Today I Learned - Rocky Kev

TIL the difference between partial application and currying

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TAGS: advanced javascript closure

Currying and Partial Application are related (because of closure), but they are of different concepts.

Partial application transforms a function into another function with smaller set of arguments.

// partial application
function add(a, b, c) {
  return a + b + c;
}

function partial(fn, ...args) {
  return function (...moreArgs) {
    return fn(...args, ...moreArgs);
  };
}

const addTwoNumbers = partial(add, 10, 20);

console.log(addTwoNumbers(30)); // Output: 60

Currying creates nesting functions according to the number of the arguments of the function. Each function receives an argument.

function add(a) {
  return function (b) {
    return function (c) {
      return a + b + c;
    };
  };
}

const addThreeNumbers = add(10)(20);

console.log(addThreeNumbers(30)); // Output: 60

via JavaScript Currying Currying in JavaScript

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TIL the difference between partial application and currying

Partial application transforms a function into another function with smaller set of arguments. Currying creates nesting functions according to the number of the arguments of the function. Each function receives an argument.