Bash

# For-loop one-liners
for i in {1..5}; do echo "$i"; done
for line in $(cat sample.txt); do echo "$line"; done

# Multiline input
command <<DATA
multi
line
DATA

# Current script dir
SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"