Array.sort(): front-end != back-end?

Question

JavaScript

Good afternoon.
Quite unexpectedly, I ran into a problem - sorting an array in a browser and a node.js server works differently. More precisely, everything is fine in the browser, but there is a problem on the backend.
Initial data:

var a = [{ distributor: 'igx4u_com', price: '24.99' },
{ distributor: 'online-gold*de', price: '18.35' },
{ distributor: 'gametrack', price: '35.95' },
{ distributor: 'de.gamecard.mobi', price: '16.75' },
{ distributor: 'playsmarty2008', price: '35.95' },
{ distributor: 'rpg-services', price: '26.9' },
{ distributor: 'keymbo*com', price: '16.85' },
{ distributor: 'de.gamecard.mobi', price: '24.99' },
{ distributor: 'online-gold*de', price: '16.85' },
{ distributor: 'keys4games_shop', price: '79.99' },
{ distributor: 'de.gamecard.mobi', price: '16.99' },
{ distributor: 'igx4u_com', price: '16.99' },
{ distributor: 'keymbo*com', price: '11.9' },
{ distributor: 'online-gold*de', price: '14.95' },
{ distributor: 'playsmarty2008', price: '26.85' },
{ distributor: 'rpg-services', price: '19.9' },
{ distributor: 'timegold_europe', price: '19.44' },
{ distributor: 'keymbo*com', price: '16.85' },
{ distributor: 'rpg-services', price: '18.9' },
{ distributor: 'www_g2a_com', price: '16.85' }
];

Function code:

function f(arr, field1, field2) {
    var mysort = function (field1, field2) {
        return function (x, y) {
            return (x[field1] == y[field1]) ? x[field2] > y[field2] : x[field1] > y[field1];
        }
    };
    return arr.sort(mysort(field1, field2));
}

That is, the function sorts an array of objects by two fields (in ascending order). Correct result:

Object { distributor="de.gamecard.mobi", price="16.75"}
Object { distributor="de.gamecard.mobi", price="16.99"}
Object { distributor="de.gamecard.mobi", price="24.99"}
Object { distributor="gametrack", price="35.95"}
Object { distributor="igx4u_com", price="16.99"}
Object { distributor="igx4u_com", price="24.99"}
Object { distributor="keymbo*com", price="11.9"}
Object { distributor="keymbo*com", price="16.85"}
Object { distributor="keymbo*com", price="16.85"}
Object { distributor="keys4games_shop", price="79.99"}
Object { distributor="online-gold*de", price="14.95"}
Object { distributor="online-gold*de", price="16.85"}
Object { distributor="online-gold*de", price="18.35"}
Object { distributor="playsmarty2008", price="26.85"}
Object { distributor="playsmarty2008", price="35.95"}
Object { distributor="rpg-services", price="18.9"}
Object { distributor="rpg-services", price="19.9"}
Object { distributor="rpg-services", price="26.9"}
Object { distributor="timegold_europe", price="19.44"}
Object { distributor="www_g2a_com", price="16.85"}

node.js result:

{ distributor: 'de.gamecard.mobi', price: '16.99' }
{ distributor: 'igx4u_com', price: '24.99' }
{ distributor: 'gametrack', price: '35.95' }
{ distributor: 'de.gamecard.mobi', price: '16.75' }
{ distributor: 'igx4u_com', price: '16.99' }
{ distributor: 'de.gamecard.mobi', price: '24.99' }
{ distributor: 'online-gold*de', price: '14.95' }
{ distributor: 'keymbo*com', price: '16.85' }
{ distributor: 'keys4games_shop', price: '79.99' }
{ distributor: 'online-gold*de', price: '16.85' }
{ distributor: 'playsmarty2008', price: '26.85' }
{ distributor: 'rpg-services', price: '18.9' }
{ distributor: 'timegold_europe', price: '19.44' }
{ distributor: 'www_g2a_com', price: '16.85' }

PS naming functions, variables, data, etc. - in this case, it doesn't matter, because this is a highly simplified example.
What's the matter?
Is it really necessary to write something of your own instead of the default .sort()?

Answer 1

It looks like you are not returning the sort result correctly. I assume that the browser swallows it, but the node does not.

Answer 2

And on what version of the node is this repeated? Something I don't remember sort removing duplicates somewhere.
This doesn't happen to me. Can you post the script you're running somewhere?