RE: regexp quickie

[Roy.Johnson]

> If you want $2 to only ever be the first letter at or after the target
> location, you can just tweak the second half of the regex:
> 
> /^(?=.{0,$r}([^_]))?(?:.{$r}.*?([^_]))?/

Save a stroke:
  /^(?=.{0,$r}([^_]))?(?:.{$r,}?([^_]))?/

Roy