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110 lines
2.5 KiB
Markdown
110 lines
2.5 KiB
Markdown
---
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id: 699c8e045ee7cb94ed2322d6
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title: "Challenge 215: Parking Fee Calculator"
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challengeType: 28
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dashedName: challenge-215
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---
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# --description--
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Given two strings representing the time you parked your car and the time you picked it up, calculate the parking fee.
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- The given strings will be in the format `"HH:MM"` using a 24-hour clock. So `"14:00"` is 2pm for example.
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- The first string will be the time you parked your car, and the second will be the time you picked it up.
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- If the pickup time is earlier than the entry time, it means the parking spanned past midnight into the next day.
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Fee rules:
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- Each hour parked costs $3.
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- Partial hours are rounded up to the next full hour.
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- If the parking spans overnight (past midnight), an additional $10 overnight fee is applied.
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- There is a minimum fee of $5 (only used if the total would be less than $5).
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Return the total cost in the format `"$cost"`, `"$5"` for example.
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# --hints--
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`calculateParkingFee("09:00", "11:00")` should return `"$6"`.
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```js
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assert.equal(calculateParkingFee("09:00", "11:00"), "$6");
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```
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`calculateParkingFee("10:00", "10:30")` should return `"$5"`.
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```js
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assert.equal(calculateParkingFee("10:00", "10:30"), "$5");
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```
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`calculateParkingFee("08:10", "10:45")` should return `"$9"`.
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```js
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assert.equal(calculateParkingFee("08:10", "10:45"), "$9");
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```
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`calculateParkingFee("14:40", "23:10")` should return `"$27"`.
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```js
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assert.equal(calculateParkingFee("14:40", "23:10"), "$27");
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```
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`calculateParkingFee("18:15", "01:30")` should return `"$34"`.
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```js
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assert.equal(calculateParkingFee("18:15", "01:30"), "$34");
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```
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`calculateParkingFee("11:11", "11:10")` should return `"$82"`.
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```js
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assert.equal(calculateParkingFee("11:11", "11:10"), "$82");
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```
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# --seed--
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## --seed-contents--
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```js
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function calculateParkingFee(parkTime, pickupTime) {
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return parkTime;
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}
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```
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# --solutions--
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```js
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function calculateParkingFee(parkTime, pickupTime) {
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function toMinutes(time) {
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const [hours, minutes] = time.split(":").map(Number);
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return hours * 60 + minutes;
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}
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const entryMinutes = toMinutes(parkTime);
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const exitMinutes = toMinutes(pickupTime);
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let totalMinutes;
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let overnight = false;
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if (exitMinutes < entryMinutes) {
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overnight = true;
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totalMinutes = (24 * 60 - entryMinutes) + exitMinutes;
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} else {
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totalMinutes = exitMinutes - entryMinutes;
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}
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const hours = Math.ceil(totalMinutes / 60);
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let cost = hours * 3;
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if (overnight) {
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cost += 10;
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}
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if (cost < 5) {
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cost = 5;
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}
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return `$${cost}`;
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}
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```
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