Lodash _.setWith() Method

Lodash _.setWith() method is similar to _.set() method except that it accepts customizer which is invoked to produce the objects of path. And if the customizer returns undefined path creation is handled by the method instead.

Syntax:

_.setWith(object, path, value, customizer)

Parameters:

This method accepts four parameters as mentioned above and described below:

• object: It is the function that modifies the object.
• path: It sets the path of the property.
• value: It is used to set the values.
• customizer: It is the function to customize the assigned values.

Return Value:

This method returns the object.

Example 1: In this example, the code uses the Lodash library to set a nested property on an object and create the intermediate objects if they don’t exist, using the _.setWith method.

Here, const _ = require(‘lodash’) is used to import the lodash library in the file.

javascript

// Requiring the lodash library
const _ = require("lodash");

// Original array
let object = {};

// Using the _.setWith() method
let st_elem = _.setWith(object,
        '[0][3]', 'd', Object);

// Printing the output
console.log(st_elem);

Output:

{ '0': { '3': 'd' } }

Example 2: In this example, the code requires the Lodash library and utilizes the _.setWith method to set a deep property within an object, and then it displays the modified object in the console.

javascript

// Requiring the lodash library
const _ = require("lodash");

// Original array
let object = {};

// Using the _.setWith() method
let st_elem = _.setWith(object,
    '[0][1][2]', 'a', Object);

// Printing the output
console.log(st_elem);

Output:

{ '0': {'1': { '2': 'a' } } }

Note: This code will not work in normal JavaScript because it requires the library lodash to be installed.