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459 - Flatten #31332

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SazonovV opened this issue Dec 24, 2023 · 0 comments

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SazonovV commented Dec 24, 2023

type Flatten<T> = T extends [] 
? [] 
: T extends [infer First, ...infer Rest] 
  ? First extends unknown[] 
    ? [...Flatten<First>, ...Flatten<Rest>]
    : [First, ...Flatten<Rest>] 
  : T

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