选择这个：

var uniqueArray = duplicateArray.filter(function(elem, pos) {
    return duplicateArray.indexOf(elem) == pos;
}); 

现在uniqueArray不包含重复项。

function removeDuplicates(inputArray) {
            var outputArray=new Array();

            if(inputArray.length>0){
                jQuery.each(inputArray, function(index, value) {
                    if(jQuery.inArray(value, outputArray) == -1){
                        outputArray.push(value);
                    }
                });
            }           
            return outputArray;
        }

使用jQuery快速而肮脏：

var names = ["Mike","Matt","Nancy","Adam","Jenny","Nancy","Carl"];
var uniqueNames = [];
$.each(names, function(i, el){
    if($.inArray(el, uniqueNames) === -1) uniqueNames.push(el);
});

对于希望将具有重复元素的阵列展平为一个唯一阵列的任何人：

function flattenUniq(arrays) {
  var args = Array.prototype.slice.call(arguments);

  var array = [].concat.apply([], args)

  var result = array.reduce(function(prev, curr){
    if (prev.indexOf(curr) < 0) prev.push(curr);
    return prev;
  },[]);

  return result;
}

因此，选项如下：

let a = [11,22,11,22];
let b = []


b = [ ...new Set(a) ];     
// b = [11, 22]

b = Array.from( new Set(a))   
// b = [11, 22]

b = a.filter((val,i)=>{
  return a.indexOf(val)==i
})                        
// b = [11, 22]

这里非常简单，可以在任何地方（甚至在PhotoshopScript中）理解和工作代码。检查一下！

var peoplenames = new Array("Mike","Matt","Nancy","Adam","Jenny","Nancy","Carl");

peoplenames = unique(peoplenames);
alert(peoplenames);

function unique(array){
    var len = array.length;
    for(var i = 0; i < len; i++) for(var j = i + 1; j < len; j++) 
        if(array[j] == array[i]){
            array.splice(j,1);
            j--;
            len--;
        }
    return array;
}

//*result* peoplenames == ["Mike","Matt","Nancy","Adam","Jenny","Carl"]