From: Alexey Borzenkov <snaury@...>
Date: 2009-04-05T23:55:19+09:00
Subject: Re: parsing a file's contents

Ant 23 wrote:
> Hello all, I'm relatively new to ruby and this forum so I'm not sure I'm
> posting this in the right area but here goes. My problem is I have a
> file I want to read in, the file contains numbers in a CSV set-up like
> so: 2, 3, 15, 25, 29 the numbers are all written out like that 5 per
> row. What I want to do is split the numbers into columns that the 2 and
> the number under it are all in an array. The main problem I'm having is
> that when I try to put the numbers into the array I get a NoMethodError
> for the String type which I don't understand since I created the every
> method for the Array class not String. I attached the code any
> assistance is appreciated.

cols = []
row = 0
file.each_line do |line|
  line.chomp.split(/\s*,\s*/).each_with_index do |num, col|
    cols[col] ||= []
    cols[col][row] = num.to_i rescue nil
  end
  row += 1
end

Now cols[0] contains the first column, and so on.
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