The rest parameter syntax or Rest Operator in JavaScript allows us to handle the infinite number of parameters as an array. Basically, It improved the way of handling parameters of the function. Basic Example In the above example of the Rest Operator in JavaScript, we created the function called fun and receiving the arr parameter
This is an advance guide of JavaScript Arrow Function and If you directly visited this page so I’ll suggest you first read part 1 here. Let’s continue, #4 This Keyword #4.1 No separate this Every function in Javascript defined its own this value, but that’s the beauty of arrow function it doesn’t do that. Let’s understand
An Arrow Function in JavaScript also called a “Fat arrow” function is a syntactically compact alternative to a regular function expression. It allows us to write shorter function syntax. Arrow functions are anonymous and change the way this binds in functions. Arrow functions doesn’t support its own bindings to the this, arguments, super, or new.target
JavaScript includes method is very handy when you need to search or find something in the array or string, yes it works on both. It returns the Boolean value true if the array contains the value and false if not, and the same applied to the strings. Note: When comparing strings and characters JavaScript includes
The JavaScript array forEach method accepts the callback method and executes it once for each element of the array, in order to skip non-existent entries in sparse arrays. Here is a quick and simple example. Although I only used one argument above. But, it takes three arguments: The value of each entry, the index of
Swapping two variables normally requires a temporary variable or XOR swap algorithm as shown in example #2. We will learn two types of condition and 5 types of methods of swapping two variables in JavaScript. 1. #2 and #3 examples are valid if the variable is a type of number 2. And the rest of the
In simple words: JavaScript Tagged template literal is a function call that uses a template literal to get its arguments. Here is a tagged function example: Don’t get yourself confused, In the above example, greet is a function that takes three arguments 1. The first parameter is an array containing all of the text from
Template literals (Template strings) are one of the amazing features of JavaScript. You can use multi-line strings, string interpolation and more features with them and this is the easiest way to improve your JavaScript code readability. Introduced in ES6. Okay, that’s great! Show me an example. Template literals in ES6 Syntax Don’t get confused, It
Spread Operator in ES6 or syntax (well according to MDN it is syntax) so let’s call it syntax. Well, they also call it three dot operator. So how it looks like? Oh, it is simply three dots … When did it release? Of course in ES6. What it actually does? The spread operator in ES6
Yes, it is possible to use a couple of NOT (!) operators together in JavaScript. JavaScript double not operator returns a Boolean value that depends on the expression’s truthfulness. So, the double not operator !! is not an operator, it’s just the “Logical NOT ” ! operator twice. And there are no restrictions on using more than twice
