Mercurial > lasercutter
comparison src/clojure/contrib/generic/functor.clj @ 10:ef7dbbd6452c
added clojure source goodness
| author | Robert McIntyre <rlm@mit.edu> |
|---|---|
| date | Sat, 21 Aug 2010 06:25:44 -0400 |
| parents | |
| children |
comparison
equal
deleted
inserted
replaced
| 9:35cf337adfcf | 10:ef7dbbd6452c |
|---|---|
| 1 ;; Generic interface for functors | |
| 2 | |
| 3 ;; by Konrad Hinsen | |
| 4 ;; last updated May 3, 2009 | |
| 5 | |
| 6 ;; Copyright (c) Konrad Hinsen, 2009. All rights reserved. The use | |
| 7 ;; and distribution terms for this software are covered by the Eclipse | |
| 8 ;; Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php) | |
| 9 ;; which can be found in the file epl-v10.html at the root of this | |
| 10 ;; distribution. By using this software in any fashion, you are | |
| 11 ;; agreeing to be bound by the terms of this license. You must not | |
| 12 ;; remove this notice, or any other, from this software. | |
| 13 | |
| 14 (ns | |
| 15 ^{:author "Konrad Hinsen" | |
| 16 :doc "Generic functor interface (fmap)"} | |
| 17 clojure.contrib.generic.functor) | |
| 18 | |
| 19 | |
| 20 (defmulti fmap | |
| 21 "Applies function f to each item in the data structure s and returns | |
| 22 a structure of the same kind." | |
| 23 {:arglists '([f s])} | |
| 24 (fn [f s] (type s))) | |
| 25 | |
| 26 (defmethod fmap clojure.lang.IPersistentList | |
| 27 [f v] | |
| 28 (into (empty v) (map f v))) | |
| 29 | |
| 30 (defmethod fmap clojure.lang.IPersistentVector | |
| 31 [f v] | |
| 32 (into (empty v) (map f v))) | |
| 33 | |
| 34 (defmethod fmap clojure.lang.IPersistentMap | |
| 35 [f m] | |
| 36 (into (empty m) (for [[k v] m] [k (f v)]))) | |
| 37 | |
| 38 (defmethod fmap clojure.lang.IPersistentSet | |
| 39 [f s] | |
| 40 (into (empty s) (map f s))) |