elixir-lang/elixir — pull request #230 by alco (2012-04-04 10:12:23+00:00)
Title: New functions for the System module

Not sure how to deal with the "binary vs charlist" issue. I tried to reach a balance with adding binary support for some functions. `put_env` would require 4 clauses to accept all pairs "binary-list", "list-binary", "binary-binary", and "list-list", so I didn't do it for this function.