[ES7] Await multi promises sequentially or concurrently

Somtime 'async await' can have a bad effect on code proferemence. Let's take a look the below example:const fetch = require('node-fetch');const BASE_U
3次阅读

JavaScript Promise迷你书(中文版)--再学习

上次粗翻了一下,感觉没吃透,这次深入体会一下。 <script> function getURL(URL) { return new Promise(function(resolve, reject) { var req = ne
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同样的promise,调用方法不一样,执行顺序不一样

在测试两个不同的代码时发现的。其实也理解,一个是新建一个空的promise,另一个是新建的promise马上执行,去分支resolve状态,当然就空的在后。<script> //setImmediate(function() { // console.log(1);
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推荐一本迷你中文书《JavaScript Promise迷你书(中文版)》

https://github.com/azu/promises-bookhttp://it-ebooks24.com/ebook/mastering-javascript-promises传值,调用,错误处理,抛出,都有了哈。 function taskA(value) {
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[RxJSv& Javascript] forkJoin (reactive Promise.all) & Map

forkJoin: When all observables complete emit the last value from each.productMap: Map<number, IProduct> ngOnInit() { const cart = this.stock
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[Ramda] Convert a Promise.all Result to an Object with Ramda's zip and zipObj

In this lesson, we'll use Promise.all to get an array that contains the resolved values from multiple promises. Then we'll see how we can us
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[Ramda] Refactor a Promise Chain to Function Composition using Ramda

Promise chains can be a powerful way to handle a series of transformations to the results of an async call. In some cases, additional promises are req
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【原】手写一个promise

上一篇文章中,我们介绍了Promise的基本使用,在这篇文章中,我们试着自己来写一个Promise,主要是学习Promise的内部机制,学习它的编程思想。!!!备注:本文写的不好,仅供自己学习之用,具体的实现过程建议看下面的参考文章。所以本文没有发布到博客园首页和其他地方 Promise
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【原】谈谈promise

    最近在看《你不知道的javascript中卷》,发觉作者花了基本一半的篇幅去讲异步和promise,觉得有必要总结一下。 其实本文的目的是想手写一个Promise的,无奈总结着总结着发觉篇幅有点长,因此只好一分为二,先介绍promise的用法,知道怎么用,我们才知道怎么写
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Promise.race

【Promise.race】  返回最先完成的promisevar p1 = new Promise(function(resolve, reject) { setTimeout(resolve, 500, "one"); });var p2 = new Promise(function(r
8次阅读