Underscore.js _.rcurry2() Method

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The Underscore.js _.rcurry2() method returns a curried version of the given function where a maximum of two arguments are processed from right to left.

Syntax:

_.rcurry2( fun )

Parameters: This method takes a single parameter as listed above and discussed below:

fun: This is the given function passed as parameter.

Return Value: This method returns a curried function.

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

npm install underscore-contrib

Example 1:

// Defining underscore contrib variable 
var _ = require('underscore-contrib');  
  
// Function 
function div(a, b) { 
    return a/b; 
} 
  
var curried = _.rcurry2(div); 
  
console.log("Curried division is :",  
    curried(4)(16)); 

Output:

Curried division is : 4

Example 2:

// Defining underscore contrib variable 
var _ = require('underscore-contrib');  
  
// Function 
function sub(a, b) { 
    return a-b; 
} 
  
var curried = _.rcurry2(sub); 
  
console.log("Curried Subtraction is :",  
    curried(2)(4)); 

Output:

Curried Subtraction is : 2

Example 3: Reversed Arguments shown below:

// Defining underscore contrib variable 
var _ = require('underscore-contrib');  
  
// Function 
function div(a, b) { 
    return ("a="+a+" and b="+b); 
} 
  
var curried = _.rcurry2(div); 
  
console.log(curried("a")("b"));

Output:

a=b and b=a

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