gt Aviyel s worldTwitter gt	2021-11-29 11:24:54
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them Buy Kindle Paperwhite at Amazon Buy Kindle at Amazon Instant PotThe six quart Instant Pot Duo Plus remains on sale for which is half off its normal price This model supports pressure cook warm sauté rice cook sous vide and more modes and its mid size capacity makes it good for preparing food for many people Buy Instant Pot Duo Plus at Best Buy Amazon Echo Show EngadgetThe Echo Show smart display is on sale for It earned a score of from us for its attractive design stellar audio quality and improved camera for video calls Both the first and second gen Show s have discounted bundles that include a Blink Mini camera for only extra too Buy Echo Show nd gen at Amazon Buy Echo Show nd gen bundle at Amazon Buy Echo Show st gen bundle at Amazon Samsung Galaxy Tab S and S Both the Galaxy S and S tablets have been discounted down to and respectively Either would be good options for Android lovers looking for a new tablet ーwe were impressed by their beautiful build vibrant Hz displays long battery lives and S Pen support Buy Tab S at Amazon Buy Tab S at Amazon Jabra Elite tJabra s Elite t earbuds are on sale for which is off its normal price These earbuds impressed us with their strong ANC comfortable size and wireless charging case Buy Elite t at Amazon Fitbit Charge You can pick up the Fitbit Charge for or less than usual This is Fitbit s most comprehensive fitness band and it earned a score of from us for its full color touchscreen built in GPS onboard EDA sensors for stress tracking and multi day battery life Buy Charge at Amazon Chromecast with Google TVThe Chromecast with Google TV has dropped to which is cheaper than usual We gave the device a score of for its K HDR streaming capabilities Dolby Vision and Atmos support plus its much needed and very handy new remote Buy Chromecast with Google TV at Best Buy Roku StreambarThe Roku Streambar is down to right now or off its normal price It s a compact soundbar that will upgrade any living room relying on an old TV with weak audio We gave it a score of for its solid audio quality Dolby Audio support and built in K streaming technology Buy Roku Streambar at Amazon NVIDIA Shield TVNVIDIA s Shield TV has dropped to or cheaper than usual This is one of the more powerful streaming devices available today thanks to its Tegra X processor support for Dolby Vision HDR Dolby Atmos Chromecast K and AI powered K upscaling Buy NVIDIA Shield TV at Amazon Buy NVIDIA Shield at Best Buy Samsung T SSDThe Samsung T SSD in TB is down to a record low of which is percent off and the best price we ve seen You can also get the TB T Touch with a built in fingerprint reader for percent off or It has reads speeds up to MB s and write speeds up to MB s plus it has a shock resistant unibody and support for Dynamic Thermal Guard to control heat levels Buy Samsung T TB at Amazon Buy Samsung T Touch TB at Amazon Crucial MX internal SSDThe compact Crucial MX internal drive in TB is down to which is just a couple of dollars shy of its all time low price We like its sequential read speeds of up to MB s and sequential write speeds of up to MB s along with its standard inch design and integrated power loss immunity feature Buy Crucial MX TB at Amazon inch Vizio OLED K TVVizio s inch H OLED TV is off right now bringing it down to This is a solid price for a mid sized OLED set that supports Dolby Vision HDR Vizio s IQ Ultra processor Hz gaming with VRR and built in AirPlay and Chromecast technology Buy inch Vizio OLED at Best Buy Philips Hue White and Color smart bulbs pack A three pack of Philips Hue White and Color smart lights is on sale for or about off its normal price While not a record low it s a good sale price on smart bulbs that rarely see deep discounts These can be controlled via the Philips Hue app and almost any voice assistant including Alexa Google Assistant and Siri and they support thousands of colors as well as shares of warm and cool white light Buy Philips Hue smart lights at Amazon Buy Philips Hue