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Tuple to Nested Object

提出詳細

type TupleToNestedObject<T extends unknown[], U> =
  T extends [infer F extends PropertyKey, ...infer R]
  ? R["length"] extends 0
  ? { [P in F]: U }
  : { [P in F]: TupleToNestedObject<R, U> }
  : U
提出日時2023-08-31 10:31:23
問題Tuple to Nested Object
ユーザーookkoouu
ステータスAccepted
テストケース
import type { Equal, Expect } from '@type-challenges/utils'

type cases = [
  Expect<Equal<TupleToNestedObject<['a'], string>, { a: string }>>,
  Expect<Equal<TupleToNestedObject<['a', 'b'], number>, { a: { b: number } }>>,
  Expect<Equal<TupleToNestedObject<['a', 'b', 'c'], boolean>, { a: { b: { c: boolean } } }>>,
  Expect<Equal<TupleToNestedObject<[], boolean>, boolean>>,
]