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

files=("app.log" "db backup.log")
files+=("web.log")

declare -A owners=(
    [app]="alice"
    [db]="maria"
)

printf "first file: %s\n" "${files[0]}"
printf "all files: %s\n" "${files[*]}"
printf "file count: %s\n" "${#files[@]}"
printf "db owner: %s\n" "${owners[db]}"

for file in "${files[@]}"; do
    printf "check <%s>\n" "$file"
done

unset 'files[1]'
printf "remaining files: %s\n" "${files[*]}"