问题描述
在异步的NodeJS模块：提供了2个类似的方法， async.waterfall 和 async.series 。
The nodejs async module: https://github.com/caolan/async provides 2 similar methods, async.waterfall and async.series.
它们之间有什么区别呢？
What is the difference between them?
推荐答案
看来， async.waterfall 允许每个功能传递到下一个功能它的结果，而 async.series 通过所有结果到最后的回调。在一个较高的水平， async.waterfall 将是一个数据管道（给出2，乘以3是由17加2，和鸿沟），而 async.series 将是必须的顺序进行离散任务，但在其他方面是分开的。
It appears that async.waterfall allows each function to pass its results on to the next function, while async.series passes all results to the final callback. At a higher level, async.waterfall would be for a data pipeline ("given 2, multiply it by 3, add 2, and divide by 17"), while async.series would be for discrete tasks that must be performed in order, but are otherwise separate.
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