JavaScript Nodejs create simple queue on Async nodejs create simple api,nodejs create simple server,node.js

UPDATE: The question is not really clear on what is given, and what is desired. From the comments, I've got the following:

three functions of check, send, and post are given and it is desired to be run in series.

Let's say that the mentioned check, send, and post all return Promises, e.g.:

function check() {
  return new Promise(function (resolve, reject) {
    // Do some stuff and save them in a var 'results'
    var results = ...;
    resolve(results);
  });
}

Then you can simply build a queue as follows:

check()
  .then(send)
  .then(post)
  .catch(function(err) { console.error(err); })

At each level the function is called with the value resolved from the previous level.

Answer:1

I think what you're looking for is async.series. Is runs an array of functions one after another in sequencial order and passes an array of results to the callbacks from the previous functions.

Example

var async = require('async');

async.series([
    function(callback) {
        //Do a bunch of relevant stuff
        callback(null, 'First function');
    },
    function(callback) {
        //Do some more relevant stuff
        callback(null, 'Second function');
    }
],
function(err, results) {
    console.log(results); //Logs ['First function', 'Second function']
});
Answer:2

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