Refactor Array#each

mrblib/array.rb

@@ -12,13 +12,10 @@ class Array
   def each(&block)
     return to_enum :each unless block_given?
 
-    idx, length = -1, self.length-1
-    while idx < length and length <= self.length and length = self.length-1
-      elm = self[idx += 1]
-      if elm.nil? and length >= self.length
-        break
-      end
-      block.call(elm)
+    idx = 0
+    while idx < length
+      block.call(self[idx])
+      idx += 1
     end
     self
   end