js去除重复元素

jquey

var uniqueArr = [];
$.each(focusVotes, function(i, el){
    if($.inArray(el, uniqueArr) === -1) uniqueArr.push(el);
});

js

var arr = [9, 9, 111, 2, 3, 4, 4, 5, 7];
var sortedArr = arr.sort(); 
var results = [];
for (var i = 0; i < arr.length - 1; i++) {
    if (sortedArr[i + 1] == sortedArr[i]) {
        results.push(sortedArr[i]);
    }
}

alert(results);