Added Roster.swift

Author: adistasicc

5-arrays-and-sets/morse-decoder/Morse.swift

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+// File Name: Roster.swift
+// Author: Alex DiStasi
+// Date: 3/3/2020
+
+var spanish101: Set = ["Angela", "Declan", "Aldany", "Alex", "Sonny", "Alif", "Skyla"]
+var german101: Set = ["Angela", "Alex", "Declan", "Kenny", "Cynara", "Adam"]
+var advancedCalculus: Set = ["Cynara", "Gabby", "Angela", "Samantha", "Ana", "Aldany", "Galina", "Jasmine"]
+var artHistory: Set = ["Samantha", "Vanessa", "Aldrian", "Cynara", "Kenny", "Declan", "Skyla"]
+var englishLiterature: Set = ["Gabby", "Jasmine", "Alex", "Alif", "Aldrian", "Adam", "Angela"]
+var computerScience: Set = ["Galina", "Kenny", "Sonny", "Alex", "Skyla"]
+
+// Write your code below 🍎
+
+// Task Group: Creating a Roster of All Students
+// Create a set of all students enrolled in at least 1 class
+var allStudents = spanish101.union(german101)
+allStudents = allStudents.union(advancedCalculus)
+allStudents = allStudents.union(artHistory)
+allStudents = allStudents.union(englishLiterature)
+allStudents = allStudents.union(computerScience)
+
+// Print each student Name
+for student in allStudents {
+  print(student)
+}
+
+// Print the total number of students
+print("Total number of students: \(allStudents.count)")
+
+
+
+// Task Group: Language Classes
+
+// Students taking no language class
+var spanishAndGerman = spanish101.union(german101)
+var noLanguages = allStudents.subtracting(spanishAndGerman)
+print("Students taking no languages: \(noLanguages)")
+
+// Students taking Spanish101 OR German101, but not both
+var oneLanguage = spanish101.symmetricDifference(german101)
+print("Students taking only one lanuage: \(oneLanguage)")
+
+// Students taking Spanish101, German101, and English Literature
+var languageAwardWinners = spanish101.intersection(german101).intersection(englishLiterature)
+print("Language award winners: \(languageAwardWinners)")
+
+
+
+// Task Group: Class Size
+
+var sevenPlus = 0
+
+// Create a set that contains sets 
+var classSet: Set = [spanish101, german101, englishLiterature, computerScience, artHistory, advancedCalculus]
+
+// Loop through classSet to find which sets have >= 7 students
+for aClass in classSet {
+  if aClass.count >= 7 {
+    sevenPlus += 1
+  }
+}
+print ("There are \(sevenPlus) classes with seven or more students.")
+