Cash Register Error

Curriculum Help
1

I receive the following errors with the code below:

  • checkCashRegister(19.5, 20, [["PENNY", 1.01], ["NICKEL", 2.05], ["DIME", 3.1], ["QUARTER", 4.25], ["ONE", 90], ["FIVE", 55], ["TEN", 20], ["TWENTY", 60], ["ONE HUNDRED", 100]]) should return {status: "OPEN", change: [["QUARTER", 0.5]]}.

  • Failed:checkCashRegister(3.26, 100, [["PENNY", 1.01], ["NICKEL", 2.05], ["DIME", 3.1], ["QUARTER", 4.25], ["ONE", 90], ["FIVE", 55], ["TEN", 20], ["TWENTY", 60], ["ONE HUNDRED", 100]]) should return {status: "OPEN", change: [["TWENTY", 60], ["TEN", 20], ["FIVE", 15], ["ONE", 1], ["QUARTER", 0.5], ["DIME", 0.2], ["PENNY", 0.04]]}.

`function checkCashRegister(price, cash, cid) {
  const currencyUnit = [
    ["PENNY", 0.01],
    ["NICKEL", 0.05],
    ["DIME", 0.10],
    ["QUARTER", 0.25],
    ["ONE", 1.00],
    ["FIVE", 5.00],
    ["TEN", 10.00],
    ["TWENTY", 20.00],
    ["ONE HUNDRED", 100.00]
  ];

  let changeDue = cash - price;
  let totalCid = cid.reduce((acc, curr) => acc + curr[1], 0);

  if (totalCid < changeDue) {
    return { status: "INSUFFICIENT_FUNDS", change: [] };
  } else if (totalCid === changeDue) {
    return { status: "CLOSED", change: cid };
  } else {
    let changeArr = [];
    cid = cid.reverse();

    for (let i = 0; i < currencyUnit.length; i++) {
      let unitName = currencyUnit[i][0];
      let unitValue = currencyUnit[i][1];
      let unitTotal = cid[i][1];
      let amountToReturn = 0;

      while (changeDue >= unitValue && unitTotal >= unitValue) {
        amountToReturn += unitValue;
        changeDue -= unitValue;
        changeDue = Math.round(changeDue * 100) / 100; // Fix to 2 decimal places
        unitTotal -= unitValue;
      }

      if (amountToReturn > 0) {
        changeArr.push([unitName, amountToReturn]);
      }
    }

    if (changeDue > 0) {
      return { status: "INSUFFICIENT_FUNDS", change: [] };
    } else {
      return { status: "OPEN", change: changeArr };
    }
  }
}

// Example usage:
console.log(checkCashRegister(19.5, 20, [
  ["PENNY", 1.01],
  ["NICKEL", 2.05],
  ["DIME", 3.1],
  ["QUARTER", 4.25],
  ["ONE", 90],
  ["FIVE", 55],
  ["TEN", 20],
  ["TWENTY", 60],
  ["ONE HUNDRED", 100]
]));

console.log(checkCashRegister(3.26, 100, [
  ["PENNY", 1.01],
  ["NICKEL", 2.05],
  ["DIME", 3.1],
  ["QUARTER", 4.25],
  ["ONE", 90],
  ["FIVE", 55],
  ["TEN", 20],
  ["TWENTY", 60],
  ["ONE HUNDRED", 100]
]));
`
2

Please Tell us what’s happening in your own words.

Learning to describe problems is hard, but it is an important part of learning how to code.

Also, the more you say, the more we can help!

3

I’m trying to pass the final freeCodeCamp Javascript challenge with that gives the following instructions:

Cash Register

Design a cash register drawer function checkCashRegister() that accepts purchase price as the first argument (price), payment as the second argument (cash), and cash-in-drawer (cid) as the third argument.

cid is a 2D array listing available currency.

The checkCashRegister() function should always return an object with a status key and a change key.

Return {status: "INSUFFICIENT_FUNDS", change: []} if cash-in-drawer is less than the change due, or if you cannot return the exact change.

Return {status: "CLOSED", change: [...]} with cash-in-drawer as the value for the key change if it is equal to the change due.

Otherwise, return {status: "OPEN", change: [...]}, with the change due in coins and bills, sorted in highest to lowest order, as the value of the change key.

Currency Unit Amount
Penny $0.01 (PENNY)
Nickel $0.05 (NICKEL)
Dime $0.1 (DIME)
Quarter $0.25 (QUARTER)
Dollar $1 (ONE)
Five Dollars $5 (FIVE)
Ten Dollars $10 (TEN)
Twenty Dollars $20 (TWENTY)
One-hundred Dollars $100 (ONE HUNDRED)

See below for an example of a cash-in-drawer array:

[
  ["PENNY", 1.01],
  ["NICKEL", 2.05],
  ["DIME", 3.1],
  ["QUARTER", 4.25],
  ["ONE", 90],
  ["FIVE", 55],
  ["TEN", 20],
  ["TWENTY", 60],
  ["ONE HUNDRED", 100]
]
4

The code gives the following errors when it’s being run:

  • checkCashRegister(19.5, 20, [["PENNY", 1.01], ["NICKEL", 2.05], ["DIME", 3.1], ["QUARTER", 4.25], ["ONE", 90], ["FIVE", 55], ["TEN", 20], ["TWENTY", 60], ["ONE HUNDRED", 100]]) should return {status: "OPEN", change: [["QUARTER", 0.5]]}.
  • Failed:checkCashRegister(3.26, 100, [["PENNY", 1.01], ["NICKEL", 2.05], ["DIME", 3.1], ["QUARTER", 4.25], ["ONE", 90], ["FIVE", 55], ["TEN", 20], ["TWENTY", 60], ["ONE HUNDRED", 100]]) should return {status: "OPEN", change: [["TWENTY", 60], ["TEN", 20], ["FIVE", 15], ["ONE", 1], ["QUARTER", 0.5], ["DIME", 0.2], ["PENNY", 0.04]]}.
5

Print the tests yourself and see what your function returns. That will help you figure out what’s wrong

console.log(  
  checkCashRegister(3.26, 100, [["PENNY", 1.01], ["NICKEL", 2.05], ["DIME", 3.1], ["QUARTER", 4.25], ["ONE", 90], ["FIVE", 55], ["TEN", 20], ["TWENTY", 60], ["ONE HUNDRED", 100]])
)
6

You don’t need to copy-paste the instructions. You should talk more about how you’re stuck debugging and what you’ve tried so far.