Underscore.js _.rCurry() Method

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

Syntax:

_.rCurry( 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, c) { 
    return a/b/c; 
} 
  
var curried = _.rCurry(div); 
  
console.log("Curried division is :",  
    curried(2)(4)(16)); 

Output:

Curried division is : 2

Example 2:

// Defining underscore contrib variable 
var _ = require('underscore-contrib');  
  
// Function 
function div(a, b, c, d) { 
    return a-b-c-d; 
} 
  
var curried = _.rCurry(div); 
  
console.log("Curried Subtraction is :",  
    curried(2)(4)(16)(44)); 

Output:

Curried Subtraction is : 22

Example 3: Arguments are reversed as shown below:

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

Output:

a=c and b=b and c=a

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