From: Yukihiro Matsumoto Date: 2006-09-21T10:16:29+09:00 Subject: Re: Bug in Hash#hash? (Ruby 1.8.4) Hi, In message "Re: Bug in Hash#hash? (Ruby 1.8.4)" on Thu, 21 Sep 2006 09:34:17 +0900, "Rick DeNatale" writes: |Smalltalkers might recall that Smalltalk has both a Hash which uses |Smalltalks equivalents to Ruby's hash and ==, and IdentityHash which |uses Smalltalks equivalents to Ruby's object_id for the hash, and |equal? Recently, 1.9 added Hash#compare_by_identity method which makes Hash to compare its keys by identity. matz.