Create 2666-allow-one-function-call.js

Author: dmgodoy

javascript/2666-allow-one-function-call.js

@@ -0,0 +1,21 @@
+/**
+ * @param {Function} fn
+ * @return {Function}
+ */
+var once = function (fn) {
+    let called = false;
+    return function (...args) {
+        if (!called) {
+            called = true;
+            return fn(...args);
+        }
+    }
+};
+
+/**
+ * let fn = (a,b,c) => (a + b + c)
+ * let onceFn = once(fn)
+ *
+ * onceFn(1,2,3); // 6
+ * onceFn(2,3,6); // returns undefined without calling fn
+ */