Implement the type version of Array.unshift
For example:
type Result = Unshift<[1, 2], 0> // [0, 1, 2,]
/* _____________ Your Code Here _____________ */
type Unshift<T extends unknown[], U> = [
U,
...T
]
/* _____________ Test Cases _____________ */
import type { Equal, Expect } from '@type-challenges/utils'
type cases = [
Expect<Equal<Unshift<[], 1>, [1]>>,
Expect<Equal<Unshift<[1, 2], 0>, [0, 1, 2]>>,
Expect<Equal<Unshift<['1', 2, '3'], boolean>, [boolean, '1', 2, '3']>>,
]标签：13,Typescript,_____________,Unshift,Expect,Easy,type From： https://www.cnblogs.com/Answer1215/p/16653990.html