From: Robert Klemme <shortcutter@...>
Date: 2008-02-20T22:15:12+09:00
Subject: Re: Is there a clash between gets and ARGV?

2008/2/20, Sebastian Hungerecker <sepp2k@googlemail.com>:
> ycsunil wrote:
>  > C:\Documents and Settings\sunilc\Desktop>ruby test.rb 'add'
>  > input something
>  > test.rb:3:in `gets': No such file or directory - add (Errno::ENOENT)
>  >         from test.rb:3
>  >
>  > Please let me know why is this error coming?
>
>
> Kernel#gets tries to read from the file specified by the command line
>  arguments if there are any. This is documented (and in some cases useful).
>  If you don't want this behaviour use IO#gets directly (as in: STDIN.gets).

Alternatively the script can be fixed like this:

if (ARGV.shift == 'add')
  puts 'input something'
  gt = gets
  puts gt
else
  puts 'fail'
end

A more complex but also more robust alternative might be to process
command line options e.g. with OptionParser.

Kind regards

robert

-- 
use.inject do |as, often| as.you_can - without end