javascript - AngularJS:Ng-repeat in groups of n elements

Question

我有一组这样的数据:

$scope.items = [
    { model:"A", price: 100, quantity: 30}, 
    { model:"B", price: 90, quantity: 20 },
    { model:"C", price: 80, quantity: 200 }, 
    { model:"D", price: 70, quantity: 20 },
    { model:"E", price: 60, quantity: 100 }, 
    { model:"F", price: 50, quantity: 70 },
    { model:"G", price: 40, quantity: 230 }, 
    { model:"H", price: 30, quantity: 50 }
];

我想使用 ng-repeat，然后将 4 个一组，所以输出会是这样的

<ul>
    <li> model:"A", price: 100, quantity: 30</li>
    <li> model:"B", price: 90, quantity: 20</li>
    <li> model:"C", price: 80, quantity: 200</li>
    <li> model:"D", price: 70, quantity: 20</li>
</ul>
<ul>
    <li> model:"E", price: 60, quantity: 100</li>
    <li> model:"F", price: 50, quantity: 70</li>
    <li> model:"G", price: 40, quantity: 230</li>
    <li> model:"H", price: 30, quantity: 50</li>
</ul>

然后能够按价格和数量对其进行排序。我试过

<li ng-repeat="x in items.slice(0,4)">

但是我只能在每个组中进行排序。此外，我正在寻找一种适用于任何给定数量元素的解决方案。这个建议的解决方案 Group ng-repeat items仅当您事先知道您将拥有的元素数量时才工作。

PS:我尽量不使用分页指令，因为它会与其他脚本发生冲突。

提前致谢!

Answer 1

使用 lodash(_.sortBy 和 _.chunk)创建了一个示例，它不是最好的但总比没有好:

https://jsfiddle.net/1LLf7gz6/

您还可以通过删除来缩短:

$scope.itemssorted = _.sortBy($scope.items, 'price');

并添加:

$scope.itemschunk = _.chunk(_.sortBy($scope.items, 'price'), 4);

jsfiddle(新):https://jsfiddle.net/py5hs1yj/

带有排序按钮的 jsfiddle 示例:https://jsfiddle.net/Ldcpx35w/

文档:

._sortBy() -> https://lodash.com/docs#sortBy ._chunk() -> https://lodash.com/docs#chunk

jsfiddle代码:

脚本:

var app = angular.module('anExample', []);

app.controller('theController', ['$scope',function($scope){
    $scope.test = 'this is a test';

  $scope.items = [
    { model:"A", price: 100, quantity: 30}, 
    { model:"B", price: 90, quantity: 20 },
    { model:"C", price: 80, quantity: 200 }, 
    { model:"D", price: 70, quantity: 20 },
    { model:"E", price: 60, quantity: 100 }, 
    { model:"F", price: 50, quantity: 70 },
    { model:"G", price: 40, quantity: 230 }, 
    { model:"H", price: 30, quantity: 50 }
    ];

  //$scope.itemssorted = _.sortBy($scope.items, 'price');
  //example: reverse array
  //$scope.itemssorted = _.sortBy($scope.items, 'price').reverse();

  $scope.itemschunk = _.chunk(_.sortBy($scope.items, 'price'), 4);


  console.log("items: ", $scope.items);
  console.log("items chunked: ", $scope.itemschunk);
  //console.log("items sorted: ", $scope.itemssorted);

}]);

HTML:

<div ng-app="anExample" ng-controller="theController">

    Hello, {{test}}!
    <ul ng-repeat="group in itemschunk">
      <li ng-repeat="items in group"> Model: {{items.model}}, price: {{items.price}}, quantity: {{items.quantity}}</li>
    </ul>

</div>

结果:

Hello, this is a test!

Model: H, price: 30, quantity: 50
Model: G, price: 40, quantity: 230
Model: F, price: 50, quantity: 70
Model: E, price: 60, quantity: 100

Model: D, price: 70, quantity: 20
Model: C, price: 80, quantity: 200
Model: B, price: 90, quantity: 20
Model: A, price: 100, quantity: 30