Usage

const a = { a: 1, b: 2, c: 3 };
invert(a); // => { 1: 'a', 2: 'b', 3: 'c' }

Installation

CLI

npx atmx add helper invert

Manually

Copy and paste the following method into @/utils/helpers/invert.ts:

/**
* Returns a new object whose keys are the values of the given object
* and its values are the keys of the given object.
*
* @example
* const a = { a: 1, b: 2, c: 3 }
* invert(a) // => { 1: 'a', 2: 'b', 3: 'c' }
*/
export function invert<
TKey extends string | number | symbol,
TValue extends string | number | symbol,
>(obj: Record<TKey, TValue>): Record<TValue, TKey> {
if (!obj) {
return {} as Record<TValue, TKey>;
}

const keys = Object.keys(obj) as TKey[];

return keys.reduce(
(acc, key) => {
  acc[obj[key]] = key;
  return acc;
},
{} as Record<TValue, TKey>,
);
}