Question

我有一个数组对象：

var checkin_status = [
{"startdate":"2015-01-08",
"totaldays":"3",
"roadmap":[
        {"gifttype":"stars","quantity":100,"day":1},
        {"gifttype":"stars","quantity":500,"day":3},
        {"gifttype":"stars","quantity":1000,"day":10},
        {"gifttype":"stars","quantity":1200,"day":20}
      ]

}];

我使用$.each显示它们进行查看，现在我如何查看roadmap中的最后一个对象？因为我必须为最后一个对象提供一些条件。有什么建议吗？谢谢

Answer 1

//assuming that you already have a better logic to select the roadmap from the checkin_status object
//assign the current roadmap object to a local var before you iterate through it
var roadmap = checkin_status[0].roadmap;
$.each(roadmap, function (index, item) {
   //'item' is the object of the current iteration..
   if (index === roadmap.length - 1) {
      //do something special with the last item
   }
});

length - 1的原因是因为，Javascript中的数组被索引为0。例如，如果您有4个项目，那么最后一个项目是索引3.

如何检查最后一个数组对象

1 个答案: