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 = { 'Geeksforgeeks' : {
'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:
{Geeksforgeeks: "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 = { 'Geeksforgeeks' : {
'username' : 'gfg_id' ,
'password' : 'gfg@123'
},
'W3school' : {
'username' : 'w3school_id' ,
'password' : 'w@123'
}
}; // Using the _.mapValues() method console.log(_.mapValues(users, 'username' ));
|
Output:
{ Geeksforgeeks: 'gfg_id', W3school: 'w3school_id' }