From: "Jean-François Trân" <jftran@...>
Date: 2008-03-07T04:10:49+09:00
Subject: Re: Sequence reduction

2008/3/6, Stephen Fickas <fickas@cs.uoregon.edu>:

> I'd like to take a string like that below
>
>  "0011122234667889"
>
>  and reduce to
>
>  "012346789"
>
>  I can see ways to do it for a single digit, but
>  not all in one fell swoop:
>
>  "0011122234667889".gsub(/1{2,}/, "1")
> #reduce seq (2 or more) of 1s to
>  single 1
>
>  "0011122234667889".gsub(/1+/, "1") #1 or more 1s to single 1

My first try would be :

"0011122234667889".gsub /(\d)\1+/, '\1'

    -- Jean-François.