6.8 KiB
id | title | challengeType | forumTopicId | dashedName |
---|---|---|---|---|
aa2e6f85cab2ab736c9a9b24 | Cash Register | 5 | 16012 | cash-register |
--description--
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]
]
--hints--
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 an object.
assert.deepEqual(
Object.prototype.toString.call(
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]
])
),
'[object Object]'
);
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]]}
.
assert.deepEqual(
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]])
should return {status: "OPEN", change: [["TWENTY", 60], ["TEN", 20], ["FIVE", 15], ["ONE", 1], ["QUARTER", 0.5], ["DIME", 0.2], ["PENNY", 0.04]]}
.
assert.deepEqual(
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]])
should return {status: "INSUFFICIENT_FUNDS", change: []}
.
assert.deepEqual(
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]])
should return {status: "INSUFFICIENT_FUNDS", change: []}
.
assert.deepEqual(
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]])
should return {status: "CLOSED", change: [["PENNY", 0.5], ["NICKEL", 0], ["DIME", 0], ["QUARTER", 0], ["ONE", 0], ["FIVE", 0], ["TEN", 0], ["TWENTY", 0], ["ONE HUNDRED", 0]]}
.
assert.deepEqual(
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]
]
}
);
--seed--
--seed-contents--
function checkCashRegister(price, cash, cid) {
var change;
return 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]]);
--solutions--
var denom = [
{ name: 'ONE HUNDRED', val: 100},
{ name: 'TWENTY', val: 20},
{ name: 'TEN', val: 10},
{ name: 'FIVE', val: 5},
{ name: 'ONE', val: 1},
{ name: 'QUARTER', val: 0.25},
{ name: 'DIME', val: 0.1},
{ name: 'NICKEL', val: 0.05},
{ name: 'PENNY', val: 0.01}
];
function checkCashRegister(price, cash, cid) {
var output = {status: null, change: []};
var change = cash - price;
var register = cid.reduce(function(acc, curr) {
acc.total += curr[1];
acc[curr[0]] = curr[1];
return acc;
}, {total: 0});
if(register.total === change) {
output.status = 'CLOSED';
output.change = cid;
return output;
}
if(register.total < change) {
output.status = 'INSUFFICIENT_FUNDS';
return output;
}
var change_arr = denom.reduce(function(acc, curr) {
var value = 0;
while(register[curr.name] > 0 && change >= curr.val) {
change -= curr.val;
register[curr.name] -= curr.val;
value += curr.val;
change = Math.round(change * 100) / 100;
}
if(value > 0) {
acc.push([ curr.name, value ]);
}
return acc;
}, []);
if(change_arr.length < 1 || change > 0) {
output.status = 'INSUFFICIENT_FUNDS';
return output;
}
output.status = 'OPEN';
output.change = change_arr;
return output;
}