Lodash _.mapArgsWith() Method

The Lodash _.mapArgsWith() method takes a mapping function and returns a new combinator function which will take a target function and will return a new function that maps its arguments with the mapping function before executing the body of the target function.

Syntax:

_.mapArgsWith( mapping_function );

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

• mapping_function: Mapping function to be accepted by the function.

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 _.mapArgsWith() method in JavaScript:

Example 1: we made a function that cubes the given value then adds that value to itself.

Javascript

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

function add (x)
{
    return x + x + x ; }

function sub (x)
{
    return  x - 2;
}

var addnow = _.mapArgsWith(sub);

var subnow = addnow(add);

console.log(subnow(7))

Output:

15

Example 2: 

Javascript

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

function squ (x)
{
    return x * x ; }

function add (x)
{
    return  x + 10;
}

var addnow = _.mapArgsWith(add);

var sq = addnow(squ);

console.log(sq(5))

Output:

225

Example 3: 

Javascript

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

function cs (x)
{
    return "GeeksforGeeks : Computer Science Portal for Geeks" ; }

function geek (x)
{
    return  "GeeksforGeeks";
}

var gfg = _.mapArgsWith(geek);

var gfgFunc = gfg(cs);

console.log(gfgFunc())

Output:

GeeksforGeeks : Computer Science Portal for Geeks

Example 4: 

Javascript

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

function cs (x)
{
    return x; }

function geek (x)
{
    return  x[0]+" : "+x[1];
}

var gfg = _.mapArgsWith(geek);

var gfgFunc = gfg(cs);

console.log(gfgFunc(["GeeksforGeeks",
    "Computer Science Portal for Geeks"]))

Output:

GeeksforGeeks : Computer Science Portal for Geeks