From: RichardOnRails <RichardDummyMailbox58407@...>
Date: 2008-08-04T03:13:49+09:00
Subject: Re: Look-around not working in ruby 1.9.0 or my mistake?

On Aug 3, 1:03 pm, RichardOnRails
<RichardDummyMailbox58...@uscomputergurus.com> wrote:
> Hi,
>
> I just installed ruby 1.9.0 (2008-07-25 revision 18217) [i386-mswin32]
> in order get Ruby look-behind functionality.  I expected the following
> snippet to insert a substring, but it did nothing:
>
> Ruby:
>   printf("item = \"%s\"\n", item) if $DEBUG
>   printf("item basename = \"%s\"\n", File.basename(item)) if $DEBUG
>   item.sub!( /(?<=Investment-\d\d\.\d\d)(?=-)/, '.2008')
>   printf("new item  base = \"%s\"\n", File.basename(item)) if $DEBUG
>
> Output:
> item = "K:\___Investment\2008-Trades\Investments-06.19-2100.xls"
> item basename = "Investments-06.19-2100.xls"
> new item  base = "Investments-06.19-2100.xls"
>
> Expected:
> new item  base = "Investments-06.19.2008-2100.xls"
>
> Any idea of what's wrong?
>
> TIA,
> Richard

Hi All,

The answer is my mistake :-(
I left the "s" out of "investments", i.e the sub. statement should
have been:

  item.sub!( /(?<=Investments-\d\d\.\d\d)(?=[-])/, '.2008')

I apologize for posting a false alarm.

Best wishes,
Richard