JS 数组分类，相同的数据扎堆分类

function arrSort(arr) {
let newArr = [],
tempArr = [];
for (var i = 0; i < arr.length; i++) {
if (arr[i] == arr[i + 1]) {
tempArr.push(arr[i]);
} else {
tempArr.push(arr[i]);
newArr.push(tempArr.slice(0));
tempArr.length = 0;
}
}
return newArr
};

arrSort([1,1,2,2,3,3,1,1,3,3])