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# AI solution for TypeScript puzzle on BFE.dev

26. implement ReverseTuple<T>

Solution:

`type ReverseTuple<T extends any[]> = T extends [infer H, ...infer R] ? [...ReverseTuple<R>, H] : [];`

Explanation:

`T extends any[]`

ensures that T is a tuple type`T extends [infer H, ...infer R]`

deconstructs the tuple into its first element H and the remaining elements R`infer`

allows the type inference of H and R`infer R`

results in a tuple type for R`?`

starts the ternary operator`...ReverseTuple<R>`

recursively calls`ReverseTuple`

on R and spreads the reversed tuple`, H`

appends the first element H to the end`: []`

returns an empty array if T is an empty tuple.