Getting key with the highest value from object

Question

I have a object like that one:

Object {a: 1, b: 2, undefined: 1} 

How can I quickly pull the largest value identifier (here: b

Answer 1

Here is a suggestion in case you have many equal values and not only one maximum:

    const getMax = object => {
        return Object.keys(object).filter(x => {
             return object[x] == Math.max.apply(null, 
             Object.values(object));
       });
    };

This returns an array, with the keys for all of them with the maximum value, in case there are some that have equal values. For example: if

const obj = {apples: 1, bananas: 1, pears: 1 }
//This will return ['apples', 'bananas', 'pears']

If on the other hand there is a maximum:

const obj = {apples: 1, bananas: 2, pears: 1 }; //This will return ['bananas']
---> To get the string out of the array: ['bananas'][0] //returns 'bananas'`