Currying in JavaScript is a technique that transforms functions with multiple arguments into a sequence of functions that each take a single argument. This enables easier reusability and configuration of functions, though native support for currying does not exist in JavaScript, libraries like lodash provide utility for converting functions. Examples demonstrate how to implement and use currying to make function calls more efficient.

1. CURRYING
IN JAVASCRIPT
JS NUGGETS

2. ● Currying is a technique of evaluating function with
multiple arguments, into sequence of function with
single argument.
● Currying is a transformation of functions that
translates a function from callable as f(a, b, c)
into callable as f(a)(b)(c).
function curry(f) {
return function(a) {
return function(b) {
return f(a, b);
};
};
}
function sum(a, b) {
return a + b;
}
let curriedSum = curry(sum);
curriedSum(1)(2);
// 3
WHAT IS CURRYING?

3. How to convert an existing function to
curried version?
The curry function does not exist in native
JavaScript. But libraries like lodash makes it
easier to convert a function to curried one.
let add = function(a, b, c) {
return a + b + c;
};
let curried = _.curry(add);
let addByTwo = curried(2);
console.log(addByTwo(0, 0)); // 2
console.log(add(2, 1, 1)); // 4
console.log(curried(4)(5)(6)); // 15
● Currying helps you to avoid passing the same
variable again and again.
● Little pieces can be configured and reused with
ease.
WHY IS IT USEFUL?