#!/usr/bin/env bash
set -euo pipefail

without_null=(empty/*.log)
printf "without nullglob:\n"
printf "count=%s\n" "${#without_null[@]}"
printf "value=%s\n" "${without_null[0]}"

shopt -s nullglob
with_null=(empty/*.log)
printf "with nullglob:\n"
printf "count=%s\n" "${#with_null[@]}"

shopt -s dotglob
dot_matches=(reports/*.log)
printf "with dotglob:\n"
printf "%s\n" "${dot_matches[@]}"

shopt -s globstar
recursive_matches=(reports/**/*.log)
printf "with globstar:\n"
printf "%s\n" "${recursive_matches[@]}"