在多维数组中按类别列出项目 - jquery

Question

我正在尝试按类别列出我的项目，所以我想展示的是这样的。

A 类

项目 1

第 2 项

B 类

项目 1

第 3 项

第 4 项

C 类

第 3 项

第 4 项

这是我拥有的数组，我应该如何打印我的类别并列出下面的项目？ $scope.categoryArray = [ {name:"Item 1", on: false, subcategory:"Category A"}, {name:"Item 2", on: false, subcategory:"Category A"}, {name:"Item 1", on:false, subcategory:"Category B"}, {name:"Item 3", on: false, subcategory:"Category B"}, {name:"Item 4", on: false, subcategory:"Category B"}, {name:"Item 3", on: false, subcategory:"Category C"}, {name:"Item 4", on: false, subcategory:"Category C"}];

提前感谢您的意见！

Answer 1

这样就可以了：

var app = angular.module("app", []);
app.controller("c", function($scope) {
  $scope.categoryArray = [{
    name: "Item 1",
    on: false,
    subcategory: "Category A"
  }, {
    name: "Item 2",
    on: false,
    subcategory: "Category A"
  }, {
    name: "Item 1",
    on: false,
    subcategory: "Category B"
  }, {
    name: "Item 3",
    on: false,
    subcategory: "Category B"
  }, {
    name: "Item 4",
    on: false,
    subcategory: "Category B"
  }, {
    name: "Item 3",
    on: false,
    subcategory: "Category C"
  }, {
    name: "Item 4",
    on: false,
    subcategory: "Category C"
  }];
  $scope.array = [];

  for (var item in $scope.categoryArray) {
    var obj = $scope.array[$scope.categoryArray[item].subcategory];
    if (!obj)
      $scope.array[$scope.categoryArray[item].subcategory] = [];
    $scope.array[$scope.categoryArray[item].subcategory].push($scope.categoryArray[item].name);

  }
  var str = "";
  for (var cat in $scope.array) {
    str += cat + "</br>";
    for (var item in $scope.array[cat]) {
      str += $scope.array[cat][item] + "</br>";
    }
  }
  $("#content").html(str);
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="app" ng-controller="c" id="content"></div>