ustal, czy tablica ma duplikaty lodash
function hasDuplicates(a) {
return _.uniq(a).length !== a.length;
}
var a = [1,2,1,3,4,5];
var b = [1,2,3,4,5,6];
document.write(hasDuplicates(a), ',',hasDuplicates(b));
Embarrassed Echidna