From: ts <decoux@...>
Date: 2004-12-14T02:51:52+09:00
Subject: Re: Hash freezes String keys are returns copy

>>>>> "M" == Michael Neumann <mneumann@ntecs.de> writes:

M> okay... but isn't it the same when using a String?

 this is made volontary for efficienty : otherwise each time that you
 modify an object, used as a key, ruby will need to re-hash the hash if you
 don't want to have strange result like the example that I've given

 In reality when you write

   a = "test"
   hash[a] = "test"

 the key and `a' share the same string, but `a' is marked copy-on-write

M> they behave differently.

 Search the archive of [ruby-talk] for this :-)


Guy Decoux