How do I sequentially chain promises with angularjs $q?

Question

In the promise library Q, you can do the following to sequentially chain promises:

var items = [\'one\', \'two\', \'three\'];
var chain = Q();
items         


        

Answer 1

Having this:

let items = ['one', 'two', 'three'];

One line (well, 3 for readability):

return items
    .map(item => foo.bind(null, item))
    .reduce($q.when, $q.resolve());