- 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 - keys method
Syntax
_.keys(object)
keys method return all the names of object's properties. See the below example −
Example
var _ = require('underscore'); // Example 1 var result = _.keys({one: 1, two : 2, three: 3}); console.log(result); // Example 2 result = _.keys({ name: 'Sam', age: 30}); console.log(result);
Save the above program in tester.js. Run the following command to execute this program.
Command
\>node tester.js
Output
[ 'one', 'two', 'three' ] [ 'name', 'age' ]
underscorejs_mapping_objects.htm
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