Find Duplicates

plain javascript

by hamzeen hameem

JavaScript

var arr = ['AUD', 'XSD', 'ZZZ', 'SGD','USD','AUD'];
var sorted_arr = arr.slice().sort();
for (var i = 0; i < arr.length - 1; i++) {
    if (sorted_arr[i + 1] == sorted_arr[i]) {
    	console.log('found: ' + sorted_arr[i] + i);
    	break;
    }
}