Shixiong Zhu zsxwing

## comment.sh
# one line comment
:<<test
Multiple lines comment.
test

## usage.sh
usage() {
  cat <<END;
ez_mail TITLE CONTENT FROM_ADDRESS RECIEVER_ADDRESS
EXAMPLE
  ez_mail 'Hello World!' 'Hi!' example@example.com somebody@example.com
END
}

## error_log.sh
err() {
  echo "[$(date +'%Y-%m-%dT%H:%M:%S%z')]: $@" >&2
}

## long_string.sh
# output "I am an exceptionally long string."
long_string="I am an exceptionally
                 long string."
echo ${long_string}

## iter_lines.sh
while read line; do
  echo $line;
done < <(cat test.txt)

## argument.sh
set -- a b c
echo "$1 $2 $3"
	usage() {
	cat <<END;
	ez_mail TITLE CONTENT FROM_ADDRESS RECIEVER_ADDRESS
	EXAMPLE
	ez_mail 'Hello World!' 'Hi!' example@example.com somebody@example.com
	END
	}
	# output "I am an exceptionally long string."
	long_string="I am an exceptionally
	long string."
	echo ${long_string}