From: Eric Hodel <drbrain@...7.net>
Date: 2007-08-12T08:53:27+09:00
Subject: Re: Sorting a logfile, how would you write it?

On Aug 11, 2007, at 15:25, William James wrote:
> On Aug 10, 11:19 pm, Ryan Davis <ryand-r...@zenspider.com> wrote:
>> On Aug 10, 2007, at 13:54 , William James wrote:
>>> File.open( ARGV.first, "r+" ){|file|
>>>   array = file.readlines
>>>   file.rewind
>>>   file.truncate(0)
>>>   file.puts array.sort_by{|s| s[/^\d+/].to_i }
>>> }
>>
>> your version takes a lot of memory,
>
> Wrong.

This method uses at least 2x the file size worth of memory.  That's a  
lot.

> E:\Ruby>ruby -e 'path = ARGV.shift; system %(sort -n "#{path}"
>> "#{path}.tmp"); File.rename "#{path}.tmp", path' data
> -e:1: unterminated string meets end of file

I just ran it, it worked fine.

You'll probably have to redo the quoting for a non-bourne-compatible  
shell.

> Perhaps your attempt at a solution requires Unix, and you,
> in your ignorance, or your thoughtlessness, or your
> ignorance and your thoughtlessness, assumed that every
> user of Ruby is a user of Unix.

Please try to flame harder.  This one just made me chuckle.

--
Poor workers blame their tools. Good workers build better tools. The
best workers get their tools to do the work for them. -- Syndicate Wars