How to use TypeScript’s Type Utilities In Typescript
In this approach, we will use TypeScript’s type utilities to determine the length of a tuple. This method leverages TypeScript’s type system to compute the length at compile time, ensuring type safety and potentially improving performance by avoiding runtime calculations.
Syntax:
type Length<T extends readonly any[]> = T['length'];
Example: In this example we defines a Length type utility to extract the length of a tuple. It infers the length of the tuple tuple and prints it using tuple.length
type Length<T extends readonly any[]> = T['length'];
let tuple: [number, string, boolean] = [2009, "GFG", true];
type TupleLength = Length<typeof tuple>;
console.log("Tuple Length:", tuple.length);
Output:
Tuple Length: 3
Find the Length Tuple in TypeScript ?
In TypeScript, a Tuple is the data structure that allows storing a fixed number of elements of different types in a specific order. We can find the length of a tuple using various approaches that are implemented in this article in terms of examples.
There are several approaches available in TypeScript for finding the length of a tuple which are as follows:
Table of Content
- Using the length property
- Using a for…in loop
- Using the reduce method
- Using TypeScript’s Type Utilities
- Using recursion