How can I execute array of promises in sequential order?

If you already have them in an array then they are already executing. If you have a promise then it's already executing. This is not a concern of promises (I.E they are not like C# Tasks in that regard with .Start() method). .all doesn't execute anythingit just returns a promise.

If you have an array of promise returning functions:

var tasks = [fn1, fn2, fn3...];tasks.reduce(function(cur, next) {    return cur.then(next);}, RSVP.resolve()).then(function() {    //all executed});

Or values:

var idsToDelete = [1,2,3];idsToDelete.reduce(function(cur, next) {    return cur.then(function() {        return http.post("/delete.php?id=" + next);    });}, RSVP.resolve()).then(function() {    //all executed});

With ECMAScript 2017 async functions it would be done like this:

async function executeSequentially() {    const tasks = [fn1, fn2, fn3]    for (const fn of tasks) {        await fn();    }}

You can use BabelJS to use async functions now

ES7 way in 2017.

  <script>  var funcs = [    _ => new Promise(resolve => setTimeout(_ => resolve("1"), 1000)),    _ => new Promise(resolve => setTimeout(_ => resolve("2"), 1000)),    _ => new Promise(resolve => setTimeout(_ => resolve("3"), 1000)),    _ => new Promise(resolve => setTimeout(_ => resolve("4"), 1000)),    _ => new Promise(resolve => setTimeout(_ => resolve("5"), 1000)),    _ => new Promise(resolve => setTimeout(_ => resolve("6"), 1000)),    _ => new Promise(resolve => setTimeout(_ => resolve("7"), 1000))  ];  async function runPromisesInSequence(promises) {    for (let promise of promises) {      console.log(await promise());    }  }  </script>  <button onClick="runPromisesInSequence(funcs)">Do the thing</button>

This will execute the given functions sequentially(one by one), not in parallel. The parameter promises is an array of functions, which return Promise.

Plunker example with the above code: http://plnkr.co/edit/UP0rhD?p=preview