j.sh

#!/usr/bin/env bash

function w8() {
	for p in "${@}";
	do
		wait -n "${p}" 2> /dev/null &
	done;
	wait -n
}

function _j() {
	TODO="${1}";
	TARGETs=(${@:2});
	pids=();
	for j in "${TARGETs[@]}";
	do
		pids+=($!);
		eval "${TODO} ${j}" &
	done;
	w8 "${pids[@]}"
}

function j() {
	[[ ! -z "${*}" ]] && ( _j "${@}" )
}