Question

我编写了一个代码来计算网站上的内容年龄。它效率低下，而且计算方法也很偏僻。我以前写过这个剧本，上次它完美地工作了，但是我找不到它该死的文件。

我认为计算问题是由年引起的。任何人都可以建议我修复？创建日期格式为YYYYMMDD，输出为整周（这很重要），即下面的示例应输出'52'周。

var created='20120223';
var year=Number(created.substr(0,4));
var month=Number(created.substr(4,2))-1;
var day=Number(created.substr(6,2));
var d = new Date();
var curr_date = d.getDate();
var curr_month = d.getMonth() + 1;
var curr_year = d.getFullYear();
var input_age = ((((curr_year - year)*31536000) + ((curr_month - month)*2678400) + ((curr_date - day)*86400))/604800).toFixed(0);
document.getElementById('item12345_input').value = input_age + ' weeks';

Answer 1

你先减一个月。然后你再添加一个月。试试这个

    var created='20120223';
var year=Number(created.substr(0,4));
var month=Number(created.substr(4,2))-1;
var day=Number(created.substr(6,2));
var d = new Date();
var curr_date = d.getDate();
var curr_month = d.getMonth();
var curr_year = d.getFullYear();
var input_age = ((((curr_year - year)*31536000) + ((curr_month - month)*2678400) + ((curr_date - day)*86400))/604800).toFixed(0);
alert(input_age + ' weeks');

Answer 2

只需减去2个日期。

var createdDate = new Date(
    +created.substring(0, 4),  // Four digit year
    created.substring(4, 6)-1, // Base-zero month
    +created.substring(6, 8)); // Day of month
var ageMillis = (new Date) - createdDate;
var MS_PER_WEEK = 1000/* ms /sec */
                * 60  /* sec/min */
                * 60  /* min/hr  */
                * 24  /* hr /day */
                * 7   /* day/wk  */;
var ageWeeks = ageMillis / MS_PER_WEEK;

Answer 3

注意月份为0

<script>
var created ="20120223";
var yyyy  = +created.substring(0, 4);
var mm    = created.substring(4, 6)-1;
var dd    = +created.substring(6, 8);
var createdDate = new Date(yyyy,mm,dd);
var ageMillis = new Date().getTime() - createdDate.getTime();
var MS_PER_WEEK = 1000/* ms /sec */
                * 60  /* sec/min */
                * 60  /* min/hr  */
                * 24  /* hr /day */
                * 7   /* day/wk  */;
var ageWeeks = parseInt(ageMillis / MS_PER_WEEK);

alert("Created on " +mm+"/"+dd+"/"+yyyy+" which is "+ageWeeks+ " week"+(ageWeeks==1?"":"s")+" ago");

</script>

Answer 4

你可以试试这个：

    var created='20120223';
    var year=Number(created.substr(0,4));
    var month = Number(created.substr(4,2));
    if (Number(created.substr(4,2)) < 10){
      month = '0'+ Number(created.substr(4,2));
    }
    var day=Number(created.substr(6,2));
    var dt = year+'-'+month+'-'+day;
    var dif = new Date().getTime() - Date.parse(dt);
    var divWeek = 7 * 24 * 60 * 60 * 1000;
    alert(Math.round(dif/divWeek));

有没有更好的方法来计算内容的年龄

4 个答案: