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type Combination<T extends string[], U = T[number], UU = U> =
  U extends string
  ? U | `${U} ${Combination<[], Exclude<UU, U>>}`
  : never
提出日時2025-01-22 10:46:29
問題Combination
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<Combination<['foo', 'bar', 'baz']>,
  'foo' | 'bar' | 'baz' | 'foo bar' | 'foo bar baz' | 'foo baz' | 'foo baz bar' | 'bar foo' | 'bar foo baz' | 'bar baz' | 'bar baz foo' | 'baz foo' | 'baz foo bar' | 'baz bar' | 'baz bar foo'>>,
]