From: "David A. Black" <dblack@...>
Date: 2008-06-12T20:29:38+09:00
Subject: Re: Newby Ruby Regular Expression Question

Hi --

On Thu, 12 Jun 2008, Ruchira Bomiriya wrote:

> Dear Expert,
>
> I have recently started Ruby programming.  I have used Perl before and
> liked it mostly due to the power of regular expressions.  But Ruby's
> ability scale and modularize is absolutely amazing.
>
> I want to find FOUR instances of A in the string "AaAbAcAd" using
> regular expressions.
>
> I tried
>
> str = "AaAbAcAd"
> md = str.match(/(A)/)
>
> and get just one instance (seems like the last 'A')
>
> The perl equivalent of what I really want is
>
> $str = "AaAbAcAd"
> @md = ($str =~ /A/g)
>
> So what I really want to find out is if there is something equivalent
> to the Perl g option available in Ruby.  How would you get all FOUR
> matches in a reasonable way?

str.scan(/A/). I can't help wondering though... what made you think
that the A you got is the last A? (It's actually the first A.)


David

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