Defining the range of an array of numbers in TypeScript: A complete guide

When working with Next.js, I created a function component where I utilized the useState hook to declare a variable for storing an array of digits. Here is an example:

const [digits, setDigits] = useState<number[]>();

I desire to define the range of the array generically, similar to Array(3) (not [number, number, number] as it is too lengthy). How can this be achieved?

Answer №1

If you want to create an array with a length of 100 containing numbers, you can use the following approach:

const data = new Array<number>(100)

This code snippet creates an array with a length of 100 where each element is of type number. Additionally, you can initialize all elements in the array to a specific number using the fill function like this:

const array = new Array<number>(100).fill(9)

With this code, you will have an array of length 100 where every index contains the number 9.

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