fix issue 14: set.clj from Jason Wolfe

1 files changed, 40 insertions, 0 deletions

diff --git a/src/clojure/contrib/set.clj b/src/clojure/contrib/set.clj
new file mode 100644
index 00000000..2e8c76a4
--- /dev/null
+++ b/src/clojure/contrib/set.clj
@@ -0,0 +1,40 @@
+;;  Copyright (c) Jason Wolfe. All rights reserved.  The use and
+;;  distribution terms for this software are covered by the Eclipse Public
+;;  License 1.0 (http://opensource.org/licenses/eclipse-1.0.php) which can
+;;  be found in the file epl-v10.html at the root of this distribution.  By
+;;  using this software in any fashion, you are agreeing to be bound by the
+;;  terms of this license.  You must not remove this notice, or any other,
+;;  from this software.
+;;
+;;  set.clj
+;;
+;;  Clojure functions for operating on sets (supplemental to clojure.set)
+;;
+;;  jason at w01fe dot com
+;;  Created 2 Feb 2009
+
+(ns clojure.contrib.set)
+
+(defn subset? 
+  "Is set1 a subset of set2?"
+  [set1 set2]
+  (and (<= (count set1) (count set2))
+       (every? set2 set1)))
+
+(defn superset? 
+  "Is set1 a superset of set2?"
+  [set1 set2]
+  (and (>= (count set1) (count set2))
+       (every? set1 set2)))
+
+(defn proper-subset? 
+  "Is s1 a proper subset of s2?"
+  [set1 set2]
+  (and (< (count set1) (count set2))
+       (every? set2 set1)))
+
+(defn proper-superset? 
+  "Is s1 a proper superset of s2?"
+  [set1 set2]
+  (and (> (count set1) (count set2))
+       (every? set1 set2)))