Build a Cash Register Project - Build a Cash Register

JavaScript
21

Thank you for your time. i will go through it and drop update here

22

send cid to console.log() at the end of your function and watch what happens to it as you do your testing

23

i send the cid to the console and when i press the purchase button the cid appears with the bills from highest denomination to lowest and if i press purchase button again it appears with the cid from lowest to highest. i tried decrementing totalAmountInDrawer but that didn’t work

    while (change >= equivalentOfAmountInDrawer && availableAmount > 0) {
        change = Number((change - equivalentOfAmountInDrawer).toFixed(2));
        totalAmountInDrawer--;
        availableAmount--;
        amountCollected++;
      }
24

you may want to avoid changing the global cid

25

but don’t i need the cid.reverse() to reverse the array so it could start from the highest denomination in the array?

26

but what does reverse do?
it changes cid, it does not create a new copy

so you are changing the global cid

27

Now you see why your output keep reversing back and forth?

28

No, you don’t need reverse() to do that. Think about a simple for loop to access array elements in reverse.

Also, think about checking each currency that has a value in cid rather than just the total amount in the drawer. I mean, if you have to give change of 5.38 and you have no fives and you have only 3 ones and 2 quarters and no dimes or nickels and just 30 pennies, you can’t give change. Your code doesn’t recognize that.

29

ok i created a variable that will handle reversing the cid array without changing it. i did const reversedArray = cid.slice().reverse(); and then i used the forEach method on the newly reversedArray variable reversedArray.forEach() that seem to work. now i have to figure out how to make the code check for each currency that has value

30

i can’t get pass step 16-19. I’m trying to get the bills that were used to give change to the customer to decrement but it seems i’m getting that wrong. the cid array doesn’t run out after giving change even tho i tried subtracting the amountCollected from the available amount if (amountCollected > 0) { const amount = Number((amountCollected * equivalentOfAmountInDrawer).toFixed(2)); changeArr.push([` ${coinName}: ` + `$${amount}` ]); availableAmount -= amountCollected; } i tried different approaches but i don’t just get it right. I really need help

31

The change in the drawer is kept in the cid variable, correct?

32

Yes it is and the amountAvailable is holding the elements in the index 0 of the cid array

33

Why is that? Isn’t the cid the amount of change available?

34

yes it is. But i used a variable totalAmountInDrawer (not amountAvailable sorry it was a mistake) to get the elements that are in the index 0 of the cid const reversedArray = cid.slice().reverse(); reversedArray.forEach((el) => { let coinName = el[0]; let totalAmountInDrawer = Number(el[1]); let equivalentOfAmountInDrawer = Number(currencyUnit[coinName]); let availableAmount = Number((totalAmountInDrawer / equivalentOfAmountInDrawer).toFixed(2)); let amountCollected = 0; after returning change i subtracted amountCollected from the totalAmoountinDrawer

35

From the instructions:

In the script.js file, you have been provided with the price and cid variables. The price variable is the price of the item, and the cid variable is the cash-in-drawer, which is a 2D array listing the available currency in the cash drawer.

The cid variable is the cash-in-drawer. If you are not changing the cid variable then the cash in the drawer is not changing.

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