From: Josselin <josselin@...>
Date: 2007-04-27T22:15:11+09:00
Subject: Re: string replacement...

On 2007-04-27 09:36:31 +0200, Stefano Crocco <stefano.crocco@alice.it> said:

> Alle venerd� 27 aprile 2007, Josselin ha scritto:
>> I have a string :  str = "/proposal/list/31551"
>> 
>> I would like to change the 31551 by another value "9999", but I don't
>> see whicj method I should use ?
>> 
>> str.each  and block ? or str.rindex('/') and concatenating the new value ?
>> 
>> tfyh
>> 
>> joss
> 
> If the text you need to replace is always at the end of the string, you can
> 
> do:
> 
> str.sub /\d+$/, '9999'
> 
> This will replace the text matching the regexp (i.e, one or more digit
> followed by the end of the line) with the given string (note that this won'
> t
> change the original string, but return a new one. If you need to change the
> 
> original one, use sub! instead of sub).
> 
> I hope this helps
> 
> Stefano

Thnaks Stefano , it gives the expected result

irb(main):007:0> str = "/proposals/list/31555"
=> "/proposals/list/31555"
irb(main):008:0> str.sub /\d+$/, '9999'
=> "/proposals/list/9999"

;-)))