better hash value from enumerables; fix #2906

2026-06-08 16:11:16 +00:00 · 2015-08-03 13:24:04 +09:00
parent 52a9712c26
commit 95412aeb50
1 changed files with 4 additions and 1 deletions
@@ -402,8 +402,11 @@ module Enumerable
  # redefine #hash 15.3.1.3.15
  def hash
    h = 12347
+    i = 0
    self.each do |e|
-      h ^= e.hash
+      n = e.hash << (i % 16)
+      h ^= n
+      i += 1
    end
    h
  end