Tell us what’s happening:
I have this cash register answer but for some reason the last two tests aren’t passing.
Your code so far
const INSUFFICIENT_FUNDS = { status: 'INSUFFICIENT_FUNDS', change: [] };
const CLOSED_CID = { status: 'CLOSED', change: [] };
const POSITION_CID = [
['ONE HUNDRED', 100],
['TWENTY', 20],
['TEN', 10],
['FIVE', 5],
['ONE', 1],
['QUARTER', 0.25],
['DIME', 0.1],
['NICKEL', 0.05],
['PENNY', 0.01]
];
const add = (a, b) => a + b[1];
const checkCashRegister = (price, cash, cid) => {
let finalChange = [];
let changeDue = cash - price;
const cidSum = cid.reduce(add, 0).toFixed(2);
/*
If there is exactly enough money to provide change, the
status key is “CLOSED”, and the change key is our
cash-in-drawer(cid).
*/
if (cidSum == changeDue) {
return { CLOSED_CID, change: cid };
}
/*
If there is not enough money to provide change, the status key
is “INSUFFICIENT_FUNDS” and the change key is an empty array.
*/
if (cidSum < changeDue) {
return INSUFFICIENT_FUNDS;
}
/*
If there is enough money to provide change with money still
left in the drawer, the change is then provided by going down
a list of currency units from high to low, pushing them to
the change array, and subtracting them from both the cash
owed and the cash-in-drawer(cid).
*/
let cidReverse = cid.reverse();
POSITION_CID.map((posCid, index) => {
const billValue = posCid[1];
while (changeDue >= billValue && cidReverse[index][1] >= billValue) {
changeDue -= billValue; // minus change due from bill value
changeDue = changeDue.toFixed(2); // fix rounding errors
const hasBillValueAlready = finalChange.filter(p => p[0] === cidReverse[index][0]);
if (hasBillValueAlready.length > 0) {
finalChange = finalChange.map(k => (k[0] === posCid[0] && [k[0], (k[1] += billValue)]) || [k[0], k[1]]);
} else {
finalChange.push([cidReverse[index][0], billValue]);
}
cidReverse[index][1] -= billValue; // minus bill value from cash-in-drawer
}
});
if (changeDue !== 0) {
return { status: 'OPEN', change: finalChange };
} else {
return INSUFFICIENT_FUNDS;
}
};
const price = 19.5;
const cash = 200;
const cid = [
['PENNY', 1.01],
['NICKEL', 2.05],
['DIME', 3.1],
['QUARTER', 4.25],
['ONE', 90],
['FIVE', 55],
['TEN', 20],
['TWENTY', 60],
['ONE HUNDRED', 100]
];
// checkCashRegister(price, cash, cid);
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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