What is Currying?

Currying is the technique of converting a function that takes multiple arguments into a nested sequence of functions that each take a single argument.

Example of Currying

// Original Function
function multiply(a, b, c) {
  return a * b * c;
}
multiply(1, 2, 3); // $: 6

// Curried Version
function multiply(a) {
  return (b) => {
    return (c) => {
      return a * b * c;
    };
  };
}
multiply(1)(2)(3); // $: 6

// ES6 Curried Version
const multiply = (a) => (b) => (c) => a * b * c;
multiply(1)(2)(3); // $: 6