Underscore.js _.kv() Method

0 0 1 minute read

The _.kv() method returns the key/value pair for a given property in an object, returns undefined if not found.

Syntax:

_.kv( Object_name, property );

Parameters:

Object_name: Object from which the key/value pair is to be searched.
property: Given the property of which given key/value pair is to be searched.

Return Value: This method returns the key/value pair for a given property.

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" }; 
var val = _.kv( ob, "gfg"); 
  
console.log(val);

Output:

[ 'gfg', 'zambiatek' ]

Example 2: if no key/value is found, this method returns undefined.

Javascript

// Defining underscore contrib variable 
var _ = require('underscore-contrib');  
  
var ob = { "gfg" : "zambiatek" }; 
var val = _.kv( ob, "geek"); 
  
console.log(val);

Output:

undefined

Whether you’re preparing for your first job interview or aiming to upskill in this ever-evolving tech landscape, zambiatek Courses are your key to success. We provide top-quality content at affordable prices, all geared towards accelerating your growth in a time-bound manner. Join the millions we’ve already empowered, and we’re here to do the same for you. Don’t miss out – check it out now!