Create Hello World Function

Easy

Amazon

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You are given a challenge to create a function named createHelloWorld. This function should not take any explicit arguments but must return another function. The function that is returned should, when invoked, always return the string "Hello World", irrespective of any arguments passed to it.

Consider these examples to clarify the requirements:

If you call createHelloWorld and then invoke the returned function without any arguments like this:
```
const f = createHelloWorld();
f(); // Expected output: "Hello World"
```
It should return "Hello World".
If you call createHelloWorld and invoke the returned function with any number of arbitrary arguments, like this:
```
const f = createHelloWorld();
f({}, null, 42); // Expected output: "Hello World"
```
It should still return "Hello World".

Your task is to implement the createHelloWorld function in JavaScript such that it adheres to these conditions. The goal is to create a higher-order function that encapsulates the behavior of returning a fixed string, regardless of the input it receives.

Create Hello World Function

Easy

Amazon

0 views

Consider these examples to clarify the requirements:

If you call createHelloWorld and then invoke the returned function without any arguments like this:
```
const f = createHelloWorld();
f(); // Expected output: "Hello World"
```
It should return "Hello World".
If you call createHelloWorld and invoke the returned function with any number of arbitrary arguments, like this:
```
const f = createHelloWorld();
f({}, null, 42); // Expected output: "Hello World"
```
It should still return "Hello World".

Solution

Naive Solution

A naive solution is simply to define a function that returns another function. The inner function, when called, will always return the string "Hello World". This approach directly implements the problem description without any complex logic.

function createHelloWorld() {
  return function() {
    return "Hello World";
  }
}

Big(O) Analysis

Time Complexity: O(1). The createHelloWorld function and the returned function both execute in constant time, regardless of the input.
Space Complexity: O(1). The space used is constant as it only stores the function definition and the string "Hello World".

Edge Cases

There are no specific edge cases for this problem as the returned function is designed to always return the same string regardless of any input.

Optimal Solution

The naive solution is already optimal since the problem requires a function that always returns the same string. No further optimization is needed.

function createHelloWorld() {
  return function() {
    return "Hello World";
  }
}

Big(O) Analysis

Time Complexity: O(1). The createHelloWorld function and the returned function both execute in constant time, regardless of the input.
Space Complexity: O(1). The space used is constant as it only stores the function definition and the string "Hello World".

Edge Cases

There are no specific edge cases for this problem as the returned function is designed to always return the same string regardless of any input.

Solution

Naive Solution

function createHelloWorld() {
  return function() {
    return "Hello World";
  }
}

Big(O) Analysis

Time Complexity: O(1). The createHelloWorld function and the returned function both execute in constant time, regardless of the input.
Space Complexity: O(1). The space used is constant as it only stores the function definition and the string "Hello World".

Edge Cases

There are no specific edge cases for this problem as the returned function is designed to always return the same string regardless of any input.

Optimal Solution

The naive solution is already optimal since the problem requires a function that always returns the same string. No further optimization is needed.

function createHelloWorld() {
  return function() {
    return "Hello World";
  }
}

Big(O) Analysis

Time Complexity: O(1). The createHelloWorld function and the returned function both execute in constant time, regardless of the input.
Space Complexity: O(1). The space used is constant as it only stores the function definition and the string "Hello World".

Edge Cases

There are no specific edge cases for this problem as the returned function is designed to always return the same string regardless of any input.