Underscore.js _.hasPath() Method

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

Output:

true

Example 2:

Javascript

// Defining underscore contrib variable 
var _ = require('underscore-contrib');  
  
var ob = { gfg : { 
    zambiatek :  "Computer Science Portal for Geeks"
            } 
        }; 
var val = _.hasPath( ob, 'gfg.zambiatek'); 
  
console.log(val);

Output:

true

Example 3:

Javascript

// Defining underscore contrib variable 
var _ = require('underscore-contrib');  
  
var ob = { gfg : { 
zambiatek :  "Computer Science Portal for Geeks"
            } 
        }; 
var val = _.hasPath( ob, 'gfg.Geeks'); 
  
console.log(val);

Output:

false

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