Merge branch 'master' into tr/tutorial

Author: koba04

content/blog/2019-02-23-is-react-translated-yet.md

@@ -13,19 +13,19 @@ In addition, the following three languages have completed translating most of th
 
 Special congratulations to [Alejandro Ñáñez Ortiz](https://github.com/alejandronanez), [Rainer Martínez Fraga](https://github.com/carburo), [David Morales](https://github.com/dmorales), [Miguel Alejandro Bolivar Portilla](https://github.com/Darking360), and all the contributors to the Spanish translation for being the first to *completely* translate the core pages of the docs!
 
-## Why Localization Matters
+## Why Localization Matters {#why-localization-matters}
 
 React already has many meetups and conferences around the world, but many programmers don't use English as their primary language. We’d love to support local communities who use React by making our documentation available in most popular languages.
 
 In the past, React community members have created unofficial translations for [Chinese](https://github.com/discountry/react), [Arabic](https://wiki.hsoub.com/React), and [Korean](https://github.com/reactjs/ko.reactjs.org/issues/4); by making an official channel for these translated docs we're hoping to make them easier to find and help make sure that non-English-speaking users of React aren't left behind.
 
-## Contributing
+## Contributing {#contributing}
 
 If you would like to help out on a current translation, check out the [Languages](/languages) page and click on the "Contribute" link for your language.
 
 Can't find your language? If you'd like to maintain your langauge's translation fork, follow the instructions in the [translation repo](https://github.com/reactjs/reactjs.org-translation#starting-a-new-translation)!
 
-## Backstory
+## Backstory {#backstory}
 
 Hi everyone! I'm [Nat](https://twitter.com/tesseralis)! You may know me as the [polyhedra lady](https://www.youtube.com/watch?v=Ew-UzGC8RqQ). For the past few weeks, I've been helping the React team coordinate their translation effort. Here's how I did it.
 
@@ -45,7 +45,7 @@ After the trial period, we were ready to accept more languages. I created [a scr
 
 Because of the automation, the rest of the maintance went mostly smoothly. We eventually created a [Slack channel](https://rt-slack-invite.herokuapp.com) to make it easier for translators to share information, and I released a guide solidifying the [responsibilities of maintainers](https://github.com/reactjs/reactjs.org-translation/blob/master/maintainer-guide.md). Allowing translators to talk with each other was a great boon -- for example, the Arabic, Persian, and Hebrew translations were able to talk to each other in order to get [right-to-left text](https://en.wikipedia.org/wiki/Right-to-left) working!
 
-## The Bot
+## The Bot {#the-bot}
 
 The most challenging part was getting the bot to sync changes from the English version of the site. Initially we were using the [che-tsumi](https://github.com/vuejs-jp/che-tsumi) bot created by the Japanese Vue translation team, but we soon decided to build our own bot to suit our needs. In particular, the che-tsumi bot works by [cherry picking](https://git-scm.com/docs/git-cherry-pick) new commits. This ended up causing a cavalade of new issues that were interconnected, especially when [Hooks were released](/blog/2019/02/06/react-v16.8.0.html).
 
@@ -63,7 +63,7 @@ There were other smaller issues that I ran into. I tried using the [Heroku Sched
 
 There are, as always, improvements I want to make to the bot. Right now it doesn't check whether there is an outstanding pull request before pushing another one. It's still hard to tell the exact change that happened in the original source, and it's possible to miss out on a needed translation change. But I trust the maintainers we've chosen to work through these issues, and the bot is [open source](https://github.com/reactjs/reactjs.org-translation) if anyone wants to help me make these improvements!
 
