Help with JavaScript Algorithms and Data Structures Projects: Cash Register

Curriculum Help JavaScript
#1

I’ve spent the last few hours watching videos and reading others’ solutions to this problem, however I can’t figure out what I’m doing wrong with this code. I’ve been able to pass all but the last test, any advice would be much appreciated!

const REGISTER_STATUS = {
  closed: 'CLOSED',
  insufficientFunds: 'INSUFFICIENT_FUNDS',
  open: 'OPEN'
}

function checkCashRegister(price, cash, cid) {
  let cashRegister = { status: '', change: cid};
  const changeNeeded = parseFloat(cash - price).toFixed(2);
  const changeAvailable = getTotalCashRegisterChange(cid);
  cashRegister.status = getTotalCashRegisterStatus(changeNeeded, changeAvailable);

  if (cashRegister.status === REGISTER_STATUS.insufficientFunds) {
    cashRegister.change = [];

    return cashRegister
  }

  cashRegister.change = getCustomersChange(changeNeeded, cid);

  if (changeNeeded > getTotalCashRegisterChange(cashRegister.change)) {
    cashRegister.status = REGISTER_STATUS.insufficientFunds;
    cashRegister.change = []
  }

  if (cashRegister.status === REGISTER_STATUS.closed) {
    cashRegister.change = [...cid]
  }

  return cashRegister;
}

function getCustomersChange(changeNeeded, changeInDrawer) {
  const change = [];
  const currencyDictionary = {
    'ONE HUNDRED': 100.0,
    'TWENTY': 20.0,
    'TEN': 10.0,
    'FIVE': 5.0,
    'ONE': 1.0,
    'QUARTER': 0.25,
    'DIME': 0.10,
    'NICKEL': 0.05,
    'PENNY': 0.01
  }
  for (let i = changeInDrawer.length - 1; i >= 0; i--) {
    const coinName = changeInDrawer[i][0];
    const coinTotal = changeInDrawer[i][1];
    const coinValue = currencyDictionary[coinName];
    let coinAmount = (coinTotal / coinValue.toFixed(2));
    let coinsToReturn = 0;

    while (changeNeeded >= coinValue && coinAmount > 0) {
      changeNeeded -= coinValue;
      changeNeeded = changeNeeded.toFixed(2);
      coinAmount--;
      coinsToReturn++;
    }

    if (coinsToReturn > 0) {
      change.push([coinName, coinsToReturn * coinValue])
    }
  }

  return change
}

function getTotalCashRegisterStatus(changeNeeded, changeAvailable) {
  if (Number(changeNeeded) > Number(changeAvailable)) {
    return REGISTER_STATUS.insufficientFunds;
  }

  if (Number(changeAvailable) > Number(changeNeeded)) {
    return REGISTER_STATUS.open;
  }
  
  return REGISTER_STATUS.closed
}

function getTotalCashRegisterChange(changeInDrawer) {
  let total = 0;

  for (let change of changeInDrawer) {
    let changeValue = change[1];
    total += change[1];
  }
  return total.toFixed()
}

console.log(checkCashRegister(19.5, 20, [["PENNY", 0.5], ["NICKEL", 0], ["DIME", 0], ["QUARTER", 0], ["ONE", 0], ["FIVE", 0], ["TEN", 0], ["TWENTY", 0], ["ONE HUNDRED", 0]]))
1 Like
#2

It looks like on that last test it thinks your change available is 1, when it should be 0.5.

2 Likes
#3

Thanks! Helped me to pinpoint my issue.