Re: confusion about using parallel to replace a for loop

[Joe Sapp]

On Fri, Jan 21, 2022 at 6:03 AM John <graysky@archlinux.us> wrote:

When I run the simple script below, initially, there is no output to the shell until the function finishes.  Is there a switch I can use for parallel so that the function outputs below the sleep command finishes?

#!/bin/bash
hash=( 1 2 3 4 5 6 7 8 9 )

getit() {
  echo "this is $1"

  sleep 1s
}

export -f getit
parallel -j 3 getit ::: "${hash[@]}"

Try `--line-buffer` or `--ungroup` as you prefer (the man page says `--group` is the default).

--

Joe Sapp