How to sort an array of objects by multiple fields?

Question

From this original question, how would I apply a sort on multiple fields?

Using this slightly adapted structure, how would I sort city (ascending) & then price (

Answer 1

Here's an extensible way to sort by multiple fields.

homes.sort(function(left, right) {
    var city_order = left.city.localeCompare(right.city);
    var price_order = parseInt(left.price) - parseInt(right.price);
    return city_order || -price_order;
});

Notes

• a.localeCompare(b) is universally supported and returns -1,0,1 if a,a==b,a>b respectively.
• Subtraction works on numeric fields.
• || in the last line gives city priority over price.
• Negate to reverse order in any field, as in -price_order
• Date comparison, var date_order = new Date(left.date) - new Date(right.date); works like numerics because date math turns into milliseconds since 1970.
• Add fields into the or-chain, return city_order || -price_order || date_order;