angular.js - angular 中怎么在 repeat 的 item 中新建变量呢？

Question

1.数据中只有x和y，我想在新建一个变量 item.x_y

<p ng-repeat="item in items">
  <span> {{item.x}} </span>
  <span> {{item.y}} </span>
  <span> {{item.x_y}} </span>
</p>

2.我还在在repeat中，自定义一个函数可行吗？item.function 只对这个item的数据操作

Answer 1

I usually traverse the items，给每一项加x_yattributes.
The performance is so poor, others must have a better way.

Answer 2

Why not add attributes on the server side? Don’t put too much pressure on the front end. If this attribute is only for front-end display, it can be operated without adding the attribute. {{You can write your operation logic for xy here, try not to add attributes here}}. For example, if you want to add a new value of x-y, you can write it like this:
{{item.x - item.y}}

Answer 3

Add attributes to controller