JavaScript中的observable和promise之间有什么区别？ [英] What are the differences between observables and promises in JavaScript?
问题描述
所以我已经读过，在一些即将推出的JavaScript MVC中，observables正在寻求超越承诺：
So i've read that observables are looking to overtake promises in terms of usage in some of upcoming JavaScript MVC's:
- Angular 2.0
- Falcor used by Netflix
observables和promises有什么区别？
What is the difference between observables and promises?
更新：道歉！删除了我的虚假陈述。
Updated: Apologies! removed my falsy statement.
推荐答案
observables和promises有什么区别？
What is the difference between observables and promises?
简单地说：一个promise以异步方式解析为单个值，一个observable解析为（或发出）多个值异步（随着时间的推移）。
Simply put: A promise resolves to a single value asynchronously, an observable resolves to (or emits) multiple values asynchronously (over time).
具体示例：
- 承诺：来自Ajax调用的响应
- 可观察：点击事件
更多信息可以是在此处找到： http://reactivex.io/intro.html
More information can be found here: http://reactivex.io/intro.html
我读过observables希望超越承诺
i've read that observables are looking to overtake promises
不太可能。对于某些问题，Observable可能是更好的解决方案，但这并不能使承诺过时（如果这就是你的意思）。
Unlikely. Observables might be the better solution to certain problems, but that doesn't make promises obsolete (if that's what you mean).
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