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Answers for the Ruby Review
# # Question 1: Write a program that takes user input for their name and passes
# # it to a method as an argument and then displays it into the following
# # concatenated string:
# # "Hello (name). Nice to meet you."
# puts "What is your name?"
# user_name = gets.chomp
# def greeting name
# puts "Hello #{name}. Nice to meet you."
# end
# greeting(user_name)
# ------------------------------------------------------------------------------
# # Question 2: Correct the code below so it displays the sum of x, y, and z:
# def sum_numbers(x,y,z)
# x+y+z
# end
# puts sum_numbers(1, 2, 3)
# ------------------------------------------------------------------------------
# # Question 3: Add to the code below so it displays "Don't forget to (to do item)." for each item.
# to_do = ["wash the car", "buy groceries", "finish homework", "pay the bills"]
# to_do.each { |item| puts "Don't forget to #{item}!"}
# ------------------------------------------------------------------------------
# # Question 4: Without running the code, what do you think is the return value
# # of the following?
# # Answer: 16 because in Ruby, the last line of the method is what the method
# # returns, in this case, c + d which is 6 + 10.
# def avg(a, b, c, d)
# total =a + b + c + d
# avg = total / 4
# c + d
# end
# puts avg(5, 8, 6, 10)
# ------------------------------------------------------------------------------
# # Question 5: Without running the code, what is the return value of the following?
# # Answer: Sarah (remember zero-based indexing of arrays)
# names = ['David', 'Trevor', 'Sarah', 'Mason']
# puts names[2]
# ------------------------------------------------------------------------------
# # Question 6: How do you add "bobcat" to this list of wild cat species?
# wild_cats= ['cheetah', 'lion', 'leopard', 'tiger']
# wild_cats.push('bobcat')
# puts wild_cats
# ------------------------------------------------------------------------------
# # Question 7: How do you retrieve the birthplace of user1?
# user1= {:firstname=> "Johnny", :lastname => "Begood",
# :gender => "male", :dob => "08/21/1981",
# :birthplace => "Seattle, WA"}
# puts user1[:birthplace]
# ------------------------------------------------------------------------------
# Question 8: How do you add "Atlanta, GA " as the current city for user1 in
# the hash from the last question?
# user1[:current_city] = "Atlanta, GA"
# puts user1
# ------------------------------------------------------------------------------
# # Question 9: How would you retrieve "y" in the following array?
# alpha_soup= ["c", "k", "y", "u"]
# puts alpha_soup[2]
# ------------------------------------------------------------------------------
# # Question 10: How would you retrieve "14" in the following hash?
# alphabits= {"d" =>4, "k" => 14, "u" => 52}
# puts alphabits["k"]
# ------------------------------------------------------------------------------
# # Question 11: Write a loop that continues to display random numbers between 1
# # and 10 until the number generated is 7.
# i = 1
# until i == 7
# i = rand(9) + 1
# puts i
# end
# ------------------------------------------------------------------------------
# # Question 12: Continuing from question 11 above, push each randomly generated
# # number to an array. Then use an each loop and a conditional statement inside
# # to display the total amount of numbers that are under 6. Then display a
# # statement that reads: "There are (total) numbers under 6.”
# i = 1
# numbers = []
# until i == 7
# i = rand(9) + 1
# numbers.push(i)
# puts i
# end
# count = 0
# numbers.each do |number|
# if number < 6
# count += 1
# end
# end
# puts "There are #{count} numbers under 6."
# ------------------------------------------------------------------------------
# Question 13: Write code to create a new instance of a Vehicle object and make
# it honk.
class Vehicle
def initialize(color, type)
@color = color
@type = type # car, truck, motorcycle, scooter, van
# Added this code just for kicks
puts "I'm a new #{@color} #{@type}."
end
def honk
puts "Beep!"
end
end
my_car = Vehicle.new("blue", "convertible")
my_car.honk
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