type RecordOf<
  TupleType extends Array<object> | ReadonlyArray<object>,
  KeyProperty extends keyof TupleType[number]
> = {
  [Item in TupleType[number] as `${Item[KeyProperty]}`]: Item;
};

function toRecord<
  TupleType extends Array<object> | ReadonlyArray<object>,
  KeyProperty extends keyof TupleType[number]
>(
  tuple: TupleType,
  keyProperty: KeyProperty
): RecordOf<TupleType, KeyProperty> {
  return Object.fromEntries(
    tuple.map((item: TupleType[number]) => [String(item[keyProperty]), item])
  ) as RecordOf<TupleType, KeyProperty>;
}

const animalList = [
  { name: 'Shadow', species: 'dog', breed: 'Golden Retriever' },
  { name: 'Chance', species: 'dog', breed: 'Bulldog' },
  { name: 'Sassy', species: 'cat', breed: 'Siamese' },
  { name: 'Jake the Dog', species: 'dog', breed: 'Bulldog', isMagical: true },
] as const;

const animals = toRecord(animalList, 'name');

console.log(animals.Shadow);
console.log(animals['Jake the Dog'].isMagical);