Usage

const a = { a: 1, b: 2, c: 3 };
mapKeys(a, (key, value) => key + value); // => { a1: 1, b2: 2, c3: 3 }

Installation

CLI

npx atmx add helper map-keys

Manually

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

/**
* Map over all the keys of an object to return a new object.
*
* @example
* const a = { a: 1, b: 2, c: 3 }
* mapKeys(a, (key, value) => key + value) // => { a1: 1, b2: 2, c3: 3 }
*/
export function mapKeys<
TValue,
TKey extends string | number | symbol,
TNewKey extends string | number | symbol,
>(
obj: Record<TKey, TValue>,
mapFunc: (key: TKey, value: TValue) => TNewKey,
): Record<TNewKey, TValue> {
const keys = Object.keys(obj) as TKey[];
return keys.reduce(
(acc, key) => {
  acc[mapFunc(key as TKey, obj[key])] = obj[key];
  return acc;
},
{} as Record<TNewKey, TValue>,
);
}