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freecodecamp-projects/2-javascript-algorithms-datastructures/5-cash-register.js

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const valueMap = {
PENNY: 0.01,
NICKEL: 0.05,
DIME: 0.1,
QUARTER: 0.25,
ONE: 1,
FIVE: 5,
TEN: 10,
TWENTY: 20,
'ONE HUNDRED': 100,
}
function checkCashRegister(price, cash, cid) {
let changeDue = cash - price;
let totalCID = 0;
let change = [];
let status = "unknown";
if (cash > price ){
for (let i in cid){
totalCID = totalCID + cid[i][1];
}
if (totalCID < changeDue){
status = "INSUFFICIENT_FUNDS";
}
if (totalCID === changeDue){status = "CLOSED"; change = cid; changeDue = 0}
while (changeDue >= 0.01){
for (let i = 8; i >= 0; i--){
let value = valueMap[cid[i][0]];
let amount = cid[i][1]
let amountChange = 0;
while (changeDue >= value && amount > 0){
changeDue -= value;
amount -= value;
amountChange += value;
changeDue = Math.round(changeDue * 100) / 100;
} if (amountChange > 0 ){change.push([cid[i][0], amountChange])}
}
if (changeDue >=0.01){ status = "INSUFFICIENT_FUNDS"; change = []; break;}
status = "OPEN";
}
}
return {status: status, change: change};
}
let tests = [
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]]) === {status: "OPEN", change: [["QUARTER", 0.5]]},
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]]) === {status: "OPEN", change: [["TWENTY", 60], ["TEN", 20], ["FIVE", 15], ["ONE", 1], ["QUARTER", 0.5], ["DIME", 0.2], ["PENNY", 0.04]]},
checkCashRegister(19.5, 20, [["PENNY", 0.01], ["NICKEL", 0], ["DIME", 0], ["QUARTER", 0], ["ONE", 0], ["FIVE", 0], ["TEN", 0], ["TWENTY", 0], ["ONE HUNDRED", 0]]) === {status: "INSUFFICIENT_FUNDS", change: []},
checkCashRegister(19.5, 20, [["PENNY", 0.01], ["NICKEL", 0], ["DIME", 0], ["QUARTER", 0], ["ONE", 0], ["FIVE", 0], ["TEN", 0], ["TWENTY", 0], ["ONE HUNDRED", 0]]) === {status: "INSUFFICIENT_FUNDS", change: []},
checkCashRegister(19.5, 20, [["PENNY", 0.01], ["NICKEL", 0], ["DIME", 0], ["QUARTER", 0], ["ONE", 1], ["FIVE", 0], ["TEN", 0], ["TWENTY", 0], ["ONE HUNDRED", 0]]) === {status: "INSUFFICIENT_FUNDS", change: []},
checkCashRegister(19.5, 20, [["PENNY", 0.5], ["NICKEL", 0], ["DIME", 0], ["QUARTER", 0], ["ONE", 0], ["FIVE", 0], ["TEN", 0], ["TWENTY", 0], ["ONE HUNDRED", 0]]) === {status: "CLOSED", change: [["PENNY", 0.5], ["NICKEL", 0], ["DIME", 0], ["QUARTER", 0], ["ONE", 0], ["FIVE", 0], ["TEN", 0], ["TWENTY", 0], ["ONE HUNDRED", 0]]}
]