On Tue, May 15, 2012 at 5:03 PM, Neubyr Neubyr <[email protected]> wrote:
> I am using OptionParser to parse command-line options. I would like to
> run a program in following manner:
>
> $ multiply-by.rb --factor 3 4
> $ 12
>
> where last number '4' is an input argument which should not need any
> option flag/switch. Any hints on how can it be done? Is it possible with
> OptionParser or should I write my own option parser method?
This is how I'd do it:
require 'optparse'
factor = nil
OptionParser.new do |opts|
opts.on '-f', '--factor=F', Integer, 'Multiplication factor' do |v|
factor = v
end
end.parse! ARGV
abort "ERROR: need a factor" unless factor
ARGV.each {|v| puts(Integer(v) * factor)}
Kind regards
robert
--
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