Table of Contents
- What is TypeScript?
- Array Types in TypeScript
- Basic Array Operations
- Using Tuple Types
What is TypeScript?
Array Types in TypeScript
In TypeScript, you can declare an array type by appending
 to the element type, or by using the generic
Array<ElementType> notation. Let’s take a look at two different ways to declare an array type:
Both methods are equivalent, and you can choose the one you find most readable or suitable for your specific use case.
Basic Array Operations
Here are some basic array operations in TypeScript, along with examples to illustrate their usage:
Iterating Over Elements
Using Tuple Types
TypeScript also provides a tuple type, which allows you to create an array with a fixed number of elements, each of a specific type. Tuples are useful when you need to represent a group of values with different types, such as a pair of a string and a number:
Note that once you’ve declared a tuple, you can’t add or remove elements, and you can’t change the type of the elements.
Arrays in TypeScript are versatile and easy to use, providing a powerful way to manage collections of values. By declaring array types, you can leverage TypeScript’s type-checking capabilities to catch potential bugs and improve your code’s maintainability. Remember to use the two different ways to declare an array type, basic array operations like adding, removing, accessing, and iterating over elements, and tuple types for fixed-length arrays with different types.
Additionally, the TypeScript Handbook provides an in-depth look at arrays and other everyday types in TypeScript. By familiarizing yourself with these concepts, you’ll be better equipped to write clean, efficient, and maintainable code using TypeScript. Happy coding!