Underscore.js _.hasPath() Method

The _.hasPath() method returns a boolean indicating whether there is a property at the path described by the keys given. Keys may be given as an array or as a dot-separated string.

Syntax:

_.hasPath( Object_name, key_string|array );

Parameters:

• Object_name: Object from which the value is to be searched.
• key_string | array: Given dot-separated string or array to be searched in the given object.

Return Value: This method returns a Boolean.

Note: This will not work in normal JavaScript because it requires the underscore.js contrib library to be installed. 

Underscore.js contrib library can be installed using npm install underscore-contrib –save.

Example 1:

Javascript

// Defining underscore contrib variable
var _ = require('underscore-contrib');

var ob = { gfg : {
GeeksforGeeks :  "Computer Science Portal for Geeks"
            }
        };
var val = _.hasPath( ob, ['gfg','GeeksforGeeks'] );

console.log(val);

Output:

true

Example 2: 

Javascript

// Defining underscore contrib variable
var _ = require('underscore-contrib');

var ob = { gfg : {
    GeeksforGeeks :  "Computer Science Portal for Geeks"
            }
        };
var val = _.hasPath( ob, 'gfg.GeeksforGeeks');

console.log(val);

Output:

true

Example 3: 

Javascript

// Defining underscore contrib variable
var _ = require('underscore-contrib');

var ob = { gfg : {
GeeksforGeeks :  "Computer Science Portal for Geeks"
            }
        };
var val = _.hasPath( ob, 'gfg.Geeks');

console.log(val);

Output:

false