From: Denis Hennessy <denis@...>
Date: 2008-01-04T21:36:27+09:00
Subject: Re: random i/o disk file

It works just like in C....

$ echo thisisatest > test.fil
$ irb
 >> f = File.open('test.fil')
=> #<File:test.fil>
 >> f.seek(3, IO::SEEK_SET)
=> 0
 >> f.read 3
=> "sis"

/dh

On 4 Jan 2008, at 12:14, Tom Cloyd wrote:

> Am definitely on the steep part of the ruby learning curve. I've  
> programmed a bit in several other languages. Now I need something  
> like a random disk file, so I can have a large hash or something  
> like it available for random access. I've looked in Programming Ruby  
> II, and the Ruby Cookbook. No info there. I then tried to search the  
> arhives at http://blade.nagaokaut.ac.jp/ruby/ruby-talk/index.shtml -  
> the search tool seems not to be working. I then tried to find  
> something with Google. No go.
>
> I must be thinking about this wrongly, somehow.
>
> So...how does one handle indexed (random) access to a large file -  
> one too large to have in memory? I can't believe that random/like  
> disk I/O is not possible in ruby.
>
> Thanks in advance...
>
> t.
>
> -- 
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Tom Cloyd, MS MA, LMHC
> Private practice Psychotherapist
> Bellingham, Washington, U.S.A: (360) 920-1226
> << tc@tomcloyd.com >> (email)
> << TomCloyd.com >> (website & psychotherapy weblog) <<  
> sleightmind.wordpress.com >> (mental health issues weblog)
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
>