我有一个非常简单的数组,它有重复的值。我的阵列是这样的:
$scope.type= ["Bar", "Pie", "Line", "Line", "Line", "Line", "Line", "Line", "map", "Line", "Bar", "Pie", "Pie", "Pie", "Pie", "Pie", "Pie", "Pie"]
在我的重复中,我有这个条件
ng-repeat = types in type track by $index
如何在ng-repeat中仅显示数组中的唯一值?
答案 0 :(得分:6)
使用unique
时,您可以使用ng-repeat
过滤器。
ng-repeat="type in types|unique: type"
var app = angular.module('myApp',['ui.directives', 'ui.filters']);
app.controller("myCtrl", function($scope) {
$scope.types = ["Bar", "Pie", "Line", "Line", "Line", "Line", "Line", "Line", "map", "Line", "Bar", "Pie", "Pie", "Pie", "Pie", "Pie", "Pie", "Pie"];
});

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular-ui/0.4.0/angular-ui.min.js"></script>
<body ng-app="myApp" ng-controller="myCtrl">
<div ng-repeat="type in types|unique: type">{{type}}</div>
</body>
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答案 1 :(得分:1)
如果您不想包含Lodash,可以这样做:
$scope.typeUnique = Object.keys($scope.type.reduce((acc, val) => { acc[val] = true; return acc; }, {}));
答案 2 :(得分:0)
使用lodash将数组转换为unque元素数组
$scope.type = _.uniq($scope.type);
要使用loadsh,您需要将cdn用于lodash
<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.5/lodash.min.js"></script>
答案 3 :(得分:0)
试试这个循环:
$scope.type= ["Bar", "Pie", "Line", "Line", "Line", "Line", "Line", "Line", "map", "Line", "Bar", "Pie", "Pie", "Pie", "Pie", "Pie", "Pie", "Pie"];
var output = [];
angular.forEach($scope.type, function(type, index) {
// if it's not already part of our keys array
if(output.indexOf(type) === -1) {
// push this item to our final output array
output.push(item);
}
});
答案 4 :(得分:0)
要获得预期结果,请先进行排序,然后使用ng-if
进行过滤 <ul>
<li ng-repeat="x in sortedType = (type | orderBy) track by $index" ng-if="sortedType[$index -1] != x">
{{ x }}
</li>
</ul>
代码示例 - https://codepen.io/nagasai/pen/bvVMvV
var app = angular.module('myApp', []);
app.controller('personCtrl', function($scope) {
$scope.type= ["Bar", "Pie", "Line", "Line", "Line", "Line", "Line", "Line", "map", "Line", "Bar", "Pie", "Pie", "Pie", "Pie", "Pie", "Pie", "Pie"]
});
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<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.4/angular.min.js"></script>
<body>
<div ng-app="myApp" ng-controller="personCtrl">
<ul>
<li ng-repeat="x in sortedType = (type | orderBy) track by $index" ng-if="sortedType[$index -1] != x">
{{ x }}
</li>
</ul>
</div>
</body>
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