Swift display previous entered item in array - arrays

Question

I am trying to display the pervious entered exercise attributes in the current workout. If I go to the pervious workout everything shows up but when I go to my current workout the previous exercise attributes don't show and the date label only shows today's date and not the previous workout date. Here are the two functions for the issue. Let me know if i need to post more.
func lastWorkout() -> Workout? {
if let client = currentClient(), let currentWorkout = currentWorkout(), let workouts = client.workouts as? Set<Workout> {
// get all this client's workouts in cronological order
let sortedWorkouts = workouts.sorted { (one, two) -> Bool in
let scheduledTimeOfOne = one.appointment?.scheduled ?? Date(timeIntervalSince1970: 0)
let scheduledTimeOfTwo = two.appointment?.scheduled ?? Date(timeIntervalSince1970: 0)
return scheduledTimeOfOne > scheduledTimeOfTwo
}
// get the index of this workout
let indexOfTodaysWorkout = sortedWorkouts.index(of: currentWorkout) ?? 0
// go back one workout to find the last workout completed
let lastWorkout: Workout? = (indexOfTodaysWorkout - 1) < 0 ? nil : sortedWorkouts[indexOfTodaysWorkout - 1]
// and return
return lastWorkout
}
return nil
}
/// Last Exercise Info to load previous exercise data
func lastExercise() -> Exercise? {
guard let selectedExercise = currentExerciseInfo() else{
return nil
}
if let exercises = lastWorkout()?.exercises as? Set<Exercise>, let pastExercise = exercises.first(where: { $0.exerciseInfo == selectedExercise }) {
return pastExercise
}
return nil
}

Answer 1

So the array count was off in last workout function. Here is what the working function looks like. I am still not displaying the proper date. it just gives today's date.
func lastWorkout() -> Workout? {
if let client = currentClient(), let currentWorkout = currentWorkout(), let workouts = client.workouts as? Set<Workout> {
// get all this client's workouts in cronological order
let sortedWorkouts = workouts.sorted { (one, two) -> Bool in
let scheduledTimeOfOne = one.appointment?.scheduled ?? Date(timeIntervalSince1970: 0)
let scheduledTimeOfTwo = two.appointment?.scheduled ?? Date(timeIntervalSince1970: 0)
return scheduledTimeOfOne > scheduledTimeOfTwo
}
// get the index of this workout
let indexOfTodaysWorkout = sortedWorkouts.index(of: currentWorkout) ?? 0
// go back one workout to find the last workout completed
let lastWorkout: Workout? = sortedWorkouts.count < 2 ? nil : sortedWorkouts[indexOfTodaysWorkout + 1]
// and return
return lastWorkout
}
return nil
}