What's the best way (most efficient) to turn all the keys of an object to lower case?

Question

I\'ve come up with

function keysToLowerCase (obj) {
  var keys = Object.keys(obj);
  var n = keys.length;
  while (n--) {
    var key = keys[n]; // \"cache\"         


        

Answer 1

The loDash/fp way, quite nice as its essentially a one liner

import {
mapKeys
} from 'lodash/fp'

export function lowerCaseObjectKeys (value) {
return mapKeys(k => k.toLowerCase(), value)
}