Understanding Currying in JavaScript: What, Why, How, and Where
Transforming Functions for Flexibility and Reusability in JavaScript
JavaScript is a versatile language, and one of its powerful features is the ability to manipulate functions in various ways.
One such manipulation is currying. If you’ve ever wondered what currying is, why it’s useful, how to implement it, and where to apply it, this article is for you.
What is Currying?
Currying is a technique in functional programming where a function that takes multiple arguments is transformed into a series of functions that each take a single argument.
In JavaScript, this means turning a function f(a, b, c) into f(a)(b)(c).
Currying allows for partial application of functions, where you can fix some arguments and produce a new function that takes the remaining arguments.
Example 1: Basic Currying
Let’s start with a simple example of a function that adds three numbers:
function add(a, b, c) {
return a + b + c;
}
// Calling the function normally
console.log(add(1, 2, 3)); // Output: 6
