Sometimes, we want to initialize a multidimensional array with TypeScript.

In this article, we’ll look at how to initialize a multidimensional array with TypeScript.

How to initialize a multidimensional array with TypeScript?

To initialize a multidimensional array with TypeScript, we can use the array fill and map methods.

For instance, we write

const n = 10;
const palindrome: boolean[][] = new Array(n)
  .fill(false)
  .map(() => new Array(n).fill(false));

to create a 10×10 palindrome array that’s filled with false everywhere.

We do that by using Array with n to create an array with length 10.

And then we call fill to fill that with false.

Then we call map with a callback that map the entries in the array to arrays with 10 false entries.

Conclusion

To initialize a multidimensional array with TypeScript, we can use the array fill and map methods.