From: Yan-Fa Li <yanfali@...>
Date: 2003-11-18T10:16:27+09:00
Subject: Re: regexp indexes to strings

I think it doesn't work because your regexp only has one capture group.  
If you
define multiple capture groups it works just fine:

a="123-456-1239"
a[/([0-9]{3,3})-([0-9]{3,3})-([0-9]{3,4})/,2]="XXX"

I tested this in IRB and it seems work just fine.  I don't know if 
there's a more efficient way to do
this that is less complex looking but it does work.  Let me know if you 
need help decoding this regexp,
but I think it's fairly self explanatory.

Yan

Rob Partington wrote:

>This is good stuff.  Except it doesn't extend.
>
>  irb(main):005:0> a="123-456-1239"
>  => "123-456-1239"
>  irb(main):006:0> a[/123/, 2]="xxx"
>  IndexError: index 2 out of regexp
>          from (irb):6:in `[]='
>          from (irb):6
>  irb(main):007:0> a[/123/, 1]="xxx"
>  IndexError: index 1 out of regexp
>          from (irb):7:in `[]='
>          from (irb):7
>  irb(main):008:0> a
>  => "123-456-1239"
>
>Bah!  This would really rule.
>  
>