00011-easy-tuple-to-object.ts

/*
  11 - Tuple to Object
  -------
  by sinoon (@sinoon) #easy 
  
  ### Question
  
  Give an array, transform into an object type and the key/value must in the given array.
  
  For example
  
  ```ts
  const tuple = ['tesla', 'model 3', 'model X', 'model Y'] as const
  
  type result = TupleToObject<typeof tuple> // expected { tesla: 'tesla', 'model 3': 'model 3', 'model X': 'model X', 'model Y': 'model Y'}
  ```
  
  > View on GitHub: https://tsch.js.org/11
*/

/* _____________ Your Code Here _____________ */


type TupleToObject<T extends readonly any[]> = {
    [key in T[number]]: key 
};

/* _____________ Test Cases _____________ */
import type { Equal, Expect } from "@type-challenges/utils";

const tuple = ["tesla", "model 3", "model X", "model Y"] as const;
const tupleNumber = [1, 2, 3, 4] as const;
const tupleMix = [1, "2", 3, "4"] 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 tupleMix>, { 1: 1; "2": "2"; 3: 3; "4": "4" }>
  >
];

type error = TupleToObject<[[1, 2], {}]>;

/* _____________ Further Steps _____________ */
/*
  > Share your solutions: https://tsch.js.org/11/answer
  > View solutions: https://tsch.js.org/11/solutions
  > More Challenges: https://tsch.js.org
*/