From: Yukihiro Matsumoto <matz@...>
Date: 2011-03-02T09:04:44+09:00
Subject: [ruby-core:35408] Re: Why are hash keys sometimes duped?

Hi,

Eric, your guess is correct.  It's a compromise between mutable
strings and rehashing.

							matz.

In message "Re: [ruby-core:35407] Re: Why are hash keys sometimes duped?"
    on Wed, 2 Mar 2011 08:29:59 +0900, Eric Wong <normalperson@yhbt.net> writes:
|
|Aaron Patterson <aaron@tenderlovemaking.com> wrote:
|> Why are some objects duped when they are used as hash keys and other
|> objects are not?
|
|I've always wondered this, too, or rather why strings are duped + frozen
|while Arrays and other objects are not.  I speculate that strings are
|just commonly used as keys and also often modified and it allows users
|to avoid needing to rehash.
|
|I'd definitely like to see Matz's response to this.
|
|-- 
|Eric Wong