[#35446] [Ruby 1.9 - Bug #4477][Open] Kernel:exec and backtick (`) don't work for certain system commands — Joachim Wuttke <j.wuttke@...>

10 messages 2011/03/07

[#35476] [Ruby 1.9 - Bug #4489][Open] [PATCH] Encodings with /-(unix|dos|mac)\Z/ — "James M. Lawrence" <quixoticsycophant@...>

20 messages 2011/03/10

[#35552] [Ruby 1.9 - Feature #4523][Open] Kernel#require to return the path of the loaded file — Alex Young <alex@...>

14 messages 2011/03/24

[#35565] [Ruby 1.9 - Feature #4531][Open] [PATCH 0/7] use poll() instead of select() in certain cases — Eric Wong <normalperson@...>

33 messages 2011/03/28

[#35566] [Ruby 1.9 - Feature #4532][Open] [PATCH] add IO#pread and IO#pwrite methods — Eric Wong <normalperson@...>

12 messages 2011/03/28

[#35586] [Ruby 1.9 - Feature #4538][Open] [PATCH (cleanup)] avoid unnecessary select() calls before doing I/O — Eric Wong <normalperson@...>

9 messages 2011/03/29

[ruby-core:35408] Re: Why are hash keys sometimes duped?

From: Yukihiro Matsumoto <matz@...>
Date: 2011-03-02 00:04:44 UTC
List: ruby-core #35408
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

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