From: Simon Strandgaard <neoneye@...>
Date: 2004-04-15T23:34:10+09:00
Subject: Re: Hash == not always working? Or am I missing something?

On Fri, 16 Apr 2004 00:07:55 +0900, walte wrote:
> I am having difficulty with Hash and sometimes Arrays with ==.  Below 
> is an example with Hashes.  I am trying to do some simple cleanup of 
> our data and was trying TDD some code but I do not understand why it 
> says my 2 Hashes are different.  They appear identical but show up as 
> false using ==.
> 

I see you make usage of #default_proc.. but the Hash you
compare against does't contains a equal #default_proc.


server> ri Hash.default_proc
------------------------------------------------------ Hash#default_proc
     hsh.default_proc -> anObject
------------------------------------------------------------------------
     If +Hash::new+ was invoked with a block, return that block,
     otherwise return +nil+.

        h = Hash.new {|h,k| h[k] = k*k }   #=> {}
        p = h.default_proc                 #=> #<Proc:0x401b3d08@-:1>
        a = []                             #=> []
        p.call(a, 2)
        a                                  #=> [nil, nil, 4]

server>

--
Simon Strandgaard