# Generate a sequence from m to n, m defaults to 1.seq (){	declare -i lo hi i	# makes local	local _SEQ INIT COMPARE STEP	case "$1" in	-r)	INIT='i=$hi _SEQ=""' COMPARE='let "i >= $lo"' STEP='let i-=1' ; shift ;;	*)	INIT='i=$lo _SEQ=""' COMPARE='let "i <= $hi"' STEP='let i+=1' ;;	esac	case $# in	1) lo=1 hi="$1" ;;	2) lo=$1 hi=$2 ;;	*) echo seq: usage: seq [-r] [low] high 1>&2 ; return 2 ;;	esac	# equivalent to the as-yet-unimplemented	# for (( "$INIT" ; "$COMPARE" ; "$STEP" )); do _SEQ="${_SEQ}$i "; done	eval "$INIT"	while eval "$COMPARE"; do		_SEQ="${_SEQ}$i "		eval "$STEP"	done	echo "${_SEQ# }"	return 0}# like the APL `iota' function (or at least how I remember it :-)iota(){	case $# in	1) seq 1 "$1"; return $?;;	*) echo "iota: usage: iota high" 1>&2; return 2;;	esac}