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How do I write a failable initializer that takes parameters for start and end times and checks to see if they are greater than 15 seconds apart using a guard statement instead of the if statement I've used here and have the code running? struct Workout { let startTime:Double let endTime:Double init?(startTime:Double, endTime:Double) { if endTime-startTime <= 15 { return nil } self.startTime=startTime self.endTime=endTime } } let man1 = Workout(startTime:800,endTime:805) let man2 = Workout(startTime:800,endTime:900) print(man1) print(man2)

How do I write a failable initializer that takes parameters for start and end times and checks to see if they are greater than 15 seconds apart using a guard statement instead of the if statement I've used here and have the code running? struct Workout { let startTime:Double let endTime:Double init?(startTime:Double, endTime:Double) { if endTime-startTime <= 15 { return nil } self.startTime=startTime self.endTime=endTime } } let man1 = Workout(startTime:800,endTime:805) let man2 = Workout(startTime:800,endTime:900) print(man1) print(man2)

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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I'm coding using Swift language.

How do I write a failable initializer that takes parameters for start and end times and checks to see if they are greater than 15 seconds apart using a guard statement instead of the if statement I've used here and have the code running?

 

struct Workout

{    

    let startTime:Double

    let endTime:Double

    init?(startTime:Double, endTime:Double)

    {

        if endTime-startTime <= 15

        {

            return nil

        }

        self.startTime=startTime

        self.endTime=endTime       

    }

}

let man1 = Workout(startTime:800,endTime:805)

let man2 = Workout(startTime:800,endTime:900)

print(man1)

print(man2)

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