Search code examples
applescriptosx-yosemitejavascript-automation

Using "whose" on arrays in Javascript for Automation

Playing with the new JS for automation using Script Editor. I'm getting an error on the final line of the following:

var iTunes = Application("iTunes");
var sources = iTunes.sources();
var library = sources.whose({name : "Library"});

Confirmed that the sources array is as expected (two elements, one with name "Library" and one "Internet Radio"). But that final line chokes with Error on line 3: TypeError: undefined is not a function (evaluating 'sources.whose({name : "Library"})').

As far as I can tell, I'm using the right syntax for the whose function. (I also tried with an explicit _equals clause to the same result.) What am I doing wrong?

Solution

  • This now works as theory would predict.

    (function () {
    'use strict';

    var iTunes = Application('iTunes'),
        filtered = iTunes.sources.whose({
            name: 'Library'
        });

    return filtered().length;

})();