TypeScript — Tuples

Basic tuple

let person: [string, number] = ['Alice', 25];

Accessing elements

let person: [string, number] = ['Alice', 25];
console.log(person[0]); // string
console.log(person[1]); // number

Optional elements

let record: [string, number, boolean?] = ['Alice', 25];

Rest elements

let rest: [string, ...number[]] = ['Alice', 1, 2, 3];

Readonly tuples

let readonlyTuple: readonly [string, number] = ['Alice', 25];

Named tuples

type Person = [name: string, age: number];
let person: Person = ['Alice', 25];

Mini Practice

1. Create tuples
2. Access elements
3. Use optional elements
4. Create readonly tuples

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