ES6 Promises - 类似于 async.each? [英] ES6 Promises - something like async.each?

问题描述

试图弄清楚如何找到功能与 async.eachSeries 完全一样的东西，我需要一个按顺序(不是并行)运行的异步操作列表，但找不到在原生 ES6 中执行此操作的方法，可以有没有人指教一下?

Trying to figure-out how to find something that functional exactly like async.eachSeries, i need a list of async actions run in sequence (not in parallel) but can't find a way to do it in native ES6, can anyone advise, please?

附言考虑过发电机/产量，但还没有经验，所以我没有意识到它到底能帮我什么.

p.s. thought about generators/yield but don't have the experience yet so I'm not realized how exactly it can help me.

编辑 1

每个请求，这里是一个例子:

per request, here is an example:

假设代码如下:

let model1 = new MongooseModel({prop1: "a", prop2: "b"});
let model2 = new MongooseModel({prop1: "c", prop2: "d"});

let arr = [model1 , model2];

现在，我想连续运行它，而不是并行运行，所以使用异步"NPM 很容易:

Now, I want to run over it in a series, not parallel, so with the "async" NPM it's easy:

async.eachSeries(arr, (model, next)=>{
    model.save.then(next).catch(next);
}, err=>{
    if(err) return reject(error);
    resolve();
})

我的问题是:使用 ES6，我可以在本地实现吗?没有 NPM 'async' 包?

My question is: with ES6, can I do it natively? without the NPM 'async' package?

编辑 2

使用 async/await 可以轻松完成:

With async/await it can be done easily:

let model1 = new MongooseModel({prop1: "a", prop2: "b"});
let model2 = new MongooseModel({prop1: "c", prop2: "d"});    

let arr = [model1 , model2];

for(let model of arr){
    await model.save();
}

推荐答案

对于喜欢简短回答的人:

For those who like short answers:

[func1, func2].reduce((p, f) => p.then(f), Promise.resolve());

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