4-return-value.sh

#!/bin/sh
# Evaluating a function's return value.

# Filter with return value 0 if no match, 1 otherwise.
word_filter_2() {
    if grep -iv "$1" ; then
        return 0
    else
        return 1
    fi
}

echo "Hi, world." | word_filter_2 "hi" || echo "Invalid input for word_filter_2."

# @Test
# vim: ai et sts=4 ts=4 sw=4