is-pull-stream

check what sort of pull-stream a thing is.

api

isSource (stream)

return true if stream is a source.

isSink (stream)

return true if stream is a sink.

isDuplex (stream)

return true if stream is a duplex steam.

through

a through stream is a sink that returns a source, so don't know if it's not a sink until you pass a source to it.

License

MIT