lib/sugar-high/hash.rb in sugar-high-0.6.0 vs lib/sugar-high/hash.rb in sugar-high-0.6.1

@@ -1,7 +1,16 @@
 require 'sugar-high/arguments'
 
 class Hash
+
+  # http://www.dweebd.com/ruby/hash-key-rewrite/
+  def rewrite mapping
+    inject({}) do |rewritten_hash, (original_key, value)|
+      rewritten_hash[mapping.fetch(original_key, original_key)] = value
+      rewritten_hash
+    end
+  end
+  
   def hash_revert
     r = Hash.new {|h,k| h[k] = []}
     each {|k,v| r[v] << k}
     r
   end