Re: Verifying numeric values

[Chris F.A. Johnson]

On Mon, 18 Oct 2021, Chris F.A. Johnson wrote:

> On Mon, 18 Oct 2021, Chris F.A. Johnson wrote:
>
> > On Tue, 19 Oct 2021, tolugboji via wrote:
> >
> > > Would like to validate a numeric value (from 1 to 255, for use with 
> > > terminfo).
> > >
> > > Am doing ( +([[:digit:]]) ), but I suspect that does not do the job
> > >
> > > case "$2" in
> > > ( +([[:digit:]]) )
> >
> > case ${num//[0-9]/} in
> >  ?*) echo bad ;;
> >  *) echo OK ;;
> > esac
>
> Oops! Wrong version. Should be:
>
> case ${num//[0-9]/} in
>  ?*|"") echo bad ;;
>  *)echo OK ;;
> esac

I need some sleep. Let's try again:

  num=${1:-x}
  case ${num//[0-9]/} in
    ?*) echo bad ;;
    *) echo OK ;;
  esac

--
   Chris F.A. Johnson