Hello,
I want to replace:
id="idxxxxxxx" with id="id20"
in a string
I know this can be done with gsub but I don't know how to use wildcards.
The xxxxxxx can be of any length but only numbers
Thx
This should do - string.gsub(/\d+/, '20')
···
On Thu, Jun 3, 2010 at 15:40, Reinhart Viane <rv@domos.be> wrote:
Hello,
I want to replace:
id="idxxxxxxx" with id="id20"
in a string
I know this can be done with gsub but I don't know how to use wildcards.
The xxxxxxx can be of any length but only numbers
Thx
--
Thanks & Regards,
Dhruva Sagar.
Hi --
Hello,
I want to replace:
id="idxxxxxxx" with id="id20"
in a string
I know this can be done with gsub but I don't know how to use wildcards.
The xxxxxxx can be of any length but only numbers
You don't actually want a wildcard; you want a character class and a
quantifier. The character class is \d (which is short for [0-9]), and
the quantifier is + (one or more, assuming that if there aren't any
then this isn't one of the cases you're trying to change).
So, you'd end up with something like this:
str.gsub!(/\bid="id\d+"/, 'id="id20"')
(I tossed in a \b (word boundary) so that if it found 'david="id123"'
it wouldn't change it 
David
···
On Thu, 3 Jun 2010, Reinhart Viane wrote:
--
David A. Black, Senior Developer, Cyrus Innovation Inc.
THE Ruby training with Black/Brown/McAnally
COMPLEAT Coming to Chicago area, June 18-19, 2010!
RUBYIST http://www.compleatrubyist.com
Hi --
···
On Thu, 3 Jun 2010, Dhruva Sagar wrote:
On Thu, Jun 3, 2010 at 15:40, Reinhart Viane <rv@domos.be> wrote:
Hello,
I want to replace:
id="idxxxxxxx" with id="id20"
in a string
I know this can be done with gsub but I don't know how to use wildcards.
The xxxxxxx can be of any length but only numbers
This should do - string.gsub(/\d+/, '20')
That's a bit over-eager; it will change any sequence of digits
anywhere in the string.
David
--
David A. Black, Senior Developer, Cyrus Innovation Inc.
THE Ruby training with Black/Brown/McAnally
COMPLEAT Coming to Chicago area, June 18-19, 2010!
RUBYIST http://www.compleatrubyist.com
Thank you David!
···
-----Original Message-----
From: David A. Black [mailto:dblack@rubypal.com]
Sent: donderdag 3 juni 2010 12:18
To: ruby-talk ML
Subject: Re: gsub with wildcard
Hi --
On Thu, 3 Jun 2010, Reinhart Viane wrote:
Hello,
I want to replace:
id="idxxxxxxx" with id="id20"
in a string
I know this can be done with gsub but I don't know how to use wildcards.
The xxxxxxx can be of any length but only numbers
You don't actually want a wildcard; you want a character class and a
quantifier. The character class is \d (which is short for [0-9]), and
the quantifier is + (one or more, assuming that if there aren't any
then this isn't one of the cases you're trying to change).
So, you'd end up with something like this:
str.gsub!(/\bid="id\d+"/, 'id="id20"')
(I tossed in a \b (word boundary) so that if it found 'david="id123"'
it wouldn't change it
David
--
David A. Black, Senior Developer, Cyrus Innovation Inc.
THE Ruby training with Black/Brown/McAnally
COMPLEAT Coming to Chicago area, June 18-19, 2010!
RUBYIST http://www.compleatrubyist.com
That's right David, but I was just nudging him in the right direction :).
As per what he asked, it solves it :).
Having said that, you're solution is obviously more accurate.
···
On Thu, Jun 3, 2010 at 15:49, David A. Black <dblack@rubypal.com> wrote:
Hi --
On Thu, 3 Jun 2010, Dhruva Sagar wrote:
On Thu, Jun 3, 2010 at 15:40, Reinhart Viane <rv@domos.be> wrote:
Hello,
I want to replace:
id="idxxxxxxx" with id="id20"
in a string
I know this can be done with gsub but I don't know how to use wildcards.
The xxxxxxx can be of any length but only numbers
This should do - string.gsub(/\d+/, '20')
That's a bit over-eager; it will change any sequence of digits
anywhere in the string.David
--
David A. Black, Senior Developer, Cyrus Innovation Inc.THE Ruby training with Black/Brown/McAnally
COMPLEAT Coming to Chicago area, June 18-19, 2010!
RUBYIST http://www.compleatrubyist.com
--
Thanks & Regards,
Dhruva Sagar.