Javascript

In this tutorial, we’re going to be looking at the different ways to add leading zeros to a number in JavaScript. Sometimes, your program might require your numbers to have a set number of digits. Other times, you might be required to add a set number of leading zeros to fulfil a purpose. In those … Read more

In this tutorial, let’s learn all about different loops, how they occur, how to stop them once they occur, but also how to prevent them from occurring altogether. What are infinite loops? As the name implies, infinite loops are loops that run with no end. The most used loops are the ‘for’ and ‘while’ loops, … Read more

In this tutorial, we’re going to look at how to check if an array is empty in JavaScript. We’re going to start with the simplest method of using the ‘length’ property, but we’re not going to stop there. We’re also going to be looking at various other pre-defined array methods, including those that work alone … Read more

In this tutorial, we’ll be looking at the different ways to empty an array in JavaScript. We’ll look at manipulating the length, assigning empty arrays to the original array, using various other pre-defined array methods, and looping through the array. Set the array’s length to 0 One of the easiest ways to reset an array … Read more

In this tutorial, let’s look at the different ways of adding an item to the beginning of an array in JavaScript. We’re going to be looking at both mutable (operations that change the value of the original array) and immutable (operations that create a copy with the changed values, so the original array remains intact) … Read more

In this tutorial, we’re going to look at the different ways of capitalizing the first letter in JavaScript, so let’s get right into it then. Use String index and the substring method To start with, let’s use the string index and the substring method. As you know, strings start from an index of 0 that … Read more

In this tutorial, let’s look at the different ways of calling a JavaScript function from HTML. 1. We’re going to start off by creating an inline script tag right within our HTML page. This tag will host our function, and we’re going to call it by using the onClick method. 2. Then, let’s look at … Read more

In this tutorial, let’s look at the different ways of finding the factorial of a number in JavaScript. To start with, we’re going to look at the iterative approach, where we’ll be looking at using both the while and for loops. In the next section, let’s look at using recursive functions to achieve our purpose. … Read more

In this tutorial, let’s look at how to get the last element of an array in JavaScript. We’re going to start with the simplest method of extracting the last element by just accessing it using its index. Then, we’re going to move on to pre-defined methods like slice, splice, at and so on. Finally, let’s … Read more

In this tutorial, we’ll look at how to disable a button in JavaScript. We’ll be looking at 1. How to retrieve the button element in JavaScript, 2. Then 2 different ways to disable it from within your script file, 3. How to conditionally disable a button and finally, 4. How to toggle between enabled and … Read more