Student Ruby Assessment

Instructions

Create a file with "<yourName>_assessment.rb".

Sections 1-6

Title each section with a comment that includes the name and number of each section.
Then write the ruby that fulfills each lettered instruction under the title. There is no need to structure your code based on the lettered instructions.
If you need to use code from a previous numbered section please cut and paste into the approrpriate section.

tl;dr: Your deliverable should be structured based on the numbered sections, not the lettered sections.

Section 7

Please use the letters and answer each lettered question individually.

EXAMPLE:

NB. this is in javascript so if you copy it, you will not be correct.

 //AshleyWilliams_assessment.js
 //1. Arrays
 var my_array = ["Blake","Ashley","Jeff"];
 my_array.push("Avi");
 for(var i=0; i<my_array.length; i++){
  console.log(my_array[i]);   
 }
 console.log(my_array[1]);
 var index = my_array.indexOf("Jeff");
 
 //2. Hashes
 instructor = {"name": "Ashley", "age": 27};
 for(i in instructor){
  console.log(i + ": " + instructor[i]);
 }
 //.... etc etc
 
 //...
 //7. Self
 // a. Arrararrr Syntax error cuz i'm taking this is JS and not ruby
 //.... etc etc

Questions

Questions should be answered with the simplest, most barebone solution possible.

###1. Arrays

array = ["Blake","Ashley","Jeff"]

a. Add a element to an array

b. Write a statement to print out all the elements of the array. This should not be just puts my_hash but should iterate over the structure printing each value.

c. Return the value at index 1.

d. Return the index for the value "Jeff".

###2. Hashes

instructor = {:name=>"Ashley", :age=>27}

a. Add a new key for location and give it the value "NYC".

b. Write a statement to print out all the key/value pairs in the hash. This should not be just puts my_hash but should iterate over the structure printing each individual key and value.

c. Return the name value from the hash.

d. Return the key name for the value 27.

###3. Nested Structures

school = { 
:name => "Happy Funtime School",
:location => "NYC",
:instructors => [ 
  {:name=>"Blake", :subject=>"being awesome" },
  {:name=>"Ashley", :subject=>"being better than blake"},
  {:name=>"Jeff", :subject=>"karaoke"}
],
:students => [ 
  {:name => "Marissa", :grade => "B"},
  {:name=>"Billy", :grade => "F"},
  {:name => "Frank", :grade => "A"},
  {:name => "Sophie", :grade => "C"}
]
}

a. Add a key to the school hash called "founded_in" and set it to the value 2013.

b. Add a student to the school's students' array.

c. Remove "Billy" from the students' array. Create a solution that would work for any name given, then give it the name "Billy".

d. Add a key to every student in the students array called "semester" and assign it the value "Summer".

e. Change Ashley's subject to "being almost better than Blake". Create a solution that would work for any teacher given, then give it the teacher "Ashley".

f. Change Frank's grade from "A" to "F". Create a solution that would work for any intial and replacement grade given, then give it the grades and "A" and "F".

g. Return the name of the student with a "B". Create a solution that would work for any grade given, then give it the grade "B".

h. Return the subject of the instructor "Jeff". Create a solution that would work for any instructor given, then give it the instructor "Jeff" and the new subject.

i. Write a statement to print out all the values in the school. This should not be just puts my_hash but should iterate over the structure printing each individual key and value.

###4. Methods

Note: You will need to pass the school variable to each of these methods to include it in scope.

a.
i. Create a method to return the grade of a student, given that student's name. ii. Then use it to refactor your work in 3.i., i.e. use your method to replace some of the iteration that was initiailly required.

b. i.Create a method to udpate a instructor's subject given the instructor and the new subject. ii. Then use it to update Blake's subject to "being terrible".

c. i. Create a method to add a new student to the schools student array. ii. Then use it to add yourself to the school students array.

d. i. Create a method that adds a new key at the top level of the school hash, given a key and a value. ii. Then use it to add a "Ranking" key with the value 1.

###5. Object Orientation

a. Create a bare bones class definition for a School class.

b. Define an initialize method for the School class.

i. Give your School class the instance variables: name, location, ranking, students, instructors. NOTE: These variables should be of the same type as they are in the hash above.

ii. Rewrite your initialize method definition to take a parameter for each instance variable.

iii. Initialize each instance variable with the value of the corresponding parameter.

c. Create an attr_accessor for name, location, instructors, and students. Create an attr_reader for ranking.

d. Create a method to set ranking, given a ranking value.

e. Create a method to add a student to the school, given a name, a grade, and a semester.

f. Create a method to remove a student from the school, given a name.

g. Create an array constant SCHOOLS that stores all instances of your School class.

h. Create a class method reset that will empty the SCHOOLS constant.

###6. Classes

a. Create a Student class.

b. Refactor your School instance methods to treat Students as an array of objects instead of an array of hashes.

c. Create a method in the School class that finds a student by name and returns the correct Student object.

###7. Self

For this section, please use the letters and answer each individually.

Note: in cases where self is an instance of an object just note that as the object id printed to the screen is going to be different everytime

a.What should this Class print to the screen when defined/loaded?

class Student

  def self.say_hello
    puts "hello"
  end

  say_hello
  puts self

end

b. What should this Class print to the screen when defined/loaded?

class Student

  def self.say_hello
    puts self
  end

  say_hello

end

c. What should this Class print to the screen when defined/loaded?

class Student

  def initialize
    puts self
  end

  new

end

d. What should this code print to the screen when run?

class Student

  def say_hello
    puts self
  end

end

Student.new.say_hello

e. What should this code print to the screen when run?

class Student

  def say_hello
    puts say_goodbye
  end

  def say_goodbye
    "goodbye"
  end

end