Common things between Maps and Sets Both share common properties and methods Both are iterable which means you can loop over them. WeakMaps and WeakSets don't prevent object from being garbage collected. Maps Maps are unique because they are collec...
A set is a collection of distinct items. For example, {2, 4, 5, 6} is a set because each number is unique and appears only once. However, {1, 1, 2, 4} is not a set because it contains duplicate entries (the 1 is in there more than once!). const nums ...
Primitive data types Symbols are new addition in ES6 to primitive data types. Previously numbers, strings, boolean, null, undefined were primitive data types. Symbol Symbol is just a unique identifier. Its most often used to uniquely identify propert...
Well in other languages, we use classes to create objects and provide inheritance. In JavaScript we use function to create objects. And being able to inherit data and functionality in JavaScript happens through prototypal inheritance. So JavaScript s...
Take a look at this code: function greet(name, greeting) { name = (typeof name !== 'undefined') ? name : 'Student'; greeting = (typeof greeting !== 'undefined') ? greeting : 'Welcome'; return `${greeting} ${name}!`; } greet(); // Welcome St...
Functions are one of the primary data structures in JavaScript; Arrow functions ES6 introduces a new kind of function called the arrow function. Arrow functions are very similar to regular functions in behavior, but are quite different syntactically....