pipes-ordered-zip

merge two ordered Producers into a new Producer https://github.com/githubuser/pipes-ordered-zip#readme

This package is not currently in any snapshots. If you're interested in using it, we recommend adding it to Stackage Nightly. Doing so will make builds more reliable, and allow stackage.org to host generated Haddocks.

BSD-3-Clause licensed by Stephan Schiffels

pipes-ordered-zip

A function to tie together two sorted Haskell Iterators (Producers from the pipes library).

Example:

import Pipes (runEffect, (>->), each)
import qualified Pipes.Prelude as P
import Pipes.OrderedZip (orderedZip)

main = do
    let a = each [1,3,4,6,8] -- has to be ordered
        b = each [2,3,4,5,8] -- has to be ordered
    let mergedProd = orderedZip compare a b
    _ <- runEffect $ mergedProd >-> P.print
    return ()

prints:

(Just 1,Nothing)
(Nothing,Just 2)
(Just 3,Just 3)
(Just 4,Just 4)
(Nothing,Just 5)
(Just 6,Nothing)
(Just 8,Just 8)

Changes

  • Version 1.0.0.0: Initial commit with example, tests and haddock

  • Version 1.0.0.1: Added a note that input sequences have to be sorted.

  • V 1.1.0: Added new function to check ordering of incoming pipes