Question

当您在出生日期输入一个数字月份时，我需要帮助，该月份将自动在输入中的单个数字中添加0位数。这是我的代码：

public static void findSum (int[] arr) {
    int i = 0;


    while (i < arr.length-1) {
        //define resu and j on the inside as these change with every i
        //start j from the i+1
        int j = i+1;
        //define resu as the ith element
        int resu = arr[i];
        //keep adding to resu until we have reached end of array or until resu is greater than the target  
        while (j < arr.length-1 && resu < 14){
            //add the jth element of the array
            resu = resu + arr[j]; 
            //print if we have a match
            if (resu == 13){    
                System.out.println("interval " + i + " and " + j + " is 13");

            }
            j++;
        }
            i++;
    }
}

Answer 1

您已指定要检查$('#dob_dd')的长度。也许它应该是：

if (addzero != 2)

当然，您需要使用例如$('#dob_dd').val("new value")

更新值

Answer 2

如果要更新显示的值。它就像

一样简单

$('#dob_dd').blur(function(){
    var $this = $(this);
    $this.value(('0' + $this.value()).substr(-2));
});

如果选择器也选择了多个目标，这将正常运行

在输入中添加0之前的数字

2 个答案: