Comments (4)
Use composed tuple of two elements for a single type pattern matching with extends keyword.
type Zip<T extends unknown[], U extends unknown[]> = [T, U] extends [[infer T1, ...infer R1], [infer U1, ...infer R2]] ? [[T1, U1], ...Zip<R1, R2>] : []
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Followed @marked42 approach and optimized it to use tail recursion
type Zip<
T extends unknown[],
U extends unknown[],
Acc extends [unknown, unknown][] = []
> = [T, U] extends [
[infer HeadT, ...infer TailT],
[infer HeadU, ...infer TailU]
]
? Zip<TailT, TailU, [...Acc, [HeadT, HeadU]]>
: Acc;
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@marked42 sweet, I didn't think about compound here, thanks for the solution!
from type-challenges-solutions.
The compound solution is really smart! @marked42
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