You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
DevOps-Bash-tools/random_select.sh

36 lines
672 B
Bash

#!/usr/bin/env bash
# vim:ts=4:sts=4:sw=4:et
#
# Author: Hari Sekhon
# Date: 2016-08-01 17:53:24 +0100 (Mon, 01 Aug 2016)
#
# https://github.com/HariSekhon/DevOps-Bash-tools
#
# License: see accompanying Hari Sekhon LICENSE file
#
# If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
#
# https://www.linkedin.com/in/HariSekhon
#
set -eu
[ -n "${DEBUG:-}" ] && set -x
if [ -z "$*" ]; then
echo "usage: ${0##*/} arg1 arg2 arg3 ..."
exit 1
fi
i=0
for x in "$@"; do
a[$i]="$x"
((i + 1))
done
num=${#@}
selected=$((RANDOM % num))
echo "${a[$selected]}"