The Underscore.js _.curry() method returns a curried version of the given function. If the reverse is true, arguments will be processed from right to left.
Syntax:
_.curry( fun, reverse )
Parameters: This method takes two parameters as listed above and discussed below.
- fun: This is the given function.
- reverse: It is an optional parameter and determines whether the arguments will be reversed or not
Return Value: It returns a curried version of the 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:Â
Javascript
// Defining underscore contrib variable var _ = require('underscore-contrib');Â Â Â // Function function fun(a, b, c, d){ Â Â Â Â return a + b + c + d; } Â Â // Making curried function var gfgFunc = _.curry(fun); Â Â // Only operates for arguments same // as the number in function console.log("Addition is :", Â Â Â Â Â Â Â Â gfgFunc(2)(23)(2)(3)); Â Â // Not adds for less arguments console.log(gfgFunc(1)(2)); |
Output:
Addition is : 30 [Function: mustBeUnary]
Example 2:
Javascript
// Defining underscore contrib variable var _ = require('underscore-contrib');Â Â Â // Function function fun(a, b, c) { Â Â Â Â return a * b * c; } Â Â // Making curried function var gfgFunc = _.curry(fun); Â Â // Only operates for arguments same // as the number in function console.log("Multiplication is :", Â Â Â Â Â Â Â Â gfgFunc(2)(23)(2)); Â Â // Not multiplies for less arguments console.log(gfgFunc(1)(2)); |
Output:Â
Multiplication is : 92 [Function: mustBeUnary]
Example 3: Arguments are processed right to left for reversed = true.
Javascript
// Defining underscore contrib variable var _ = require('underscore-contrib');Â Â Â // Function function fun(a, b, c){ Â Â Â Â return arguments; } Â Â // Making curried function var gfgFunc = _.curry(fun,true); Â Â // Only operates for arguments same // as the number in function console.log("curried arguments are :", Â Â Â Â gfgFunc("arg1")("arg2")("arg3")); |
Output: Arguments are stored in reverse order.
curried arguments are : [Arguments]
{ '0': 'arg3', '1': 'arg2', '2': 'arg1' }
Example 4: Arguments are processed left to right for reversed = false.
Javascript
// Defining underscore contrib variable var _ = require('underscore-contrib');Â Â Â // Function function fun(a, b, c){ Â Â Â Â return arguments; } Â Â // Making curried function var gfgFunc = _.curry(fun,false); Â Â // Only operates for arguments same // as the number in function console.log("curried arguments are :", Â Â Â Â gfgFunc("arg1")("arg2")("arg3")); |
Output:Â
curried arguments are : [Arguments]
{ '0': 'arg1', '1': 'arg2', '2': 'arg3' }
Whether you’re preparing for your first job interview or aiming to upskill in this ever-evolving tech landscape, neveropen Courses are your key to success. We provide top-quality content at affordable prices, all geared towards accelerating your growth in a time-bound manner. Join the millions we’ve already empowered, and we’re here to do the same for you. Don’t miss out – check it out now!