smart lights at Best Buy Adobe All Apps PlanFirst time subscribers to Adobe CC can get the All Apps plan for percent off right now bringing the monthly charge down to If you re a student it s even cheaper ーjust per month for first time customers These programs are considered standard in most creative fields so it s worth grabbing this deal if you know you ll be using things like Photoshop or Illustrator in the future Subscribe to All Apps plan at Adobe monthHeadspaceThe meditation app Headspace is down to per month for new and returning customers That s percent off the normal price and those who want to pay for a year upfront will get percent off and pay only for the year Headspace has a bunch of guided meditation sessions along with sleep stories calming ambient music guided yoga sessions for stress management and more Subscribe to Headspace starting at monthGet the latest Black Friday and Cyber Monday offers by visiting our deals homepage and following EngadgetDeals on Twitter All products recommended by Engadget are selected by our editorial team independent of our parent company Some of our stories include affiliate links If you buy something through one of these links we may earn an affiliate commission	2021-11-29 11:21:24
医療系	医療介護 CBnews	看護賃上げ「対応を検討」、改定基本方針-厚労省が原案、医療部会	https://www.cbnews.jp/news/entry/20211129201831	厚生労働省	2021-11-29 20:35:00
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	2021-11-29 11:30:00
ニュース	BBC News - Home	Covid in Scotland: Six cases of Omicron variant identified	https://www.bbc.co.uk/news/uk-scotland-59457332?at_medium=RSS&at_campaign=KARANGA	virus	2021-11-29 11:31:43
ニュース	BBC News - Home	Covid: JCVI scientists to announce decision on booster rollout	https://www.bbc.co.uk/news/uk-59455914?at_medium=RSS&at_campaign=KARANGA	groups	2021-11-29 11:40:38
ニュース	BBC News - Home	Ava White: Boy, 14, in court accused of girl's murder in Liverpool	https://www.bbc.co.uk/news/uk-england-merseyside-59456938?at_medium=RSS&at_campaign=KARANGA	liverpool	2021-11-29 11:11:14
ニュース	BBC News - Home	Manchester United appoint Ralf Rangnick as interim manager	https://www.bbc.co.uk/sport/football/59439956?at_medium=RSS&at_campaign=KARANGA	Manchester United appoint Ralf Rangnick as interim managerManchester United announce the appointment of Ralf Rangnick as their interim manager until the end of the season subject to work visa requirements	2021-11-29 11:53:40
ニュース	BBC News - Home	Storm Arwen: Third night of no power for thousands	https://www.bbc.co.uk/news/uk-scotland-59457045?at_medium=RSS&at_campaign=KARANGA	aberdeenshire	2021-11-29 11:38:09
ニュース	BBC News - Home	Labour demands overhaul of system regulating ministers' conduct	https://www.bbc.co.uk/news/uk-politics-59455071?at_medium=RSS&at_campaign=KARANGA	commons	2021-11-29 11:49:17
ニュース	BBC News - Home	Storm Arwen: Trapped Tan Hill Inn guests leave	https://www.bbc.co.uk/news/uk-england-york-north-yorkshire-59459150?at_medium=RSS&at_campaign=KARANGA	manager	2021-11-29 11:52:53
ニュース	BBC News - Home	Last-wicket pair deny India as New Zealand secure thrilling draw	https://www.bbc.co.uk/sport/cricket/59460060?at_medium=RSS&at_campaign=KARANGA	india	2021-11-29 11:36:23
ニュース	BBC News - Home	Omicron: What Covid rules are being toughened in the UK?	https://www.bbc.co.uk/news/explainers-52530518?at_medium=RSS&at_campaign=KARANGA	omicron	2021-11-29 11:31:07
ニュース	BBC News - Home	Omicron: How are rules for face coverings and masks being tightened?	https://www.bbc.co.uk/news/health-51205344?at_medium=RSS&at_campaign=KARANGA	public	2021-11-29 11:42:27
LifeHuck	ライフハッカー［日本版］	Fire TV Stickが最大50％オフ！年末年始は映画とドラマを大画面で【Amazonブラックフライデー】	https://www.lifehacker.jp/2021/11/amazon-fire-tv-black-friday.html	alexa	2021-11-29 20:30:00
北海道	北海道新聞	男山が最後の「諸事情」　格安の純米大吟醸、１２月３日発売	https://www.hokkaido-np.co.jp/article/617002/	純米大吟醸	2021-11-29 20:17:29
北海道	北海道新聞	初診オンライン、恒久化へ　厚労省検討会が大筋了承	https://www.hokkaido-np.co.jp/article/617001/	厚生労働省	2021-11-29 20:11:00
IT	週刊アスキー	ニンテンドーeショップとPS Storeで「サガシリーズ ビッグセール 2021」＆「End of Yearセール」を実施！	https://weekly.ascii.jp/elem/000/004/076/4076508/	endofyear	2021-11-29 20:05:00