Re: Create functional processing pipe (without eval)?

On 2025-05-07, Janis Papanagnou <janis_papanagnou+ng@hotmail.com> wrote:

  function recurse
  {
      if [[ $# -ge 1 ]]
      then grep "$1" | (shift; recurse "$@")
      else cat
      fi
  }

>
I certainly need a "transparent" (idempotent) function if there are no
arguments provided, so a 'cat' is what I need in that case. (An empty
output would definitely be wrong for me.) And the unnecessary 'cat' at
the pipe end(s) is an acceptable unimportant degradation (for me). But
if you have an idea how to remove it... :-)

recurse()
{
        case $# in
        0) cat ;;
        1) grep "$1" ;;
        *) grep "$1" | (shift; recurse "$@") ;;
        esac
}

--
Christian "naddy" Weisgerber                          naddy@mips.inka.de