Add solution #2715

Author: JoshCrozier

README.md

@@ -407,6 +407,7 @@
 2677|[Chunk Array](./2677-chunk-array.js)|Easy|
 2695|[Array Wrapper](./2695-array-wrapper.js)|Easy|
 2703|[Return Length of Arguments Passed](./2703-return-length-of-arguments-passed.js)|Easy|
+2715|[Timeout Cancellation](./2715-timeout-cancellation.js)|Easy|
 2721|[Execute Asynchronous Functions in Parallel](./2721-execute-asynchronous-functions-in-parallel.js)|Medium|
 2722|[Join Two Arrays by ID](./2722-join-two-arrays-by-id.js)|Medium|
 2724|[Sort By](./2724-sort-by.js)|Easy|

solutions/2715-timeout-cancellation.js

@@ -0,0 +1,28 @@
+/**
+ * 2715. Timeout Cancellation
+ * https://leetcode.com/problems/timeout-cancellation/
+ * Difficulty: Easy
+ *
+ * Given a function fn, an array of arguments args, and a timeout t in milliseconds,
+ * return a cancel function cancelFn.
+ *
+ * After a delay of cancelTimeMs, the returned cancel function cancelFn will be invoked.
+ * > setTimeout(cancelFn, cancelTimeMs)
+ *
+ * Initially, the execution of the function fn should be delayed by t milliseconds.
+ *
+ * If, before the delay of t milliseconds, the function cancelFn is invoked, it should
+ * cancel the delayed execution of fn. Otherwise, if cancelFn is not invoked within the
+ * specified delay t, fn should be executed with the provided args as arguments.
+ */
+
+/**
+ * @param {Function} fn
+ * @param {Array} args
+ * @param {number} t
+ * @return {Function}
+ */
+var cancellable = function(fn, args, t) {
+  const timeoutId = setTimeout(() => fn(...args), t);
+  return () => clearTimeout(timeoutId);
+};