On Fri, Jul 28, 2017 at 12:30:15PM -0400, Ben Gamari wrote: > Tom Ellis <tom-lists-haskell-pipes-2...@jaguarpaw.co.uk> writes: > > Inspired by this discussion > > > > > > https://www.reddit.com/r/haskell/comments/6pzwnb/streaming_programs_without_laziness_a_short_primer/ > > > > I began to wonder: what are the `Proxy`s that occur in the wild that are not > > `Pipe`s? That is, when in practice do we actually need to send data back > > upstream? > > I use Proxy's bidirectionality in my b-tree library [1]: Blocks to be > written to disk are passed downstream, while the disk offset at which > the data was written is passed back upstream. This makes for a very > clean separation between the disk backend and the book-keeping involved > in building the data structure.
Does upstream need the offset in order to send the next block downstream? IF not couldn't it be a unidirectional pipe? -- You received this message because you are subscribed to the Google Groups "Haskell Pipes" group. To unsubscribe from this group and stop receiving emails from it, send an email to haskell-pipes+unsubscr...@googlegroups.com. To post to this group, send email to haskell-pipes@googlegroups.com.
