From: Gianfranco Bozzetti <gf.bozzetti@...>
Date: 2010-10-08T17:36:55+09:00
Subject: Re: regexp issue

Idealone Ideally wrote:
> Hi All,
>         I have an issue in parsing regular expression and im new to
> regexp.
>  Varaiable = "Internation tip ($25 fee)"
> The $25 might vary each time, it might be $5, $ 10 so on
> 
> I tried doing something like this which didnt work, kindly help
> variable = "Internation tip (regexp:$[0-9][0-9]+ fee)"
> i want the regular expression to aid both single digit or multi digit
> currency.
> 
> Cheers

As Stefano Crocco pointed out $,(,) must be escaped.
To allow any number of digits, and at least 1 use \d{1,).
Moreover you must match different descriptions and check for null 
values.
Example:

var =["Internation tip1  ($9 fee)","Internation tip2  ($25 fee)",
      "Internation tip3  ($350 fee)","Internation tip3  ($5000 fee)",
      "Internation tip5"]

rx =/.+(\(\$*\d{1,}\s+fee\)).*/i

fmt= "%-30s %6s\n"
var.each do |str|
    if( m=rx.match(str) )
        printf fmt , str, m[1] # m[1]=first sub-expression
        else printf fmt, str,'Null Value'
    end #if
end #do

HTH gfb
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