Convert Object Keys In JavaScript

convert_object_keys.js

const convertObjectKeys = (obj, convertFn) => {
	let result = {};
	for (const key in obj){
		result[convertFn(key)] = obj[key];
	}
	return result;
}

const upperCase = str => str.toUpperCase();

var obj ={a: 100};
convertKey(obj, upperCase);
// {A: 100}