From: Bulat Ziganshin <bulatz@...>
Date: 2002-09-30T14:25:40+09:00
Subject: Re: Where Is Method Call Precedence?

Hello William,

Saturday, September 28, 2002, 7:28:03 PM, you wrote:

WDT> Hi,

WDT> If I remember correctly, tuples can be used as hash keys while an
WDT> ordinary array (or 'list' as Python calls it) cannot.  Python has the
WDT> concept of mutable and immutable objects.  Only immutable objects can be
WDT> used as hash (or 'dictionary' as Python calls it) keys.

WDT> I don't know why Python needs the concept of mutable and immutable objects

CLU roots? :)

WDT> while Ruby does not.

try:

s = "mutable"
hash = { s => "object" }
s.upcase!

-- 
Best regards,
 Bulat                            mailto:bulatz@integ.ru