CDE

Task/Combinations/JavaScript/combinations-1.js

@@ -0,0 +1,18 @@
+function bitprint(u) {
+  var s="";
+  for (var n=0; u; ++n, u>>=1)
+    if (u&1) s+=n+" ";
+  return s;
+}
+function bitcount(u) {
+  for (var n=0; u; ++n, u=u&(u-1));
+  return n;
+}
+function comb(c,n) {
+  var s=[];
+  for (var u=0; u<1<<n; u++)
+    if (bitcount(u)==c)
+      s.push(bitprint(u))
+  return s.sort();
+}
+comb(3,5)