From: Ryan Davis <ryand-ruby@...>
Date: 2011-11-12T09:02:57+09:00
Subject: Re: The fastest way to read files


On Nov 11, 2011, at 15:20 , Robert Klemme wrote:

> On Fri, Nov 11, 2011 at 10:07 PM, Ryan Davis <ryand-ruby@zenspider.com> wrote:
>> 
>> On Nov 11, 2011, at 04:50 , Robert Klemme wrote:
>> 
>>> # ensure every word is only once in memory
>>> words = Hash.new {|h,k| k.freeze; h[k] = k}
>> 
>> AFAIK, Ruby hashes have (almost) always frozen their keys.
> 
> I know.  That's the reason why I do the freeze in the block.

I'm confused. If you know that the key is going to be frozen anyways, why freeze it?