Learning Code

Functional Programming

// function within function
const createMultiplierShortHand = y => x => x * y;

// In other words
const createMultiplier = (y) => { 
  return (x) => {
    return x * y;
  };
};

const double = createMultiplier(2);
const triple = createMultiplier(3);

console.log(double); // [Function]
console.log(double(2)); // 4
console.log(triple(2)); // 6