Lodash _.mapValues() Method
Lodash _.mapValues() method is used to create a new mapped object with the same keys as the given object and the values are generated using the given iteratee function.
Syntax:
_.mapValues(object, iteratee);
Parameters:
- 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: In this example, we are creating a new object having the same password as the old one by the use of the lodash _.mapValues() method.
Javascript
// Requiring the lodash library const _ = require( "lodash" ); let users = { 'w3wiki' : { '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:
{w3wiki: "gfg@123", W3school: "w@123"}
Example 2: In this example, we are creating a new object having the same username as the old one by the use of the lodash _.mapValues() method.
Javascript
// Requiring the lodash library const _ = require( "lodash" ); let users = { 'w3wiki' : { 'username' : 'gfg_id' , 'password' : 'gfg@123' }, 'W3school' : { 'username' : 'w3school_id' , 'password' : 'w@123' } }; // Using the _.mapValues() method console.log(_.mapValues(users, 'username' )); |
Output:
{ w3wiki: 'gfg_id', W3school: 'w3school_id' }
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