Make Javascript do List Comprehension

Question

What is the cleanest way to make Javascript do something like Python\'s list comprehension?

In Python if I have a list of objects whose name\'s I want to \'

Answer 1

This is an example of a place where Coffeescript really shines

pows = [x**2 for x in foo_arr]
list_of_names = [x.name for x in list_of_objects]

The equivalent Javascript would be:

var list_of_names, pows, x;

pows = [
  (function() {
    var _i, _len, _results;
    _results = [];
    for (_i = 0, _len = foo_arr.length; _i < _len; _i++) {
      x = foo_arr[_i];
      _results.push(Math.pow(x, 2));
    }
    return _results;
  })()
];

list_of_names = [
  (function() {
    var _i, _len, _results;
    _results = [];
    for (_i = 0, _len = list_of_objects.length; _i < _len; _i++) {
      x = list_of_objects[_i];
      _results.push(x.name);
    }
    return _results;
  })()
];