Computing with tuple types in TypeScript

JavaScript’s Arrays are so flexible that TypeScript provides two different kinds of types for handling them:

Array types for arbitrary-length sequences of values that all have the same type – e.g.: Array<string>
Tuple types for fixed-length sequ…


This content originally appeared on 2ality – JavaScript and more and was authored by Dr. Axel Rauschmayer

JavaScript’s Arrays are so flexible that TypeScript provides two different kinds of types for handling them:

  • Array types for arbitrary-length sequences of values that all have the same type – e.g.: Array<string>
  • Tuple types for fixed-length sequences of values where each one may have a different type – e.g.: [number, string, boolean]

In this blog post, we look at the latter – especially how to compute with tuples at the type level.


This content originally appeared on 2ality – JavaScript and more and was authored by Dr. Axel Rauschmayer


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Dr. Axel Rauschmayer | Sciencx (2025-01-29T00:00:00+00:00) Computing with tuple types in TypeScript. Retrieved from https://www.scien.cx/2025/01/29/computing-with-tuple-types-in-typescript/

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