App Exercise - Workout or Nil | Note These exercises reinforce Swift concepts in the context of a fitness tracking app. Have you ever accidentally tapped a button in an app? It's fairly common. In your fitness tracking app, you decide that if a user accidentally taps a button to start a workout and then ends the workout within 10 seconds, you simply don't want to create and log the workout. Otherwise the user would have to go delete the workout from the log. Create a Workout struct that has properties startTime and endTime of type Double. Dates are difficult to work with, so you'll be using doubles to represent the number of seconds since midnight, i.e. 28800 would represent 28,800 seconds, which is exactly 8 hours, so the start time is 8am. Write a failable initializer that takes parameters for your start and end times, and then checks to see if they are fewer than 10 seconds apart. If they are, your initializer should fail. Otherwise, they should set the properties accordingly. Try to initialize two instances of a Workout object. Unwrap each of them and print its properties. One of them should not be initialized because the start and end times are too close together. The other should successfully initialize a Workout object.
App Exercise - Workout or Nil | Note These exercises reinforce Swift concepts in the context of a fitness tracking app. Have you ever accidentally tapped a button in an app? It's fairly common. In your fitness tracking app, you decide that if a user accidentally taps a button to start a workout and then ends the workout within 10 seconds, you simply don't want to create and log the workout. Otherwise the user would have to go delete the workout from the log. Create a Workout struct that has properties startTime and endTime of type Double. Dates are difficult to work with, so you'll be using doubles to represent the number of seconds since midnight, i.e. 28800 would represent 28,800 seconds, which is exactly 8 hours, so the start time is 8am. Write a failable initializer that takes parameters for your start and end times, and then checks to see if they are fewer than 10 seconds apart. If they are, your initializer should fail. Otherwise, they should set the properties accordingly. Try to initialize two instances of a Workout object. Unwrap each of them and print its properties. One of them should not be initialized because the start and end times are too close together. The other should successfully initialize a Workout object.
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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App Exercise - How do I do this practice exercise using Swift code? Please find an image attached.
Transcribed Image Text:App Exercise - Workout or Nil
Note
These exercises reinforce Swift concepts in the context of a fitness tracking app.
Have you ever accidentally tapped a button in an app? It's fairly common. In your fitness tracking app, you decide that if a user accidentally taps a button to start a workout and then ends the
workout within 10 seconds, you simply don't want to create and log the workout. Otherwise the user would have to go delete the workout from the log.
Create a Workout struct that has properties startTime and endTime of type Double. Dates are difficult to work with, so you'll be using doubles to represent the number of seconds since
midnight, i.e. 28800 would represent 28,800 seconds, which is exactly 8 hours, so the start time is 8am.
Write a failable initializer that takes parameters for your start and end times, and then checks to see if they are fewer than 10 seconds apart. If they are, your initializer should fail. Otherwise, they
should set the properties accordingly.
Try to initialize two instances of a Workout object. Unwrap each of them and print its properties. One of them should not be initialized because the start and end times are too close together. The
other should successfully initialize a Workout object.
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