JavaScript Algorithms and Data Structures Projects - Cash Register

JavaScript
1

My code doesnt work. What am I doing wrong?

Your code so far

function checkCashRegister(price, cash, cid) {
  const currencyValues = {
    "PENNY": 0.01,
    "NICKEL": 0.05,
    "DIME": 0.1,
    "QUARTER": 0.25,
    "ONE": 1,
    "FIVE": 5,
    "TEN": 10,
    "TWENTY": 20,
    "ONE HUNDRED": 100
  };

  let changeDue = cash - price;
  let change = [];

  // Calculate total cash in drawer
  let totalInDrawer = cid.reduce((total, curr) => total + curr[1], 0);

  // Check if drawer has enough cash
  if (totalInDrawer < changeDue) {
    return {status: "INSUFFICIENT_FUNDS", change: []};
  }

  // Check if drawer has exact change
  if (totalInDrawer === changeDue) {
    return {status: "CLOSED", change: cid};
  }

  // Iterate over currency denominations in reverse order
  for (let i = cid.length - 1; i >= 0; i--) {
    let denomination = cid[i][0];
    let denominationValue = currencyValues[denomination];
    let denominationCount = Math.floor(cid[i][1] / denominationValue);
    let amountToReturn = 0;

    // Calculate how much of this denomination to return
    while (changeDue >= denominationValue && denominationCount > 0) {
      changeDue = parseFloat((changeDue - denominationValue).toFixed(2));
      amountToReturn += denominationValue;
      denominationCount--;
    }

    // Add denomination to change array if it was used
    if (amountToReturn > 0) {
      change.push([denomination, amountToReturn]);
    }
  }

  // Check if change could not be made with exact denominations
  if (changeDue > 0) {
    return {status: "INSUFFICIENT_FUNDS", change: []};
  }

  // Return the change array
  return {status: "OPEN", change: change};
}


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]]);

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Challenge: JavaScript Algorithms and Data Structures Projects - Cash Register

Link to the challenge:

2

Can you provide some more details about what’s happening?

3

Your code is passing for me.

Copy it and reset the challenge, then paste the code back in.

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