Algorithm
30 Days of JavaScript
Create Hello World Function

2667. Create Hello World Function

Tags

  • Closures

Link

https://leetcode.com/problems/create-hello-world-function/description/?envType=study-plan-v2&envId=30-days-of-javascript (opens in a new tab)

Question

Write a function createHelloWorld. It should return a new function that always returns "Hello World".

Example 1:
Input: args = []
Output: "Hello World"
Explanation:
const f = createHelloWorld();
f(); // "Hello World"

The function returned by createHelloWorld should always return "Hello World".
Example 2:
Input: args = [{},null,42]
Output: "Hello World"
Explanation:
const f = createHelloWorld();
f({}, null, 42); // "Hello World"

Any arguments could be passed to the function but it should still always return "Hello World".
Constraints:
  • 0 <= args.length <= 10

Answer

JavaScript

/**
 * @return {Function}
 */
var createHelloWorld = function () {
  return function (...args) {
    return "Hello World";
  };
};
 
/**
 * const f = createHelloWorld();
 * f(); // "Hello World"
 */
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