Алфавитный массив javaScript
arr.sort(function(a, b) {
return a === b ? 0 : a < b ? -1 : 1;
});
Yawning Yacare
arr.sort(function(a, b) {
return a === b ? 0 : a < b ? -1 : 1;
});users.sort((a, b) => a.firstname.localeCompare(b.firstname))