remove from array

http://stackoverflow.com/questions/12201010/remove-from-observablearray-knockoutjs

by rniemeyer

HTML

<script src="http://cloud.github.com/downloads/SteveSanderson/knockout/knockout-2.1.0.js"></script>
<div>
    Name: <span data-bind="text: Name"></span>
</div>
<div>
    Items: <button data-bind="click: addItem">Add Item</button>
</div>
<div>
    <table>
        <tbody data-bind="template: { name: 'itemTemplate', foreach: Items }"></tbody>
    </table>
</div>

<button data-bind="click: getJSON">Show JSON</button>

<script type="text/html" id="itemTemplate">
    <tr>
        <td>
            <input data-bind="value: value" />
            <a href="#" data-bind="click: $parent.removeItem">Remove Item</a>
        </td>
    </tr>
</script>

JavaScript

var data = {
    Name: "Test",
    Items: ["One", "Two", "Three"]    
};

function ViewModel(data) {
    var self = this;
    self.Name = ko.observable(data.Name);
    self.Items = ko.observableArray(ko.utils.arrayMap(data.Items, function(item) {
        return { value: ko.observable(item) };
    }));
                                    
    self.addItem = function() { self.Items.push({ value: ko.observable("") }); };
    self.removeItem = function(data) { 
        self.Items.remove(data);
    };
    
    self.getJSON = function() {
        //if the key is a # (array item) and it has value prop, then return it instead
        alert(ko.toJSON(self, function(key, value) {
            if (!isNaN(key) && value && value.value) {
                return value.value;
            }                
            return value;
        }, 2));
    };        
}
$(document).ready(function() {ko.applyBindings(new ViewModel(data)); });