From: "Sandor Szücs" <sandor.szuecs@...>
Date: 2008-07-15T18:50:17+09:00
Subject: Re: the Regular exp read from file not matching !!

On 15.07.2008, at 05:07, Jay Jkb wrote:

> some explanation on why? , would be great .

In my opinion it's a String vs. RegExp problem.

Your rdebug output said that your syntax variable was a String, or?:
> (rdb:1) v l
>   filename => "C:\\rubypgm\\Paramsyntax\\prm.102"
>   newsettings => "1abcd"
>   param => "102"
>   syntax => "/^[0-1]{1}[a-zA-Z]{1,25}$/"

syntax has doublequotes and is a String here (maybe a hint or just  
output?).

However if you read from file you get a String not an Regexp you want to
have a new Regexp  so you have to use Regexp.new or /"string"/.

In a test the String don't match like a Regexp:

irb> syntax="/^[0-1]{1}[a-zA-Z]{1,25}$/"
irb> newsettings="1abcd"
irb> syntax.match(newsettings)	=> nil
irb> syntax2=/^[0-1]{1}[a-zA-Z]{1,25}$/
irb> syntax2.match(newsettings)	=> #<MatchData "1abcd">

you want:
irb> Regexp.new("/^[0-1]{1}[a-zA-Z]{1,25}$/") => /\/^[0-1]{1}[a-zA-Z] 
{1,25}$\//

or what you did:
> /#{syntaxfile.gets.chomp}/.match(@newsettings.value)


It's a Regexp so it works as expected.

hth. regards, Sandor Szücs
--
P.S. sorry for my missinterpretation of your problem on my first answer.