How to think in complex quiz like Counting Cards

JavaScript
1

Why I cannot think about what to do as I saw the hint and see how it work, yet it is hard for me to understand it. It is like I get brain fog. Why is that and how to overcome it?


var count = 0;

function cc(card) {
  // Only change code below this line
  
  
  return "Change Me";
  // Only change code above this line
}

// Add/remove calls to test your function.
// Note: Only the last will display
cc(2); cc(3); cc(7); cc('K'); cc('A');

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User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.131 Safari/537.36.

Link to the challenge:
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-javascript/counting-cards

2

Don’t start out thinking about how to impliment a solution via code. First break down the problem and make sure you understand it. Then find the logical solution without worrying about the computer. If you had to give a human very specific an detailed instructions, how would you do it. Once you have that logical structure, you can translate it it JavaScript.

4 Likes
3

Think of an actual deck of cards. The function you are writing will be called several times, which is represented by cc(2); cc(3); cc(7); cc(‘K’); cc(‘A’); Each time the function is called represents one card shown. Based on the cards that have been shown (2, 3, 7, K, A), should we BET or HOLD? In order find out we ‘count’ the cards. There are 3 possibilities we are tracking:

+1 Low Card (2, 3, 4, 5, 6 )
+0 Neutral Card (7, 8, 9)
-1 High Card (10, ‘J’, ‘Q’, ‘K’, ‘A’)

If a low card is shown, you should increase the global variable ‘count’ by 1. If Neutral card do nothing, if high card decrease global variable ‘count’ by 1.

The count variable is resting outside the function because this will allow us to count multiple cards and give a recommendation for BET or HOLD at any given time, regardless of how many cards have been shown.

I hope this helps. Happy coding!

1 Like
4

What wonderful advice. Thanks Nancy

5

@ArielLeslie Thanks, ur advice was very helpful. Now following is my code but I am stuck. My first two cases work, but next 2 doesn’t. I wonder what I am doing wrong here? I can try to get hint and I did but this way I am getting more understanding of why should I and shouldn’t I use switch or if/else.

var count = 0;

function cc(card) {
  // Only change code below this line
if(card >=2 && card <= 6){
  console.log(count+=card);
  return  "5 Bet"
}else if(card >=7 && card <=9){
  return "0 Hold"
}else if((card == 10) || (card == 'J') || (card == 'Q') || (card == 'K') || (card == 'A')){
  console.log("-5 Hold");
}else if((card == 3) || (card == 7) || (card == 'Q') || (card == 8) || (card == 'A')){
  console.log("-1 Hold")
}
  return "Change Me";
  // Only change code above this line
}

// Add/remove calls to test your function.
// Note: Only the last will display
cc(2); cc(3); cc(7); cc('K'); cc('A');
7

I will give it a go tomorrow.

8

WAOOOO BRAVOOOOO thank you

9

Wish I had seen all these before peeking the answers Peeked so much that I have run away from them