borisyankov/DefinitelyTyped — pull request #226 by Steve-Fenton (2013-01-29 17:21:07+00:00)
Title: Update underscore/underscore.d.ts

The List interface prevents normal use of underscore, i.e.

_.countBy([1, 2, 3], function (item) {
return item % 2;
});

Using the any[] type allows this usage.