nbomberger · February 13, 2014 22:40
diff --git a/hash_extend.rb b/hash_extend.rb
 class Hash
  def except(*blacklist)
    {}.tap do |h|
      (keys - blacklist).each { |k| h[k] = self[k] }
    end
  end

  def only(*whitelist)
    {}.tap do |h|
      (keys & whitelist).each { |k| h[k] = self[k] }
    end
  end
 end
	class Hash
	def except(*blacklist)
	{}.tap do \|h\|
	(keys - blacklist).each { \|k\| h[k] = self[k] }
	end
	end

	def only(*whitelist)
	{}.tap do \|h\|
	(keys & whitelist).each { \|k\| h[k] = self[k] }
	end
	end
	end