The Backbone.JS Remove() collection method removes a model or array of models from a collection.
Syntax:
Backbone.Collection.Remove ( models, options )
Parameters:
models: This parameter is used to specify the models to be removed from the collection.
options: This parameter is used to specify the model types.
Example:
<title>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>
<script type="text/javascript">
var num = Backbone.Model.extend({
defaults: {
number: 1
} });
var X = Backbone.Collection.extend({
model: num
});
var num1 = new num({number: 2});
var num2 = new num({number: 3});
var num3 = new num({number: 4});
var numCollection = new X();
numCollection.add([num1,num2,num3]);
document.write('Number of added numbers : ' + numCollection.length);
document.write("<br>");
numCollection.remove([num1]);
document.write('Number of remaining numbers : ' + numCollection.length);
</script>Number of added numbers : 3<br>Number of remaining numbers : 2
<title>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>
<script type="text/javascript">
var num = Backbone.Model.extend({
defaults: {
number: 1
} });
var X = Backbone.Collection.extend({
model: num
});
var num1 = new num({number: 2});
var num2 = new num({number: 3});
var num3 = new num({number: 4});
var numCollection = new X();
numCollection.add([num1,num2,num3]);
document.write('Number of added numbers : ' + numCollection.length);
document.write("<br>");
numCollection.remove([num1]);
document.write('Number of remaining numbers : ' + numCollection.length);
</script>Number of added numbers : 3<br>Number of remaining numbers : 2
Example Number of added numbers : 3
Number of remaining numbers : 2
Output:
Number of added numbers : 3
Number of remaining numbers : 2
Number of added numbers : 3
Number of remaining numbers : 2
Number of added numbers : 3 Number of remaining numbers : 2
Explanation:
In the above example, Remove() method removes one model from a collection.