describe('all',function(){//check return typeit('should be an array of strings',function(){ expect(starWars.all).to.satisfy(isArrayOfString);functionisArrayOfString(array){returnarray.every(function(item){returntypeofitem === 'string'; }); } });//ccheck one of the valueit('should i...
write(d); function Date() { return 'This is the overriden function.'; } alert(Date()); Try to Overload a Function in JavaScript JavaScript does not allow overloading a function. Instead, it will override the function. We will create two functions named sum to add different numbers of...
Themap()method creates a new array with the results of a function call on each element in the array. For an example of how to use the iteration methodmap(), we can print each iteration of a loop to the console.map()does not mutate the original array, it instead returns a new ...
In JavaScript, the filter() method uses a callback function or arrow function to iterate through each element in an existing array, and only returns the ones that pass the specified test/conditions. Elements that pass are then placed into a new array.Using filter() doesn’t change the origi...
✨ Learn to build modern web applications using JavaScript and Spring Boot I started this blog as a place to share everything I have learned in the last decade. I write about modern JavaScript, Node.js, Spring Boot, core Java, RESTful APIs, and all things web development. The ...
For additional guidance on JavaScript in general, you can review ourHow To Code in JavaScriptseries. Object.create() TheObject.create()method is used to create a new object and link it to the prototype of an existing object. We can create ajobobject instance, and extend it to a more spe...
In the process of building the blog, we have, for practical needs, in"VuePress blog optimization of expansion Markdown syntax"in explaining how to write amarkdown-itplug-in, but also in"Markdown-IT principles to resolve"are explainedmarkdown-itIn this article, we will explain the specific ...
Let us see some examples of using the find method! Find an object on a fixed criterion We have a tasks array as shown in the listing below: var tasks = [ { 'Id': '1', 'Title': 'Go to Market 99', 'Status': 'done' }, ...
Invoking function in JavaScript: Here, we are going to learn how to invoke a function call in JavaScript?
#1 might give you a clue of how the todo app will work. Without JavaScript we have no way to modify the DOM. That means all todo items have to be part of the initial page HTML. If you view the source of the page you’ll find it already contains 50 pre-rendered todo items. ...