2666

1 files changed, 12 insertions, 0 deletions

diff --git a/2666/main.js b/2666/main.js
new file mode 100755
index 0000000..8211bb7
--- /dev/null
+++ b/2666/main.js
@@ -0,0 +1,12 @@
+#!/usr/bin/env node
+var once = function (fn) {
+  var called = false;
+  return function (...args) {
+    if (called) {
+      return undefined;
+    } else {
+      called = true;
+      return fn(...args);
+    }
+  };
+};