Finding items that appear only one time in a Javascript array

Question

I\'m trying to find the items that appear only one time in a Javascript array. In the following array:

[\'txfa2\',\'txfa9\',\'txfa2\',\'txfa1\',\'txfa3\',\'t         


        

Answer 1

/** 
 * Array.uniq();
 *
 * @author: Alexander Guiness
 * @param: {Array}
 * @return: {Array} An array of unique values
 * @licence: MIT
 * @use: Array.uniq([1,1,1,1,2,2,2,4,5,5,4]); //1,2,4,5
 * @date: Mon Jul 26 10:00:00 2011
*/

(function($) {
    'use strict';
    if(!$.uniq) {
        $.uniq = function(array) {
            if(Object.prototype.toString.call(array) !== '[object Array]')
                 return -1; 

            var i = array.length;
            array.sort();

            while(i--) {
                if(array[i] == array[i-1]) {
                    array.splice(i, 1);
                }
            }
            return array;
       }

    }
}(Array));

see the example

or use: jQuery.unique([]);