rails/rails — pull request #6824 by afeld (2012-06-22 06:21:07+00:00)
Title: alias Hash#slice as #extract

I find myself looking at the ActiveSupport [Hash#extract! documentation](http://api.rubyonrails.org/classes/Hash.html#method-i-extract-21) over and over, wishing it didn't modify the original hash. Of course, I simply forget that [#slice](http://api.rubyonrails.org/classes/Hash.html#method-i-slice) is available, but I figure I'm not the only one missing this.