8 lines
219 B
JavaScript
8 lines
219 B
JavaScript
const invertKeyValues = (obj, fn) =>
|
|
Object.keys(obj).reduce((acc, key) => {
|
|
const val = fn ? fn(obj[key]) : obj[key];
|
|
acc[val] = acc[val] || [];
|
|
acc[val].push(key);
|
|
return acc;
|
|
}, {});
|
|
module.exports = invertKeyValues |