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
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
Problem 1PE
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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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