Data commit

Task/Knuth-shuffle/Groovy/knuth-shuffle-1.groovy

@@ -0,0 +1,10 @@
+def shuffle = { list ->
+    if (list == null || list.empty) return list
+    def r = new Random()
+    def n = list.size()
+    (n..1).each { i ->
+        def j = r.nextInt(i)
+        list[[i-1, j]] = list[[j, i-1]]
+    }
+    list
+}

Task/Knuth-shuffle/Groovy/knuth-shuffle-2.groovy

@@ -0,0 +1,5 @@
+def list = [] + (0..20)
+println list
+println shuffle(list)
+println shuffle(list)
+println shuffle(list)