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cash-register.js
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cash-register.js
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const currencyUnit = {
"PENNY": 1,
"NICKEL": 5,
"DIME": 10,
"QUARTER": 25,
"ONE": 100,
"FIVE": 500,
"TEN": 1000,
"TWENTY": 2000,
"ONE HUNDRED": 10000
}
function checkCashRegister(price, cash, cid) {
let changeSum = cash * 100 - price * 100;
let changeSumCheck = changeSum;
let change = [];
let status = '';
let cidSum = 0;
let filteredCid = cid.filter(elem => elem[1] !== 0).reverse();
filteredCid.forEach(elem => {
let curr = elem[0];
let currSum = elem[1] * 100;
cidSum += currSum;
let amount = 0;
while (changeSum >= currencyUnit[curr] && currSum > 0) {
amount += currencyUnit[curr];
changeSum -= currencyUnit[curr];
currSum -= currencyUnit[curr];
}
if (amount !== 0) {
change.push([curr, amount / 100]);
}
});
if (changeSum > 0) {
status = 'INSUFFICIENT_FUNDS';
change = [];
} else if (changeSum == 0 && changeSumCheck == cidSum) {
status = 'CLOSED';
change = cid;
} else {
status = 'OPEN';
}
return { 'status': status, 'change': change };
}
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]]));