sortBy function improve

[sjpsega]

I use underscore in Adobe PhotoShop js writing;It's js environment is special,it's Array sort function is special,It may happen left and right is equal.

[braddunbar]

Hi @sjpsega! I could be wrong, but I don't think left and right can ever be === since they are created in the _.map above and will most certainly be different objects.

[sjpsega]

@braddunbar InDesign(Adobe PhotoShop is) is special.I run my example in chrome、firefox and IE6 is corrent,but in Adobe PhotoShop is incorrect.

@jdalton

[1,2].sort(function(a,b) { alert([a, b]); return 1; });
// -> alerts 2, 1
// -> alerts 1, 1 <-- issue

your example is proof in InDesign may happen left and right be equal.
but your second example is to sample.

My example is:

var testArr = [{num:991},{num:212},{num:11},{num:16},{num:74},{num:0},{num:1515}];
var result = _.sortBy(testArr,function(obj) { 
                                    return obj.num;
                                    });
//in chrome:     [{"num":0},{"num":11},{"num":16},{"num":74},{"num":212},{"num":991},{"num":1515}] (correct)
//in InDesign:   [{"num":0},{"num":212},{"num":11},{"num":16},{"num":74},{"num":991},{"num":1515}] (incorrect)

[braddunbar]

Fixed by #1253.