Underscore.js`filter`不起作用

Question

我有以下代碼片段，用於從用戶選擇的列表中選擇哪個郊區（省略了不相關的代碼）：

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.

使用此過濾器， a3burbs作為一個空數組[] 。 如果我作弊並制作過濾器：

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

然后a3bubrs出來的精確副本allSuburbsList ，與包括所有的郊區。 我可能做錯了什么？ 我使用的是與Underscore.js主頁上指示的語法相同的語法。

順便說一句，我從viewmodel數組屬性填充allSuburbsList的方式是否與此有關：

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

出於興趣，我的第一個嘗試是下面的丑陋代碼，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

您正在創建一個新數組並傳遞一個數組。

更改為

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([{}]) ，您正在另一個數組中創建一個數組。 只需實例化而無需new Array()