自己写的数组排重+排序

var a = [11,2,3,4,5,7,8,4,33,2,6];

Array.prototype.sorts = function(){
    var $this = this, i=1,
        arrays = $this.sort(function(a,b){return (a-b)>0}),
        len = arrays.length;
    
    if(len<2) return arrays;
    while(i < len){
        if(arrays[i] == arrays[i-1]){
            len--;
            arrays.splice(i,1);
        }else{
            i++;
        }
    }
    return arrays;
}

a.sorts();