angularjs forEach和splice [英] angularjs forEach and splice

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本文介绍了angularjs forEach和splice的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我有这样一个数组:

$scope.emails = [
  {"key":"Work","value":"user@domine.com"},
  {"key":"","value":""},
   {"key":"Work","value":"user2@domine.com"}
  {"key":"","value":""}];

所以,我想删除空的电子邮件,但是角度 forEach 方法只删除一个对象为最后一个对象的原因???。

So, I want to remove empty emails but angular forEach method removing only one object that is last object why???.

js code

angular.forEach($scope.emails, function(email, index){
     if(email.value ===""){
       $scope.emails.splice(index, 1);

     } 

    });

我做错了

< a href =http://jsbin.com/waxenusa/3/> JS Bin

推荐答案

问题是你在循环期间从数组中删除元素,以便后面的项目处于不同的索引。你需要向后循环:

The problem is that you remove elements from the array during the loop so later items are at different indices. You need to loop backwards instead:

for (var i = $scope.emails.length - 1; i >= 0; i--) {
    if (!$scope.emails[i].value) {
        $scope.emails.splice(i, 1);
    }
}

这是更新示例

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