Tuple to Object

introduction#

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;
const result: TupleToObject<typeof tuple>; // expected { tesla: 'tesla', 'model 3': 'model 3', 'model X': 'model X', 'model Y': 'model Y'}

ts
const tuple = ['tesla', 'model 3', 'model X', 'model Y'] as const;
const result: TupleToObject<typeof tuple>; // expected { tesla: 'tesla', 'model 3': 'model 3', 'model X': 'model X', 'model Y': 'model Y'}

start point#

ts
/* _____________ Your Code Here _____________ */
type TupleToObject<T extends readonly any[]> = any;
 
/* _____________ Test Cases _____________ */
const tuple = ['tesla', 'model 3', 'model X', 'model Y'] as const;
 
type cases = [
  Expect<
    Equal<
Type 'false' does not satisfy the constraint 'true'.2344Type 'false' does not satisfy the constraint 'true'.      TupleToObject<typeof tuple>,
      { tesla: 'tesla'; 'model 3': 'model 3'; 'model X': 'model X'; 'model Y': 'model Y' }
    >
  >
];Try

ts
/* _____________ Your Code Here _____________ */
type TupleToObject<T extends readonly any[]> = any;
 
/* _____________ Test Cases _____________ */
const tuple = ['tesla', 'model 3', 'model X', 'model Y'] as const;
 
type cases = [
  Expect<
    Equal<
Type 'false' does not satisfy the constraint 'true'.2344Type 'false' does not satisfy the constraint 'true'.      TupleToObject<typeof tuple>,
      { tesla: 'tesla'; 'model 3': 'model 3'; 'model X': 'model X'; 'model Y': 'model Y' }
    >
  >
];Try

Take the Challenge

my solution#

Spoiler warning // Click to reveal answer

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

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

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