Check out all our TypeScript tutorials.
To find the length of an array in TypeScript, read its length property: arr.length returns the number of elements as a number, and an empty array gives 0. There’s no size() or count() method on arrays: I ran every snippet with TypeScript 7.0.2 and Node.js v22.22.2 in strict mode, so the output you see is … Read more >>
To remove an item from an array in TypeScript, use filter() when you want a new array without the value, and splice(index, 1) when you want to remove it from the array you already have. shift() drops the first element, pop() drops the last, and delete should be avoided because it leaves an empty slot … Read more >>
One of my team members recently asked about getting the last element of an array in TypeScript. I suggested a few methods. In this tutorial, I will explain how to get the last element of an array in TypeScript with some real examples. Get the Last Element of an Array in TypeScript Arrays in TypeScript … Read more >>
Recently, I got a situation where I needed to access the first item in a TypeScript array. TypeScript provides several ways to accomplish this. In this tutorial, I will explain how to get the first element of an array in TypeScript using different methods with examples. Let me show you each method with examples. 1. … Read more >>
In this tutorial, I will explain how to check if an array is not empty in TypeScript. When processing JSON responses or working with arrays in TypeScript, it’s important to know how to safely check if a variable is an array and is not empty. Let me explain the details with some real-world examples. You … Read more >>
While working with TypeScript programming, you will get requirements to check if a TypeScript array is empty. In this tutorial, I will explain various ways to check if an array is empty in TypeScript with detailed examples. Let me show you all the methods with examples. Here are various methods to check if an array … Read more >>
In this tutorial, I will explain how to declare and initialize empty arrays in TypeScript. As a developer working on a project for a US-based company, I recently faced a challenge where I needed to create an empty array to store a list of employees. After researching and experimenting with different approaches, I discovered the … Read more >>
In this tutorial, I will explain how to create and use an empty string array in TypeScript with some examples. I will show you various methods to declare and manipulate string arrays, ensuring you can handle them efficiently in your TypeScript projects. What is an Empty String Array in TypeScript? An empty string array in … Read more >>
To iterate over an array in TypeScript, use for…of when you only need the values, a classic for loop or entries() when you need the index, and forEach() when a callback reads better. All three keep full type safety: the loop variable gets the array’s element type, so string[] gives you a string. This guide … Read more >>
To add elements to an array in TypeScript, call push() to append to the end, unshift() to add to the beginning, or splice(index, 0, value) to insert at a position in the middle. Those three change the array you already have. If you need a new array instead and want the original left alone, use … Read more >>