lib/crosscounter/util.rb in crosscounter-0.2.0 vs lib/crosscounter/util.rb in crosscounter-0.3.0

@@ -1,11 +1,23 @@
 module Crosscounter
   module Util
+    @@tuples  = {}
+
     def self.stringify_keys(hash)
       hash.keys.each do |key|
         hash[key.to_s] = hash.delete(key)
       end
 
       hash
+    end
+
+    def self.stringify_all(array)
+      array.map { |object| Crosscounter::Util.stringify_keys(object) }
+    end
+
+    def self.tuplize(hash)
+      @@tuples[hash] ||= hash.flat_map do |tuple|
+        tuple.last.map { |value| [tuple.first.to_s, value] }
+      end
     end
   end
 end