Lodash is a JavaScript library that works on the top of underscore.js. Lodash helps in working with arrays, strings, objects, numbers, etc.
The _.mapValues() method is used to create a new mapped object with the same keys of the given object and the values are generated using the given iteratee function.
Syntax:
_.mapValues( object, iteratee )
Parameters: This method accepts two parameters as mentioned above and described below:
- object: This parameter holds the object to iterate over.
- iteratee: This parameter holds the function that is invoked per iteration on the object. It is an optional value.
Return Value: This method returns the new mapped object.
Example 1:
Javascript
// Requiring the lodash library const _ = require("lodash"); var users = {'Geeksforneveropen': { 'username': 'gfg_id', 'password': 'gfg@123' }, 'W3school': { 'username': 'w3school_id', 'password': 'w@123' }};// Using the _.mapValues() method console.log( _.mapValues(users, function(o) { return o.password; })); |
Output:
{Geeksforneveropen: "gfg@123", W3school: "w@123"}
Example 2:
Javascript
// Requiring the lodash library const _ = require("lodash"); var users = { 'Geeksforneveropen': { 'username': 'gfg_id', 'password': 'gfg@123' }, 'W3school': { 'username': 'w3school_id', 'password': 'w@123' }};// Using the _.mapValues() method console.log(_.mapValues(users, 'password')); |
Output:
{Geeksforneveropen: "gfg@123", W3school: "w@123"}
