tc39/ecma262 — pull request #13 by DmitrySoshnikov (2014-10-02 19:27:34+00:00)
Title: Map#map and Map#filter

Added proposals for:
- [Map.prototype.map](https://gist.github.com/DmitrySoshnikov/a218700746b2d7a7d2c8)
- [Map.prototype.filter](https://gist.github.com/DmitrySoshnikov/82b46f4674acee5cedc2)