split ported to pull-stream style
var pull =var split =
if the textStream is buffers, and contain UTF8
(it probably will if you have german or chinese friends, etc)
then you MUST use this with
var pull =var split =var utf8 =
unit to split by, defaults to
function to apply to each line matched.
if true, emit lines in reverse. use this if the input is a file you are reading backwards.
use this to skip the last value if it is and empty string
if this is not set then the behavior is the same as