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11. 元组转换为对象 ​

11. 元组转换为对象

代码 ​

typescript
// 11. 元组转换为对象：https://tsch.js.org/11/zh-CN
import type { Equal, Expect } from '@type-challenges/utils'

// 你的代码
type TupleToObject<T extends readonly PropertyKey[]> = {
  [K in T[number]]: K
}

// 测试用例
const tuple = ['tesla', 'model 3', 'model X', 'model Y'] as const
const tupleNumber = [1, 2, 3, 4] as const
const sym1 = Symbol(1)
const sym2 = Symbol(2)
const tupleSymbol = [sym1, sym2] as const
const tupleMix = [1, '2', 3, '4', sym1] as const

type cases = [
  Expect<Equal<TupleToObject<typeof tuple>, { 'tesla': 'tesla', 'model 3': 'model 3', 'model X': 'model X', 'model Y': 'model Y' }>>,
  Expect<Equal<TupleToObject<typeof tupleNumber>, { 1: 1, 2: 2, 3: 3, 4: 4 }>>,
  Expect<Equal<TupleToObject<typeof tupleSymbol>, { [sym1]: typeof sym1, [sym2]: typeof sym2 }>>,
  Expect<Equal<TupleToObject<typeof tupleMix>, { 1: 1, '2': '2', 3: 3, '4': '4', [sym1]: typeof sym1 }>>,
]

// @ts-expect-error
type error = TupleToObject<[[1, 2], {}]>