- Underscore.JS Tutorial
- Underscore.JS - Home
- Underscore.JS - Overview
- Underscore.JS - Environment Setup
- Underscore.JS - Iterating Collection
- Underscore.JS - Processing Collection
- Underscore.JS - Iterating Array
- Underscore.JS - Processing Array
- Underscore.JS - Functions
- Underscore.JS - Mapping Objects
- Underscore.JS - Updating Objects
- Underscore.JS - Comparing Objects
- Underscore.JS - Utilities
- Underscore.JS - Chaining
- Underscore.JS Useful Resources
- Underscore.JS - Quick Guide
- Underscore.JS - Useful Resources
- Underscore.JS - Discussion
Underscore.JS - defaults method
Syntax
_.defaults(object, *defaults)
defaults method fills the default values in undefined properties of object passed using first value present in defaults objects and returns the result. See the below example −
Example
var _ = require('underscore'); var student = { name : 'Sam'}; // Example 1: use defaults to add class var student1 = _.defaults(student, {class: 10}); console.log(student1); // Example 2: use defaults to add class and school as default properties student1 = _.defaults(student, {class: 10}, {school: 'Government'}); console.log(student1);
Save the above program in tester.js. Run the following command to execute this program.
Command
\>node tester.js
Output
{ name: 'Sam', class: 10 } { name: 'Sam', class: 10, school: 'Government' }
underscorejs_updating_objects.htm
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