Lodash _.functionalize() Method

The Lodash _.functionalize() method takes a function (one which uses this) and pushes this into the argument list. The returned function uses its first argument as the receiver/context of the original function, and the rest of the arguments are used as the original’s entire argument list.

Syntax:

_.functionalize( function )

Parameters: This method accepts a single parameter as mentioned above and defined below:

• function: This method takes a function that uses this.

Return Value: This method returns a function.

Note: To execute the below examples, you have to install the lodash-contrib library by using this command prompt and execute the following command.

npm install lodash-contrib

Below examples illustrate the Lodash _.functionalize() method in JavaScript:

Example 1:

Javascript

// Defining lodash contrib variable
var _ = require('lodash-contrib');

function get(g) {
        return this[g];
    }

var geekFunc = _.functionalize(geta);

var geeks = {
    GeeksforGeeks: "Computer Science Portal for Geeks"
};
console.log(geekFunc(geeks,"GeeksforGeeks"))

Output:

Computer Science Portal for Geeks

Example 2: 

Javascript

// Defining lodash contrib variable
var _ = require('lodash-contrib');

function get(g) {
        return this[g];
    }

var geekFunc = _.functionalize(get);

var geeks = {
    GeeksforGeeks: 1000000
};
console.log(geekFunc(geeks,"GeeksforGeeks"))

Output:

1000000