Curry

mediumcodingJavaScriptFunctionsClosures~25 min

Asked at Meta, Google, Stripe

Overview

Implement curry(fn) — returns a curried version that accumulates arguments until fn.length is reached.

Examples

function add(a, b, c) { return a + b + c; }
const curried = curry(add);
curried(1)(2)(3); // 6
curried(1, 2)(3); // 6
curried(1)(2, 3); // 6

Solution

Reveal solution

function curry(fn) {
  return function curried(...args) {
    if (args.length >= fn.length) return fn(...args);
    return (...more) => curried(...args, ...more);
  };
}

curry.js

Curry

mediumcodingJavaScriptFunctions

Overview

Implement curry(fn) — returns a curried version that accumulates arguments until fn.length is reached.

Examples

function add(a, b, c) { return a + b + c; }
const curried = curry(add);
curried(1)(2)(3); // 6
curried(1, 2)(3); // 6
curried(1)(2, 3); // 6

Solution

Reveal solution

function curry(fn) {
  return function curried(...args) {
    if (args.length >= fn.length) return fn(...args);
    return (...more) => curried(...args, ...more);
  };
}

NameTopicDifficulty

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103 of 103 problems