Types when destructuring arrays

Question

function f([a,b,c]) {
  // this works but a,b and c are any
}

it\'s possible write something like that?

function f([a: number,b: nu         


        

Answer 1

Yes, it is. In TypeScript, you do it with types of array in a simple way, creating tuples.

type StringKeyValuePair = [string, string];

You can do what you want by naming the array:

function f(xs: [number, number, number]) {}

But you wouldn't name the interal parameter. Another possibility is use destructuring by pairs:

function f([a,b,c]: [number, number, number]) {}