Instructions

You are a expert mixologist, making tasty drinks for the public to enjoy on their nights out. But you figured that you could make your life easier by writing a bit of code to help you with your job.

1. Determine how long it takes to make an order

Different drinks take different amount of time to prepare:

• "beer", "soda", and "water" take 0.5 minutes each.
• "shot"s take 1.0 minutes, "mixed drink"s take 1.5 minutes,
• "fancy drink"s take 2.5 minutes,
• "frozen drink"s take 3.0 minutes.

Implement the function timeToPrepare(drinks:), that takes the argument drinks which holds an array of strings representing the drinks that need to be prepared. The function should return the total time it will take to prepare all the drinks in the array.

2. Replenish your lime wedge supply

One of the first things you need to do when you start your shift is to make sure your little bin of lime wedges is full for the shift ahead. You will have different sizes of lime which will give different amount of wedges, you can get 6 wedges from a "small" lime, 8 wedges from a "medium" lime and 10 from a "large" lime.

While you still need more wedges and you still have more limes to cut up, take the first lime out of the array, and subtract the appropriate number of wedges from the amount you need. Keep going until you don't need any more wedges or you run out of limes.

Implement the function makeWedges(needed:limes:), that takes the arguments needed which holds the number of wedges you need to cut up, and limes which holds an array of strings representing the sizes of the limes you have available to cut up. The function should return the number of limes you cut up.

3. Finish up your shift

Congratulations! Your long work day is nearly done and you will soon be going home to work on your new app. But you still have a stream of drink orders to make before you can hand off the orders to the next shift and leave.

As long as you still have time left in your shift you are to make the first order in the Array and then remove that order from the array. You can then subtract the amount of time it took to prepare that order, according to your function timeToPrepare(drinks:) from the time left on your shift.

Implement the function finishShift(minutesLeft:remainingOrders:) which takes in the number of minutes left in your shift (guaranteed to be greater than 0), and a non-empty array of drink orders. The function should return the array of orders that you have not yet gotten to before the end of your shift.

4. Track certain orders

In order to make sure the beer and soda stay fresh, you need to track their orders along with the times those orders were placed.

Implement the function orderTracker(orders: [(drink: String, time: String)]) -> (beer: (first: String, last: String, total: Int)?, soda: (first: String, last: String, total: Int)?) which, when given a list of orders and times return a pair of optional tuples containing the times of the first and last orders of beer and soda along with the total number of orders of each and nil if no orders for those beverages were made. You do not need to track any other drinks.

Implement the function orderTracker(orders:) which takes in an array of tuples, where each tuples holds the drink ordered and the time the order was placed. The function should return a tuple containing the first and last time beer was ordered, the total number of beer orders, the first and last time soda was ordered, and the total number of soda orders. It should be returned as a tuple of the format: (beer: (first: String, last: String, total: Int)?, soda: (first: String, last: String, total: Int)?).