This exercise is intended to help you assess your progress with the concepts and techniques we've covered during the week.
When complete, fill out this form.
For these questions, write a short snippet of code that meets
the requirement. In cases where the question mentions a "given"
data value, use the variable given to refer to it (instead of re-writing
the information).
class PizzaOven def cook_pizza "mmm 'za" end end
2. Define a class called Student which is instantiated with a "name" value and which has a method name that returns this value
class Student def initialize(name) @name = name end
def show_name @name end
numbers = [1,2,3,4,5] doubles = numbers.map do |number| number * 2 end
sum = doubles.inject(:+) puts sum
(You run this inside of the directory in terminal) git init
Given a hypothetical Pizza class which has an instance method is_tasty? that always
returns true, write a simple Minitest test that tests this behavior.
gem 'minitest', '~> 5.0' require 'minitest/autorun' require 'minitest/pride' require_relative 'pizza.rb'
class PizzaTest < Minitest::Test def test_it_is_tasty pizza = Pizza.new("true") assert_equal true, pizza.is_tasty? end end
class Pizza attr_reader @tasty
def initialize(tasty) @tasty = true end def is_tasty? true end end
Suppose the Pizza class also has a method style which randomly returns one of:
"supreme", "mediterranean", or "cheese". Write a test that confirms that the
returned pizza style is within this list.
GO BACK TO THIS ONE
git status git add filename.txt git status git commit -m "comments about the file to be committed" git status
Define a Student class which, when created, has an attitude attribute.
attitude should start out with the value "cheerful", and the Student class should
provide a "reader" method that allows us to access the value of its attitude.
Additionally, add an assign_homework method to Student. When assigned_homework is
invoked, if the student's attitude is "cheerful", it should become "dubious". If
the value is currently "dubious" it should become "perturbed". If the value is currently
"perturbed", it should become "dazed". Assigning homework to a "dazed" student has no
effect.
NOTE: I know that this does not work fully, but i think it is on the right path. I will redo it after the review.
class Student attr_reader :attitude def initialize(attitude = "cheerful") @attitude = attitude end
def assign_homework if @attitude attitude = "dubious" elsif @attitude == "dubious" attitude = "perturbed" elsif @attitude == "perturbed" attitude = "dazed" else attitute = "dazed end end
end
Building on the Student class from the previous example, update the assign_homework method
to accept an argument. The argument will be a String containing a short description of the
assignment. For example we might use it like this:
s = Student.new
s.assign_homework("Write a linked list")Then, add an assignments method to Student. assignments should return a list of
all the assignments that have been given, separated by a comma and a space. For example:
s = Student.new
s.attitude
=> "cheerful"
s.assign_homework("write a linked list")
s.attitude
=> "dubious"
s.assign_homework("write a BST")
s.attitude
=> "perturbed"
s.assignments
=> "write a linked list, write a BST"Create a new class SurlyStudent which inherits from the Student class above.
However, whenever you ask a SurlyStudent for their attitude, they always respond
with "disgruntled"
For example:
s1 = Student.new
s2 = Student.new
s3 = Student.new
s1.assign_homework("linked list")
s1.assign_homework("sorting algos")
s2.assign_homework("write a c compiler")
s2.assign_homework("write a pacman game")
s3.assign_homework("headcount")
s3.assign_homework("sales engine")
students = [s1,s2,s3]
# YOUR CODE HERE
=> "linked list, sorting algos, write a c compiler, write a pacman game, headcount, sales engine"