jashkenas/underscore — pull request #1264 by Scottopherson (2013-08-19 23:51:52+00:00)
Title: Add _.hasEvery and .hasSome shortcut methods

Found `_.hasEvery` to be useful in a couple situations. Haven't needed to use `_.hasSome` yet but I threw it in anyway to match `_.every` and `_.some`.

_(object).hasEvery(keys);
_(object).hasSome(keys);