string.rb in ethon-0.3.0

- old
+ new
@@ -3,14 +3,36 @@
   # This module contains all core extensions ethon
   # needs.
   module Extensions
     module String # :nodoc:
 
-      # Return part of the string.
+      unless ''.respond_to?(:byteslice)
+        # Return part of the string.
+        #
+        # @return [ String ] Part of the string.
+        def byteslice(*args)
+          self[*args]
+        end
+      end
+
+      # Convert string to underscore. Taken from
+      # activesupport, renamed in order to no collide
+      # with it.
       #
-      # @return [ String ] Part of the string.
-      def byteslice(*args)
-        self[*args]
+      # @example Underscore.
+      #   "ClassName".underscr
+      #   #=> "class_name"
+      #
+      # @return [ String ] Underscore string.
+      def underscr
+        word = self.dup
+        word.gsub!('::', '_')
+        word.gsub!(/(?:([A-Za-z\d])|^)(#{/(?=a)b/})(?=\b|[^a-z])/) { "#{$1}#{$1 && '_'}#{$2.downcase}" }
+        word.gsub!(/([A-Z\d]+)([A-Z][a-z])/,'\1_\2')
+        word.gsub!(/([a-z\d])([A-Z])/,'\1_\2')
+        word.tr!("-", "_")
+        word.downcase!
+        word
       end
     end
   end
 end
 