lib/ext/array.rb in fathom-0.3.7 vs lib/ext/array.rb in fathom-0.5.0

@@ -1,5 +1,9 @@
 class Array
-  def rand
-    self[Kernel.rand(self.length)]
+  def invert(&block)
+    h = {}
+    self.each_with_index do |x, i|
+      h[x] = block ? yield(x, i) : i
+    end
+    h
   end
 end