Add solution #2704

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|
+2704|[To Be Or Not To Be](./2704-to-be-or-not-to-be.js)|Easy|
 2705|[Compact Object](./2705-compact-object.js)|Medium|
 2715|[Timeout Cancellation](./2715-timeout-cancellation.js)|Easy|
 2721|[Execute Asynchronous Functions in Parallel](./2721-execute-asynchronous-functions-in-parallel.js)|Medium|

solutions/2704-to-be-or-not-to-be.js

@@ -0,0 +1,28 @@
+/**
+ * 2704. To Be Or Not To Be
+ * https://leetcode.com/problems/to-be-or-not-to-be/
+ * Difficulty: Easy
+ *
+ * Write a function expect that helps developers test their code. It should take in any
+ * value val and return an object with the following two functions.
+ *
+ * - toBe(val) accepts another value and returns true if the two values === each other.
+ *   If they are not equal, it should throw an error "Not Equal".
+ * - notToBe(val) accepts another value and returns true if the two values !== each
+ *   other. If they are equal, it should throw an error "Equal".
+ */
+
+/**
+ * @param {string} val
+ * @return {Object}
+ */
+var expect = function(val) {
+  const compareHelper = (error, fn) => {
+    if (fn()) throw new Error(error);
+    return true;
+  };
+  return {
+    toBe: input => compareHelper('Not Equal', () => input !== val),
+    notToBe: input => compareHelper('Equal', () => input === val),
+  };
+};