CDE

Task/Combinations/Go/combinations.go

@@ -0,0 +1,29 @@
+package main
+
+import (
+    "fmt"
+)
+
+func main() {
+    comb(5, 3, func(c []int) {
+        fmt.Println(c)
+    })
+}
+
+func comb(n, m int, emit func([]int)) {
+    s := make([]int, m)
+    last := m - 1
+    var rc func(int, int)
+    rc = func(i, next int) {
+        for j := next; j < n; j++ {
+            s[i] = j
+            if i == last {
+                emit(s)
+            } else {
+                rc(i+1, j+1)
+            }
+        }
+        return
+    }
+    rc(0, 0)
+}