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Backbone.js集合切片方法用于从集合模型返回元素的浅表副本。
句法：
collection.slice(begin, end)参数说明
begin：指定元素的开始。
end：指定元素的结尾。
让我们举个例子。
请参阅以下示例：
<!DOCTYPE html>
<head>
<title>Slice Collection Example</title>
<script src="https://code.jquery.com/jquery-2.1.3.min.js" type="text/javascript"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.2/underscore-min.js" type="text/javascript"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.1.2/backbone-min.js" type="text/javascript"></script>
</head>
<body>
<script type="text/javascript">
var City = Backbone.Model.extend();
//The variable "Cities" contains the elements which are to be displayed when 'slice()' method is called
var Cities =['Mau', 'Allahabad', 'Ghaziabad', 'New Delhi', 'Noida'];
//The collection instance "cities" uses the "Cities" variable to represent the model elements in the collection
var cities = new Backbone.Collection(Cities, {
model:City
});
//The slice(1, 4) method begins the element extraction at index "1" and ends the extraction of elements up to the index "4"
var mycity = Cities.slice(1, 4);
//The 'length' property specifies the total number of sliced elements between 1 and 4
document.write("Number of Cities:", +mycity.length);
document.write("<br>");
document.write(JSON.stringify(mycity));
</script>
</body>
</html>输出：
将以上代码保存在slice.html文件中，并在新的浏览器中打开此文件。
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