swift-transducers

Port of Clojure's transducers to Apple's Swift language

Motivation

Clojure's transducers represent an elegant and high-efficient way to transform data. JS implementation fared well, so I decided to try implementing them in Swift as well.

Examples

transduce(
    map({$0 + 1}) |>
    filter({$0 % 2 == 0}) |>
    map({$0 * 2}), append, [], [1, 2, 3, 4, 5])

// [4, 8, 12]

Code above is roughly equvivalent to following code with regular map / filter calls:

[1, 2, 3, 4, 5]
    .map({$0 + 1})
    .filter({$0 % 2 == 0})
    .map({$0 * 2})

Performance

Currently it is anything but ready for production use. As tested on Xcode Version 6.1.1 (6A2008a), it is at least 100x worse than standard map / filter chain.