From: Ralph Mason <ralph.mason@...>
Date: 2001-12-26T17:39:43+09:00
Subject: [ruby-talk:29435] Re: Help with Regular Expression

Hi Vincent,

you can just use a normal test eg

if a =~ /\d+/
        ....... A matches
else
        ...... A doesnt match
end

or perhaps an inline version

a=a.to_i if a=~/\d+/

or

a=$1.to_i if a=~/(\d+)/

This is because a regular expresion returns nil if there is no match
otherwise the offset of the match

Ralph

----- Origi/nal Message -----
From: "Vincent Foley" <gnuvince@yahoo.ca>
To: "ruby-talk ML" <ruby-talk@ruby-lang.org>
Sent: Wednesday, December 26, 2001 5:11 PM
Subject: [ruby-talk:29431] Help with Regular Expression


> Hi,
>
> I would like to know how I would check if a variable's content matches a
> regular expression.  Example (complete the code):
>
> [code]
> #!/usr/bin/env ruby
>
> a = gets.chomp
>
> # Complete here.  I want to know if a is an integer with regular
> # expressions (/\d*/).  Can I do that? How?
>
> [/code]
>
>
> --
>
> Vincent Foley-Bourgon
> Email: gnuvince@yahoo.ca
> Homepage: http://darkhost.mine.nu:81
>