//数组去重且从小到大排序
newArr(arr) {
//去重
arr = Array.from(new Set(arr)).map(item => {
return Number(item)
});
let min;
for (var i = 0; i < arr.length; i++) {
for (var j = i; j < arr.length; j++) {
if (arr[i] > arr[j]) {
min = arr[j];
arr[j] = arr[i];
arr[i] = min;
}
}
}
return arr;
}