Lodash _.mapArgs() Method

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The Lodash _.mapArgs() method takes a target function and returns a new function that accepts a mapping function, which in turn returns a function that will map its arguments before calling the original target function.

Syntax:

_.mapArgs( target_function, mapping_function );

Parameters: This method accepts two parameters as mentioned above and defined below:

target_function: This parameter is original function called.
mapping_function: It is a 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 _.mapArgs() 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; } 
  
function cube (x)  
{ 
    return  x * x * x;  
} 
  
var cubethenadd = _.mapArgs(add)(cube); 
  
console.log(cubethenadd(5))

Output:

Example 2:

Javascript

// Defining lodash contrib variable 
var _ = require('lodash-contrib');  
  
function add (x)  
{  
    return x + x; } 
  
function sub (x)  
{ 
    return  x - x;  
} 
  
var subthenadd = _.mapArgs(add)(sub); 
  
console.log(subthenadd(7))

Output:

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