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POCannot call method 'push' of undefined
 

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    <p>I had this working in a fiddle just fine (which I can't find now), but when I moved it to VS2012 I'm getting the error "Cannot call method 'push' of undefined'. </p> <p>In the code below, the createItemDiv() function works great and creates the UI elements. It's the line before that, showItem() which calls this.visibleItem.push() that is throwing the error. I had a problem with this in the fiddle originally and added the "this" to fix it. If I remove "this" as it is now, I get "visibleItem is not defined".</p> <p><strong>viewmodel.js</strong></p> <pre><code>var dummyResults = [ { //sample data is here } ] var dummyItems = [ ] function VisibleItem(data) { var self = this; this.name = ko.observable(data.name); this.type = ko.observable(data.type); this.description = ko.observable(""); } function SearchResult(data) { var self = this; this.name = ko.observable(data.name); this.type = ko.observable(data.type); } var viewModel = { searchResult: ko.observableArray(ko.utils.arrayMap(dummyResults, function (item) { return new SearchResult(item); })), visibleItem: ko.observableArray(ko.utils.arrayMap(dummyItems, function (item) { return new VisibleItem(item); })), showItem: function (item) { this.visibleItem.push(item); } }; ko.applyBindings(viewModel); </code></pre> <p><strong>site.js</strong></p> <pre><code>$(document).on('click', '.result', function () { var item = ko.dataFor(this); viewModel.showItem(item); //add item to "visibleItems" viewmodel for management createItemDiv(item); //ui function to show item on screen }); </code></pre>
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