The map() method is a built-in function in JavaScript that creates a new array by calling a provided function on each element of the original array. The map() method does not modify the original array; instead, it returns a new array with the results of the function calls on each eleme...
Introduced in ES8, theObject.entries()method takes an object as an argument and returns an array of object's enumerable property[key, value]pairs. The following is true about the array resulting fromObject.entries(): Each element of the array is guaranteed to itself be an array consisting of...
JavaScript map. The ‘map’ method provides a powerful means of rearranging arrays. It allows your list to be transcribed into another list, often with just a single line. JavaScript download. You can also use JavaScript to download files, which is very useful when you’re trying to retrieve...
We add contacts to HashMap using the put() method, specifying the key-value pairs. We can retrieve a specific contact’s phone number using the get() method, passing the corresponding name. In order to verify the presence of a contact within the HashMap, one can utilize the containsKey(...
1) When calling directly, it points to the global object (undefined in strict mode) function fnc() { console.log(this); } fnc(); // 全局对象(global 或 window) 2) When the method is called, it points to the object that called the method ...
JavaScript code is transformed into code that lacks coherent structure. The program’s logic never appears to return to a base point, but simply moves from routine to routine. The strength of control flow obfuscation lies in its unpredictability; this makes the code difficult for both human eyes...
ExpressJS is a powerful web application framework that provides a range of features that make it easier to build and maintain web applications. Below are some of the key features of ExpressJS: RoutingExpressJS provides a simple and organized way to handle different HTTP requests and map them to...
AnArrow FunctioninJavaScriptis a syntactically compact option/ alternative to a regular function expression. These are anonymous functions with their unique syntax that accept a fixed number of arguments and operate in the context of their enclosing scope - i.e., the function or other code where ...
Vue.js is always developing and improving because it is relatively new to the scene. So, because of these factors, Vue.js hasn’t caught on as much as other JavaScript frameworks like Angular and React. Furthermore, most of Vue’s code has been scripted in Chinese, which causes issues fo...
JavaScript is a scripting language mainly used for writing dynamic Web pages. When a script written in JavaScript is embedded in a Web page, it will be executed by the Web browser on the client machine. The history of JavaScript is nicely summarized on wikipedia.org as: JavaScript...