我有以下列表:
Html代码:
var toyProblem = function () {
var sol_str='';
var operators = ['+','-','*','/'];
for(var i in operators){
var prev_operator=(i-1);
if(sol_str!=''){sol_str+=operators[prev_operator];}
sol_str +=arguments[i];
}
console.log(sol_str);
return eval(sol_str);
}
console.log(toyProblem(6, 0, 10, 3));
控制器代码:
<div ng-repeat="alerta in alertas">
<div class="aa" style=" margin-top: 1px;width: 100%; height: 52px;border-bottom: solid 1px #d4d4d4;">
<div class="float-left" style="width: 80%;">
<a href="#" class="item item-icon-left" >
<i class="icon ion-alert"></i>
{{alerta.desc}}
</a>
</div>
<div class="float-left divdeletea">
<span ng-click="deleteAlert($index)"><img class="imgDelete" src="img/remove-icon.png"></span>
</div>
</div>
</div>
答案 0 :(得分:1)
delete
关键字用于从对象中删除属性。所以假设你有一个对象:
let object = {name: 'Pete'};
delete object.name; // {}
你留下一个空物体。我从未想过将它与数组一起使用,但是我假设它用undefined
或类似的东西替换元素,这仍然是一个有效的数组元素。
无论如何,从数组中删除元素的正确方法是使用splice()
方法,它采用两个参数,索引和要删除的元素数量。所以:
$scope.alertas.splice(index, 1);
答案 1 :(得分:0)
尝试splice
从数组中删除项目:
$scope.deleteAlert= function(i){
$scope.alertas.splice(i, 1);
}
答案 2 :(得分:0)
以下是一个可以帮助您的示例:
var app = angular.module("myApp", []);
app.controller("myCtrl", function($scope) {
$scope.alertas = [{desc:"test1"},{desc:"test2"},{desc:"test3"}];
$scope.addItem = function (val) {
$scope.alertas.push({desc:$scope.addMe});
}
$scope.removeItem = function (x) {
$scope.alertas.splice(x, 1);
}
});
&#13;
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.4/angular.min.js"></script>
<div ng-app="myApp" ng-controller="myCtrl">
{{alertas}}
<ul>
<li ng-repeat="alerta in alertas">{{alerta.desc}} <span ng-click="removeItem($index)">×</span></li>
</ul>
<input ng-model="addMe">
<button ng-click="addItem()">Add</button>
</div>
&#13;