Techformist

Private Variables in Javascript Class

📅 Nov 29, 2018 · 📝 Jun 9, 2020 · ☕ 2 min read

We define a class and its variables like so - 1 2 3 4 5 6 7 8 9 10 11 12 class UserData { name = ""; type = ""; internalUserFlag = false; constructor({ name, type }) { this.name = name; this.type = type; } } const student1 = new UserData({ name: "Neo" }); console.

Extending Class in Javascript

📅 Nov 28, 2018 · 📝 Jun 9, 2020 · ☕ 4 min read

Extend a class and create a sub class for easier maintainability. Sub class can make use of special super functions to extend the functionality of a class. Using sub classes you can build out a complex logic in steps rather than as one messy module. See how to start with a Javascript class and class prototypes if you are new to Javascript classes.

Using Prototypes in Javascript Class

📅 Nov 27, 2018 · 📝 Jun 9, 2020 · ☕ 3 min read

Prototypes enable us to define attributes and functions of a class that can be shared across its object instances. Let us look at how we could start using prototypes in our Javascript classes. See how to start with a Javascript class if you are new to Javascript classes. Class in Javascript is built internally using prototypes - in fact that was the way some of us were reaching OOP nirvana in Javascript back in the day.

How to Use Javascript Class?

📅 Nov 26, 2018 · 📝 Jun 9, 2020 · ☕ 2 min read

Class in Javascript is syntactic sugar on top of prototypes. Class makes it easier to structure our code, and to read and maintain it. Let’s see a simple class. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 class QuizTracker { constructor() { this.

Array Sort in Javascript

📅 Nov 25, 2018 · 📝 Jun 9, 2020 · ☕ 2 min read

Arrays in Javascript can be sorted using a simple .sort command. But, don’t let that simplicity deceive you - it goes far more than that. 1 2 let arr = [4, 2, 1, 7, 3]; console.log(arr.sort()); // [ 1, 2, 3, 4, 7 ] Sort can be used against full strings -

Arrays in Javascript

📅 Nov 24, 2018 · 📝 Jun 9, 2020 · ☕ 6 min read

Array is a collection of elements or objects, and is quite easy to use in Javascript. Here’s an example of array: 1 const fruits = ["apple", "orange"]; You can print out the entire array.. 1 2 const fruits = ["apple", "orange"]; console.log("fruits: ", fruits); //fruits: [ 'apple', 'orange' ] .

Passing Arguments to a Javascript Function

📅 Nov 23, 2018 · 📝 Apr 30, 2020 · ☕ 2 min read

You can pass one or more values to a function, but that has been made much easier and streamlined with the advent of ES2015 - 2018 standards. Let’s start with a simple function. 1 2 3 4 5 6 function sum(x, y) { return x + y; } const summer = sum(3, 6); console.

Return Multiple Values from Javascript Function

📅 Nov 22, 2018 · 📝 Jun 9, 2020 · ☕ 1 min read

A Javascript function returns one and only one value. 1 2 3 4 5 6 function sum(x, y) { return 3 + 39; } let life = sum(3, 39); console.log(life); // 42 I bet you already knew that not returning a value from a function, would return ‘undefined’.

Logical Operators in Javascript

📅 Nov 21, 2018 · 📝 Jun 9, 2020 · ☕ 3 min read

AND (&&), Not (!), OR (||) are logical operators in Javascript. You will see that they are the only operators that make up for the entirety of one’s life experiences. Logical operators evaluate two values or expressions, and provide a true or false result. Let us see some examples to know the rules of the game.

Comparison Operators in Javascript

📅 Nov 20, 2018 · 📝 Jun 9, 2020 · ☕ 2 min read

Equals (==), not equals (!=), greater than (>), lesser than (<) - Javascript comparison operators cannot get more simple. Let’s dissect these operators a bit. Comparison operators are the ones that you use to.. well, compare. For example: 1 2 3 4 5 6 7 let numCoffee = 3; if (numCoffee < 2) console.

Objects and Props in Javascript

📅 Nov 19, 2018 · 📝 Jun 9, 2020 · ☕ 6 min read

Know how you can use a Javascript object and its props. Javascript objects have properties or props. As you would have seen in the post about objects and primitives, object operations are quite easy. Though objects can mean more than a few things in Javascript, we will limit discussion of an object to the ** real real ** object.

Objects and Primitives in Javascript

📅 Nov 18, 2018 · 📝 Jun 9, 2020 · ☕ 3 min read

Get to know all the practical knowledge about Javascript primitives and objects. In JavaScript, objects are king. If you understand objects, you understand JavaScript. - W3 Schools Everything except primitives is an object in Javascript. A couple of days back, we were talking about Javascript having the following primitives: bool, number, string, undefined and null.

Type Casting in Javascript

📅 Nov 17, 2018 · 📝 Apr 30, 2020 · ☕ 2 min read

Don’t know how to type? Get a typewriter. I always wanted to say that. But, if indeed you don’t know types - you can always head over to Javascript types to know more**. So, you know there are types. And, you also know that there can be many a problem in the lousy world of loose typing.