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RxJS v4.0 Reactive Extensions (Rx) is a library for composing asynchronous and event-based programs using observable sequences and LINQ-style query operators. Data sequences can take many forms, such as a stream of data from a file or web service, web services requests, system notifications, or a series of events such as user input. Reactive Extensions represents all these data sequences as observ
この記事は bouzuya's RxJS Advent Calendar 2015 23 日目かつ RxJS Advent Calendar 2015 の 23 日目です。 はじめに 今日は Promise と Obervable とを相互変換する方法について書きます。 Observable と Promise Promise は ES2015 で標準化され、各種 Web browser で実装されて、 JavaScript の非同期処理の代表的なものになっています。 RxJS の Observable は Promise からの変換や Promise への変換に対応しています。 Promise の扱いについて見ていきます。 Promise to Observable Observable.fromPromise Observable.fromPromise API Document Ob
Promise Cancellation Is Dead — Long Live Promise Cancellation! Not very long ago Domenic Denicola (worth a follow, a very smart guy) withdrew his proposal for promise cancellation from the TC39. A lot of people might think that means that promise cancellation isn’t coming to JavaScript. Those people would be right, if you couldn’t already cancel a promise via very similar means to what was propose
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