Speaking of counting...

[Tom Culliton <culliton@clark.net>]

Does anyone have a nice little generic range function for rc?  The
type of thing that lets generate a list something like the indices
from a fortran or basic for statement.  (I'm actually modelling this
after the one in python.)

1 argument means	for (i = 0; i < $1; i += 1)
2 arguments mean	for (i = $1; i < $2; i += 1)
3 arguments mean	for (i = $1;
			     ($3 > 0 && i < $2) || ($3 > 0 && i > $2;
			     i += $3)

For example...

	# echo 99 down to but not including 0
	for (i in `{range 99 0 -1}) echo $i
	# echo 0 up to but not including 10
	for (i in `{range 0 10}) echo $i
	# echo 0 up to but not including 10 stepping 2
	for (i in `{range 0 10 2}) echo $i
	# echo 0 up to but not including 10
	for (i in `{range 10}) echo $i

I could whip something up using awk, but someone must already have one!

Tom