From: Matthew Feadler <matthew@...>
Date: 2005-12-23T03:47:04+09:00
Subject: Re: String > Integer Conversion Problem

First, thanks all very much for the lively discussion thus far.  It's 
proven very useful.

Timothy Hunter wrote:
> The Integer() method raises ArgumentError if given an empty,
> non-numeric, or otherwise non-well-formed string.

Hmm...apparently not--at least not w/ 1.8.2 on mswin32.

This:

  begin
    one, two = ARGV.map{ |n| Integer(n) }
  rescue ArgumentError
    puts "Usage..."
    exit
  end

  puts one
  puts two

Outputs:

  nil
  nil

When fed no command-line arguments.  It does work as intended if any of 
the args are non-empty strings, however.

Also:

  raise "Hey, '#{ arg }' needs to be a number" if !arg.match(/^\d*$/)

I'm a regexp neophyte, without skill or clue.  Any suggestions on 
tutorials?

Thanks,

-Matthew

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