Students

class Student{
    let name: String
    let grade: Int

    init(name: String, grade: Int) {
        self.name = name
        self.grade = grade
    }
}
    func filterStudents(students: [Student], closure: (Student) -> Bool) -> [Student] {
        var filteredStudents: [Student] = []
        for student in students {
            if closure(student) {
                filteredStudents.append(student)
            }
        }
        return filteredStudents
    }




let students  = [Student(name: "Gvantsa", grade: 100),          Student(name: "Sofo", grade: 98),
                 Student(name: "Gio", grade: 40),
                 Student(name: "Deme", grade: 88)]

let passExamClosure: (Student) -> Bool = { student in
    return student.grade >= 51
}


var filteredStudents = filterStudents(students: students, closure: passExamClosure)

//for passStudent in filteredStudents {
//    print(passStudent.name)
//}

//2
func sortStudents(students: [Student], closure: (Student, Student) -> Bool) -> [Student] {
    return students.sorted(by: closure)
}

let sortByGradesClosure: (Student, Student) -> Bool = { student1, student2 in return student1.grade > student2.grade }

var sortGradesStudents = sortStudents(students: students, closure: sortByGradesClosure)

for student in sortGradesStudents {
    print(student.name)
}