Use find if you want to get the matched object from array else returns undefined . Quoting MDN: The find() method returns the value of the first element in ... ... <看更多>

ToObject(this value). var o = Object(this); // 2. Let len be ? LengthOfArrayLike(O) ... <看更多>

This tutorial shows you how to use the JavaScript Array includes() method to ... how to use the includes() method to check if an object is in an array. ... <看更多>

In this video tutorial, you will learn how to check if an array includes reference of an object in javascript. ... <看更多>

Where the `filters` argument is an object that contains a `key: string`. * and its value is a function with the value of the property to evaluate. ... <看更多>