Angular.js.如何计算满足自定义过滤器的 ng-repeat 迭代 [英] Angular.js. How to count ng-repeat iterations which satisfy the custom filter

问题描述

这是我的代码:

过滤器:

Kb.filter("notEmpty", function(){返回函数(输入){无功输出=[];for(var i=0;i

我需要根据循环中过滤项目的数量显示/隐藏重复的 s.最好的方法是什么?

谢谢

解决方案

ng-repeat 表达式允许将过滤后的结果分配给变量.此变量可从当前范围访问，因此您可以在同一范围内以任何方式使用它:

<p>过滤项目数:{{filteredItems.length}}</p>

Here's my code:

<div ng-show="?" ng-repeat="item in items | notEmpty">
</div>

Filter:

Kb.filter("notEmpty", function(){ 
  return function(input){
    var output=[];
    for(var i=0;i<input.length;i++){
      if(input[i]){
        output.push(input[i]);
      }
    }
    return output;
}});

I need to show/hide repeated s according the quantity of filtered items in the loop. What is the best way to do it?

Thanks

解决方案

ng-repeat expression allows filtered results to be assigned to a variable. This variable will be accessible from current scope so you can use it in same scope anyway you want:

<p>Number of filtered items: {{filteredItems.length}}</p>

<div 
  ng-show="filteredItems.length > 0" 
  ng-repeat="item in filteredItems = (items | notEmpty)"
>
 {{$index}}
</div>

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