2667. Create Hello World Function

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題目敘述

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”.

解題思路

Solution

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

/**
 * const f = createHelloWorld();
 * f(); // "Hello World"
 */

function createHelloWorld() {
	return function(...args): string {
        return "Hello World";
    };
};

/**
 * const f = createHelloWorld();
 * f(); // "Hello World"
 */