我有一個淘汰可觀察數組，其值分配在設定的時間值后發生變化，但在視圖中看不到這一點。有人能告訴我哪里做錯了嗎？我希望輸出顯示? GRE 1111 ? 托福 111但它表明? GRE2 222 ? 托福2 22jsFiddle 鏈接： https: //jsfiddle.net/4r37x9y5/HTML：console.clear();function viewModel() { this.plans = ko.observableArray([]);        var plans1 = [        { id: 'GRE', count: '1111' },        { id: 'TOEFL', count: '111' },        ];                    var plans2 = [        { id: 'GRE2', count: '222' },        { id: 'TOEFL2', count: '22' },        ];                this.plans = plans2;        //this.plans = plans1;                setTimeout(function(){        console.log("In timeout before assigning plans");      this.plans = plans1;      console.log(this.plans);      }, 2000);     }ko.applyBindings(viewModel());// The above line equals:// viewModel(); // updates window object and returns null!// ko.applyBindings(); // binds window object to body!<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.4.2/knockout-min.js"></script><div class="panel panel-default">    <ul data-bind="foreach: plans" class="list-group">        <li class="list-group-item">            <span data-bind="text: id"></span>            <span data-bind="text: count"></span>        </li>    </ul></div>