From: Brian Candler <B.Candler@...>
Date: 2004-10-10T00:50:10+09:00
Subject: Re: split file into 2D array

On Sun, Oct 10, 2004 at 12:44:50AM +0900, Arthur Korneyew wrote:
> I just tried:
> 
> a = [[],[]]
> IO.foreach("words.txt") {|line|
>   unless line.strip.empty? | (line =~ (/^\#/))
>   string = line.chomp.split
>   a << string
>  end
> }
> 
> #puts a
> puts [0][1]
> 
> [root@tequila2 logs]# ./logs5.rb 
> nil
> 
> If I tried to print second element from array (it should be word2),I 
> have got nil.

Useful debug tool: put at the end

  puts a.inspect
or
  p a

and you'll see what's wrong. It's find except you put an initial empty row
in there. Either change the first line to

  a = []     # array with no elements

or else do puts a[1][0], a[1][1] to get the first useful element.

Regards,

Brian.