From: Brian Candler <B.Candler@...>
Date: 2003-04-24T17:55:38+09:00
Subject: Re: parsing large file into matrix

On Thu, Apr 24, 2003 at 02:26:08PM +0900, Qubert wrote:
> Is there a Ruby-way of creating an m by n array from the beginning?
> I know the following doesn't work but something like it code would be nice:
> x = File.open("file.txt").readlines.split('\t')

x = File.open("file.txt").readlines.collect! do |line|
        line.chomp.split("\t")
    end

Although that leaves the file open until garbage collection time. The
following does not have that problem; it also processes the lines as they
are read.

x = File.open("file.txt") do |f|
  f.collect do |line|
    line.chomp.split("\t")
  end
end

Regards,

Brian.