just-curry-it

What is just-curry-it?

The just-curry-it npm package is a utility for currying functions. Currying is a functional programming technique where a function with multiple arguments is transformed into a sequence of functions each taking a single argument. This package simplifies the process of currying functions in JavaScript.

What are just-curry-it's main functionalities?

Basic Currying

This feature allows you to transform a function that takes multiple arguments into a curried function. The curried function can then be called with one argument at a time, or with multiple arguments at once.

const curry = require('just-curry-it');

function add(a, b, c) {
  return a + b + c;
}

const curriedAdd = curry(add);
console.log(curriedAdd(1)(2)(3)); // 6
console.log(curriedAdd(1, 2)(3)); // 6
console.log(curriedAdd(1)(2, 3)); // 6

Partial Application

This feature allows for partial application of functions. You can fix some arguments of the function and get a new function that takes the remaining arguments.

const curry = require('just-curry-it');

function multiply(a, b, c) {
  return a * b * c;
}

const curriedMultiply = curry(multiply);
const multiplyBy2 = curriedMultiply(2);
console.log(multiplyBy2(3, 4)); // 24
console.log(multiplyBy2(3)(4)); // 24

Other packages similar to just-curry-it

lodash

Lodash is a popular utility library that provides a wide range of functions for common programming tasks, including currying. The `_.curry` method in Lodash offers similar functionality to just-curry-it but comes with the added benefit of a comprehensive suite of other utilities.

ramda

Ramda is a functional programming library for JavaScript that emphasizes immutability and side-effect-free functions. It provides a `R.curry` function that offers currying capabilities similar to just-curry-it, but it is part of a larger set of functional programming tools.

curry

The `curry` package is a lightweight utility specifically designed for currying functions. It offers similar functionality to just-curry-it but is focused solely on currying without additional utilities.

README

just-curry-it

Part of a library of zero-dependency npm modules that do just do one thing. Guilt-free utilities for every occasion.

🍦 Try it

npm install just-curry-it

yarn add just-curry-it

Return a curried function

import curry from 'just-curry-it';

function add(a, b, c) {
  return a + b + c;
}
curry(add)(1)(2)(3); // 6
curry(add)(1)(2)(2); // 5
curry(add)(2)(4, 3); // 9

function add(...args) {
  return args.reduce((sum, n) => sum + n, 0)
}
var curryAdd4 = curry(add, 4)
curryAdd4(1)(2, 3)(4); // 10

function converter(ratio, input) {
  return (input*ratio).toFixed(1);
}
const curriedConverter = curry(converter)
const milesToKm = curriedConverter(1.62);
milesToKm(35); // 56.7
milesToKm(10); // 16.2