Types when destructuring arrays

This is the proper syntax for destructuring an array inside an argument list:

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

arrays types typescript destructuring

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]) {}

arrays types typescript destructuring

With TypeScript 4.0, tuple types can now provide labels

type Range = [start: number, end: number]

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