Data commit

Task/Combinations/Groovy/combinations-1.groovy

@@ -0,0 +1,10 @@
+def comb
+comb = { m, list ->
+    def n = list.size()
+    m == 0 ?
+        [[]] :
+        (0..(n-m)).inject([]) { newlist, k ->
+            def sublist = (k+1 == n) ? [] : list[(k+1)..<n]
+            newlist += comb(m-1, sublist).collect { [list[k]] + it }
+        }
+}

Task/Combinations/Groovy/combinations-2.groovy

@@ -0,0 +1,3 @@
+def csny = [ "Crosby", "Stills", "Nash", "Young" ]
+println "Choose from ${csny}"
+(0..(csny.size())).each { i -> println "Choose ${i}:"; comb(i, csny).each { println it }; println() }

Task/Combinations/Groovy/combinations-3.groovy

@@ -0,0 +1 @@
+def comb0 = { m, n -> comb(m, (0..<n)) }

Task/Combinations/Groovy/combinations-4.groovy

@@ -0,0 +1,2 @@
+println "Choose out of 5 (zero-based):"
+(0..3).each { i -> println "Choose ${i}:"; comb0(i, 5).each { println it }; println() }

Task/Combinations/Groovy/combinations-5.groovy

@@ -0,0 +1 @@
+def comb1 = { m, n -> comb(m, (1..n)) }

Task/Combinations/Groovy/combinations-6.groovy

@@ -0,0 +1,2 @@
+println "Choose out of 5 (one-based):"
+(0..3).each { i -> println "Choose ${i}:"; comb1(i, 5).each { println it }; println() }