Javascript: Class Inheritance
Inheritance is an important concept in Object Oriented Programming. Inheritance is the process whereby one class, also called the sub-class, ...
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Javascript: Object Oriented Programming
Object Oriented Programming (OOP) is a way of writing code such that you can create different objects (also called "instances") ...
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Javascript: Working With Classes
Introduced in ES6 as a major update to the Object Oriented Programming concept in Javascript, Classes are templates for creating ...
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Null, Undefined and “Not defined”
Null: Null is the intentional absence of any object value. This could be a property of an object, or an ...
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Callbacks, Promises and Async Await
Callback functions, Promises, and Async Await are concepts fundamentally used by JavaScript to handle deferred operations. Sometimes an operation could ...
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React Native: ActivityIndicator
In React Native, an ActivityIndicator displays a loading circular mark which signals to the user that a task is being ...
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React Native: Make a POST Request Using Fetch
What is a POST Request? The POST request is part of the Http methods which is used as a request ...
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React Lifecycle Methods: ComponentDidMount
The componentDidMount() lifecycle method is called immediately after a component is mounted or, in simple terms, when that particular component ...
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React Native: How to add Background Image
As a software developer, there are times when you may need to set background image for your application based on ...
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Getting Started With React Native: Create a Class Component
The React Library allows you to define components either as classes or functions. These components allows you to split your ...
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React Native: Remove Item From AsyncStorage
React Native's AsyncStorage provides a light storage system where you can both store and retrieve stored items. But what happens ...
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Java: Number Class
Usually in Java when we work with numbers, we will represent these numbers with any of the available primitive data ...
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React Native: Working With State
When working with React, in this case React Native, there are times when you might need a value to be ...
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Javascript: Rest Parameters
The rest parameter is an ES6 syntax that is used to represent an indefinite number of elements as an array ...
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Retrieve Data From AsyncStorage
The AsyncStorage presents a simple and elegant way for React Native developers to store and retrieve data. We've already covered ...
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React Native: Store Items in AsyncStorage
The AsyncStorage lets you store some reasonable amount of data on users' device. Let's see how we can make that ...
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React Native: Working With AsyncStorage
According to the React Native docs, AsyncStorage is an unencrypted, asynchronous, persistent key-value storage system that is global to the ...
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To Reverse A String: StringBuffer in Java
Java provides the StringBuffer and String classes. The String class is used to manipulate character strings that cannot be changed ...
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Working With XMLHttpRequest
The XMLHttpRequest is a Javascript object that is used to interact with web servers. The XMLHttpRequest() is a Javascript function ...
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Working With Fetch API
If you are writing a web application, there is every possibility that at some point you will have to work ...
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Switch Case
A switch statement gives an expression a value to evaluate and several different statements to execute based on the value ...
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Debugging Your Javascript Code
Web browsers generally have consoles, which are interactive command lines where you can print text and test pieces of code ...
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Pure And Impure Functions in Javascript
Pure Functions A pure function in Javascript is one that given the same input will always return the same output ...
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Return Statements in Java
In a return statement in Java, we evaluate expressions, and as part of this evaluation, other methods may run in ...
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Access Modifiers in Java
Modifiers are keywords that are added to variables, methods and classes to change their meaning. There are two (2) types ...
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Looping in Java
A loop statement allows the programmer to execute a statement or group of statements multiple number of times, based on ...
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5 Habits of a Security-Conscious Developer
Given the amount of security breaches that go on everyday, there is hardly any security-conscious developer (or any developer for ...
Read MoreWorking With Arrays in Java
Arrays refer to a sequential collection of elements of the same type. It is used to store a collection of ...
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Throw And Throws Exception in Java
Throw Throw is a keyword that is used in Java to declare an exception which is similar to the try/catch ...
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What are Relational Operators?
Unlike logical operators which connect two or more expressions, relational operators test and establish some type of relation between two ...
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Template Literals
Template literals allow for embedded expressions and help to solve the complex concatenation problem. They are enclosed by a back-tick ...
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Logical Operators
"Programs must be written for people to read, and only incidentally for machines to execute."— Harold Abelson, Structure and Interpretation of ...
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5 Network Scanning Tools
Network scanning is the process of identifying, analysing and fixing loopholes and vulnerabilities in a network to prevent a malicious ...
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Box shadows in CSS
The box shadow property in CSS is used to cast shadow on the frame of elements. It has the following ...
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Working With Functions
A function is a group of reusable code that can be called anywhere in your program. Functions eliminate the need ...
Read MoreBeginning With React Native
React Native is an open-source mobile application framework created and developed by Facebook, Inc. It is used to develop native ...
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Inheritance in Java
Inheritance in programming is the process whereby one class (also called a sub-class) acquires the properties (methods, fields, etc) of ...
Read MoreExceptions in Java
An exception is a problem that arises during the execution of a program. When an exception occurs, the normal flow ...
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Arithmetic Operators
Arithmetic operators are used in mathematical expressions much the same way they are used in algebra. Here's a list of ...
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What Are Cookies?
We've all been harassed with the following request: This website uses cookies ... Please accept to continue ... Oh yeah! ...
Read MoreArrow Functions
Arrow functions, also called "fat arrows" were introduced with ES6 as a new syntax for writing Javascript functions. By utilising ...
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Array Filter Method
The Array filter method is used to check against a given condition. Task: print out all multiples of 3 in ...
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Recursive Functions
A recursive function is one which defines a problem in terms of itself. A recursive function calls itself directly or ...
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Object Oriented Programming
Object oriented programming is a way of writing code such that different objects (instances) are created from a single object ...
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Human Attacks on Web Applications
Humans can use technologies in either harmful or helpful ways. And while, as a software developer, you are legally not ...
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What is ES6?
Also known as ECMAScript 6, ECMAScript 2015 or Javascript 6, ES6 is a version of Javascript that was introduced in ...
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What Are Recursive Functions?
A recursive function is one which defines a problem in terms of itself. A recursive function calls itself directly or ...
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Differences Between var, let and const.
Var Declaration Before the introduction of ES6 in 2015, var was the go-to way to declare variables in Javascript. Example: ...
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