jashkenas/underscore — pull request #1741 by megawac (2014-07-13 00:40:22+00:00)
Title: Simplify _.uniq

Avoiding `lookupIterator` for `undefined` and `null` doesn't help perf. This also makes `false` and `""` route to `_.property` as elsewhere in the library

http://jsperf.com/underscore-escape/5