Complete rockPaperScissors.js

rockPaperScissors/rockPaperScissors.js

@@ -24,6 +24,25 @@
 *
 */
 
-var rockPaperScissors = function () {
-  // TODO: your solution here
+var rockPaperScissors = function (n) {
+  var result  = [];
+  var choices = ['rock', 'paper', 'scissors'];
+  var previous;
+
+  // base cases
+  if ( n <= 0 ) return result;
+  if ( n === 1 ) return [ ['rock'], ['paper'], ['scissors'] ];
+
+  previous = rockPaperScissors(n - 1);
+
+  // for each array in previous
+  previous.forEach(function (array) {
+    // for each choice in choices
+    choices.forEach(function (choice) {
+      // concatenate previous array with choice and push to result
+      result.push( Array.prototype.concat( array, choice ) );
+    });
+  });
+
+  return result;
 };