EnumerationAutomation.swift

// 1. Before
static var titles: [String] {
    var i = 0
    var titles: [String] = []
    while let categoryTitle = StudyCategory(rawValue: i)?.title {
      titles.append(categoryTitle)
      i += 1 
    }
    return titles  
}

// 2. After
static var titles: [String] {
        
    let titles = ["General", "Mathematics", "Literature", "Science", "Biology", "Physics", "Business", "Music", "Economics", "Computer Science", "Languages", "Chemistry", "Geography", "Other", "Custom"]
    assert(StudyCategory(rawValue: titles.count == nil)
        //var i = 0
        //var titles: [String] = []
        //while let categoryTitle = StudyCategory(rawValue: i)?.title {
        //    titles.append(categoryTitle)
        //    i += 1
        //}
        return titles
}