For Ruby Wednesday Sep 16, 2015

students.rb

# Fork this gist, then fill in the code with your answers.

# you teach an advanced mathematics class at the local university.
# Your class is very difficult, so all but three students have quit.
# The three students who remain are:
# jim, 22 years old
# caroline, age 21 years old
# jasmine, the 17 year old young genius

# to keep track of your students, you create a Student class:

class Student
  attr_accessor :name, :age

  def initialize(name:, age:)
    @name = name
    @age = age
  end
end

# then you create a list of all your students



students = [
  Student.new(name: 'jim', age: 22),
  ### TODO: fill in the blanks with the other two students
  Student.new(name: 'caroline', age: 21),
  Student.new(name: 'jasmine', age: 17)
]

# you want the list out all the names of your students with an easy command,
# so you create the names method

class Display

  def initialize(students)
    @students = students
  end

  def names
    names = []
    @students.each do |student|
      names << student.name.capitalize
    end
    puts names.join(", ")
  end

  def ages
    # you also want to list the ages of your students. fill in this method
    # so that it prints out all the ages of your students.
    # EXPECTED OUTPUT:
    # 22, 21, 17
  end

  def average_age
    # fill in this method with the code to print out the average age of the class
    # hint: try to use a different method than 'each' from the Enumerable class
    # hint: (or maybe a combination of methods)
    # EXPECTED OUTPUT:
    # average age of class: 20 years old
  end

  def student_info(student_name)
    # hint: you'll need to find the right student in the list of students,
    # then fetch that student's age as well.
    # EXPECTED OUTPUT, given a student_name of "jim":
    # Jim is 22 years old
  end
end

display = Display.new(students)

display.names
display.ages
display.average_age
display.student_info("jim")
display.student_info("jasmine")

## final output should be:

# Jim, Caroline, Jasmine
# 22, 21, 17
# average age of class: 20 years old
# Jim is 22 years old
# Jasmine is 17 years old


# when you finish, add a screenshot of the terminal output to your forked gist

Done :)