Question

我这里有这个小代码。

var fleet = [];
var number

var Taxi = function(color, badgeNumber) {
    this.color = "Yellow";
    this.badgeNumber = number;
}
for(var i = 0; i < 5; i++) {
    fleet[i] = new Taxi;
    number = i;
}
for(var i = 0; i < fleet.length; i++) {
    print("Taxi with badge number " + fleet[i].badgeNumber + " is " + fleet[i].color);
}

返回：

Taxi with badge number 4 is Yellow
Taxi with badge number 0 is Yellow
Taxi with badge number 1 is Yellow
Taxi with badge number 2 is Yellow
Taxi with badge number 3 is Yellow

我打算这样做，这个数字会按升序打印出来。显然它应该从0开始。我喜欢尽可能简单，所以问题是我猜为什么不按正确的顺序打印它？

提前谢谢！

Answer 1

在for循环中打印之前，请使用以下代码对数组进行排序：

fleet.sort(function(a,b){return a.badgeNumber - b.badgeNumber})

Answer 2

您需要在分配数组之前指定编号。在设置车队后分配编号时，您将获取不是最新的编号并将其分配给徽章编号。执行此操作后，您无需对数组进行排序。

for (var i=0; i < 5; i++)
{
    number = i;
    fleet[i] = new Taxi;
}

Answer 3

没有必要再制作另一个for循环。只需编辑你需要的循环，并解决问题。

for(var i = 0; i < 5; i++) {
    fleet[i] = new Taxi;
    number = i;
    print("Taxi with badge number " + fleet[i].badgeNumber + " is " + fleet[i].color);
}

这将始终按顺序打印。

Answer 4

<html>
<head>
<script>
var fleet = [];
 var number;

  var Taxi = function(color,badgeNumber)
  {
   this.color="Yellow";
   this.badgeNumber=number;
   }
  for (var i=0; i < 5; i++)
   {
  number = i;     
  fleet[i] = new Taxi;

   }
 for(var i = 0; i< fleet.length; i++)
  {
 alert("Taxi with badge number " + fleet[i].badgeNumber + " is " + fleet[i].color);
  }
</script>   
 </head>

  </html>

简单的循环Javascript

4 个答案: