require 'facets/array/recursively'
Apply a method to array, and recursively apply that method to each sub-array or given +types+.
By default the sub-types are passed through unaffected. Passing a block to #recursively can be used to change this.
each
r = []
[1,2,['a','b'], 3].recursively.each{|v| r << v}
r.assert = [1,2,'a','b', 3]
map
arr = ['foo','bar',['a','b']]
arr.recursively.map{|v| v.to_sym}.assert == [:foo,:bar,[:a,:b]]