-## Thanks
+## Thanks {#thanks}
 
 Finally, I would like to extend my gratitude to the following people and groups:
 

content/community/conferences.md

@@ -51,6 +51,11 @@ June 21, 2019 Chicago, Illinois USA
 
 [Website](https://reactloop.com) - [Twitter](https://twitter.com/ReactLoop)
 
+### React Week '19 {#RWNY19}
+July 15-21, 2019. New York City, USA
+
+[Website](https://reactweek.nyc) - [Twitter](https://twitter.com/ReactWeek)
+
 ### ComponentsConf 2019 {#componentsconf-2019}
 September 6, 2019 in Melbourne, Australia
 [Website](https://www.componentsconf.com.au/) - [Twitter](https://twitter.com/componentsconf)

content/community/examples.md

@@ -11,10 +11,10 @@ There are many example projects created by the React community. Feel free to add
 
 * **[Calculator](https://github.com/ahfarmer/calculator)** Implementation of the iOS calculator built in React
 * **[Emoji Search](https://github.com/ahfarmer/emoji-search)** Simple React app for searching emoji
-* **[Github Battle App](https://github.com/ReactTraining/react-fundamentals/tree/hosting)** Battle two Github users and see the most popular Github projects for any language.
+* **[Github Battle App](https://tm.dev/react-course-project/)** Battle two Github users and see the most popular Github projects for any language.
 * **[React Powered Hacker News Client](https://github.com/insin/react-hn)** A React & react-router-powered implementation of Hacker News using its Firebase API.
 * **[Pokedex](https://github.com/alik0211/pokedex)** The list of Pokémon with live search
-* **[Shopping Cart](https://github.com/jeffersonRibeiro/react-shopping-cart)** Simple ecommerce cart application built using React 
+* **[Shopping Cart](https://github.com/jeffersonRibeiro/react-shopping-cart)** Simple ecommerce cart application built using React
 * **[Progressive Web Tetris](https://github.com/skidding/flatris)** Besides a beautiful, mobile-friendly implementation of Tetris, this project is a playground for integrating and experimenting with web technologies.
 * **[Product Comparison Page](https://github.com/Rhymond/product-compare-react)** Simple Product Compare page built in React
 * **[Hacker News Clone React/GraphQL](https://github.com/clintonwoo/hackernews-react-graphql)** Hacker News clone rewritten with universal JavaScript, using React and GraphQL.

content/docs/hooks-intro.md

@@ -71,7 +71,7 @@ React は再利用可能な振る舞いをコンポーネントに「付加す
 
 我々はよく、最初はシンプルだったのに、state を使うロジックや副作用によって管理不能なごちゃ混ぜ状態に陥ってしまったコンポーネントをメンテナンスさせられてきました。それぞれのライフサイクルメソッドには、しばしば互いに関係のないロジックが混在してしまいます。例えばとあるコンポーネントは `componentDidMount` と `componentDidUpdae` で何かデータを取得しているかもしれません。しかし同じ `componentDidMount` 内には、イベントリスナーを登録する何か無関係なロジックがあるかもしれませんし、そのクリーンアップのコードは `componentWillUnmount` に書かれているかもしれません、といった具合です。一緒に更新されるべき互いに関連したコードがバラバラにされ、一方でまったく無関係なコードが 1 つのメソッド内に書かれています。このような状態は簡単にバグや非整合性を引き起こします。
 
-多くの場合、ステートを使ったロジックはコンポーネント内のあらゆる場所にあるため、小さなコンポーネントに分割することは不可能です。テストも困難になります。これが、多くの人が単体の状態管理ライブラリの利用を好む理由のひとつでもあります。しかし、そのようなライブラリの利用を利用するとしばしば過剰な抽象化を引き起こしたり、様々なファイルにジャンプさせられたり、コンポーネントの再利用がより困難になってしまったりします。
+多くの場合、ステートを使ったロジックはコンポーネント内のあらゆる場所にあるため、小さなコンポーネントに分割することは不可能です。テストも困難になります。これが、多くの人が単体の状態管理ライブラリの利用を好む理由のひとつでもあります。しかし、そのようなライブラリを利用するとしばしば過剰な抽象化を引き起こしたり、様々なファイルにジャンプさせられたり、コンポーネントの再利用がより困難になってしまったりします。
 
 この問題を解決するため、関連する機能（例えばデータの購読や取得）をライフサイクルメソッドによって無理矢理分割する代わりに、**フックは関連する機能に基づいて、1 つのコンポーネントを複数の小さな関数に分割することを可能にします。**より state 管理を予測しやすくするため、必要に応じてリデューサ (reducer) を使って管理するようにしてもよいでしょう。