Use Recursion to Create a Countdown HELP

JavaScript
1

Tell us what’s happening:
Please, could someone check my code, why reverse doesn’t work for me? It prints: [ 5, 3, 1, 2, 4 ]… :sob:
Your code so far


// Only change code below this line
function countdown(n){
if (n<1) {
  return [];
} else {
  const countArray = countdown(n-1);
  countArray.push(n);
  return countArray.reverse();
  }
}

console.log(countdown(5));
// Only change code above this line

  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.90 Safari/537.36.

Challenge: Use Recursion to Create a Countdown

Link to the challenge:

2

There’s a better way! Instead of reversing each recursion why not reversing the way you push?

Like with the unshift

3

Oh, okay, thank you! That’s cool!

But still, why reverse doesn’t work here? Even if my code is one line longer, shouldn’t it print correct answer with reverse?

4

you are reversing at each time
so it starts with [1], then 2 is added, [1,2], then it is reversed, [2,1], then 3 is added, [2,1,3], then it is reversed, [3,1,2], and so on

2 Likes
5

I see… Thank you for explaining this to me!

6

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