Javascript

In this tutorial, let’s look at the different ways to filter an array in JavaScript using multiple conditions. To start with, let’s look at a what the ‘filter’ method is, and how it can be used to filter an array. Then, let’s start looking at the different ways of filtering an array by making it … Read more

In this tutorial, let’s look at how to count occurrences in a string in JavaScript. We’re going to first look at manually counting the occurrences using a loop, and then move on to methods that use pre-defined JavaScript functions. Manually count the occurrences using a ‘for’ loop If we were working with a character, a … Read more

In this tutorial, let’s look at how to remove an empty string from an array in JavaScript. As you know, an array is a collection of data, and this data can be homogenous (of one data type) or heterogenous (mixed data types). Let’s assume we have an array of strings, and among those strings, some … Read more

In this tutorial, let’s look at the different ways to remove a substring from a string in JavaScript. This substring could be a single character or more and can be present in any index. We’re going to create a function that receives the string and the substring you want removed. We’ll be looking at methods … Read more

In this tutorial, let’s look at the different ways to check if an array contains a value in JavaScript. We’ll be looking at several pre-defined methods, and then finish off the tutorial using loops to manually check if an array contains a value. Let’s get to it then! The includes() method The easiest way to … Read more

In this tutorial, let us look at how to swap array elements in JavaScript. We’ll start off by taking things easy, while moving on to using more pre-defined JavaScript methods as we dive deep into the topic. We’ll look at: 1. Using temporary variables to swap the array elements 2. Using the splice method 3. … Read more

In this article, let’s look at the different ways to find duplicates in an array in JavaScript. We’re going to be looking at different pre-defined JavaScript methods and finally some manual methods of finding the duplicates (usually using loops). We’ll be looking at: 1. Finding if an array contains duplicates. 2. Getting an array of … Read more

In this tutorial, let’s look at the different ways to concat two objects in JavaScript. We’re going to look at using both pre-defined and manual methods to merge our objects. Use the spread operator to merge objects Let’s say we have two objects, obj1 and obj2. With a string, you would have used concatenation to … Read more

In this tutorial, let’s look at how to remove quotes from a string in JavaScript. We’ll be looking at using methods that involve predefined string methods like replace, replaceAll, slice, substring, split and join to start with. Then finally, we’ll end the tutorial by looking at manually removing the quotes with loops. Using the replace … Read more

In this tutorial, let’s look at the different ways to return multiple values from a function in JavaScript. – Let’s first try to return multiple values with the traditional method (the return statement), and then move on to more complex methods that involve arrays, objects and destructuring. Trying the traditional way – using a return … Read more