JavaScript Hacks: 14 Obscure Yet Powerful Techniques You Need to Know

As a versatile and ubiquitous programming language, JavaScript is packed with powerful features that are often overlooked by beginners and even intermediate developers. In this article I will show you some of the most fascinating and lesser-known techniques.

Currying:

Currying is a technique that involves the transformation of a function that takes multiple arguments into a sequence of functions that each take a single argument. Currying can make your code more flexible and reusable by allowing partial application of arguments.

Example 1 (Basic currying):

function curryAdd(x) {
  return function(y) {
    return x + y;
  };
}

const add5 = curryAdd(5);
console.log(add5(3)); // Output: 8

Example 2 (Currying with arrow functions):

const curryMultiply = x => y => x * y;
const double = curryMultiply(2);
console.log(double(4)); // Output: 8

Memoization:

Memoization is a technique to optimize expensive function calls by caching the results of these calls and returning the cached result when the same inputs occur again. This can significantly speed up the execution of recursive or iterative functions with overlapping subproblems.