Underscore.js`filter`不起作用

Question

我有以下代码片段，用于从用户选择的列表中选择哪个郊区（省略了不相关的代码）：

var allSuburbsList = new Array([{"SuburbID":1,"SuburbAreaID":3,"SuburbName":"Alberante","SuburbActive":true,"Area":null,"Agents":[]},{"SuburbID":4,"SuburbAreaID":3,"SuburbName":"Alberton North","SuburbActive":true,"Area":null,"Agents":[]}]);

var a3burbs = _.filter(allSuburbsList, function(s) { return s.SuburbAreaID === 3; }); 
// 3 is a test value. All the test suburbs so far fall under area no. 3.

使用此过滤器， a3burbs作为一个空数组[] 。 如果我作弊并制作过滤器：

var a3burbs = _.filter(allSuburbsList, function(s) { return true; }); 

然后a3bubrs出来的精确副本allSuburbsList ，与包括所有的郊区。 我可能做错了什么？ 我使用的是与Underscore.js主页上指示的语法相同的语法。

顺便说一句，我从viewmodel数组属性填充allSuburbsList的方式是否与此有关：

var allSuburbsList = new Array(@Html.Raw(JsonConvert.SerializeObject(Model.AllSuburbs)));

出于兴趣，我的第一个尝试是下面的丑陋代码，但是它起作用了：

var a3burbs = [];
@{for (var i = 0; i < Model.AllSuburbs.Length; i++) {
    @:if (allSuburbsList[@i].SuburbAreaID === 3) {
        @:a3burbs.push(allSuburbsList[@i]);
    };
};

Answer 1

您正在创建一个新数组并传递一个数组。

更改为

var allSuburbsList = [{"SuburbID":1,"SuburbAreaID":3,"SuburbName":"Alberante","SuburbActive":true,"Area":null,"Agents":[]},{"SuburbID":4,"SuburbAreaID":3,"SuburbName":"Alberton North","SuburbActive":true,"Area":null,"Agents":[]}];

Answer 2

使用new Array([{}]) ，您正在另一个数组中创建一个数组。 只需实例化而无需new Array()