Checkpoint 04

If you have not completed the survey yet, please do so by the end of the day!

Instructions

1. Fork this repo
2. Clone your fork
3. Fill in your answers by writing in the appropriate area, or placing an 'x' in the square brackets (for multiple-choice questions).
4. Add/Commit/Push your changes to Github.
5. Open a pull request.

Note: Only place your answer between backticks. Don't modify the backticks, or the language specifier after them.

Ruby Basics & Enumerables (meets Beauty and the Beast)

Question 1

Define a method called offer_rose, which should take one argument named person.

When called the method should puts "Would you take this rose, person, in exchange for giving an old beggar woman shelter from the bitter cold?"

Demonstrate calling the method, passing in "young prince" as the argument.

Write your code here:

# code here

Question 2

Assume the following hash:

town = {
  residents: ["Maurice", "Belle", "Gaston"],
  castle: {
    num_rooms: 47,
    residents: "Robby Benson",
    guests: []
  }
}

Using Ruby, remove Belle from the town residents, and add her to the list of guests in the castle.

Write your code here:

# code here

Question 3

Assume you have an array of strings representing friend's names:

friends = ["Chip Potts", "Cogsworth", "Lumière", "Mrs. Potts"]

Using .each AND string interpolation, produce output (using puts) like so:

Belle is friends with Chip Potts
Belle is friends with Cogsworth
Belle is friends with Lumière
Belle is friends with Mrs. Potts

Write your code here:

# code here

Ruby OOP (meets Lion King)

Question 4

Create ruby classes for Animal and Lion. Each Animal should have:

• a name attribute
• a greet instance method
• Getter and setter for name

Create a new Animal instance with the name "Pumba"

Make the Lion inherit from the Animal class. The Lion class should have a pack class variable that holds references to each instance created.

Each lion should have:

• a king attribute which is a boolean
  • If the instance's name is Simba make the king attribute true

Create a new lion instance with the name simba

# code here

SQL, Databases, and ActiveRecord (meets Aladdin)

Question 5

Describe what an ERD is, and why we create them for applications. Also give an example what the attributes and relationships might be for the following entities (no need to draw an ERD):

• Genie
• Lamp
• Person
• Pet

Your answer:

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Question 6

Describe what a schema is, and how we represent a one-to-many relationship in a SQL database. If you need an example, you can use: people and wishes (one-to-many).

Your answer:

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Question 7

Given an active record class Person. That inherits from ActiveRecord::Base and the following schema :

class Person < ActiveRecord::Base
end

CREATE TABLE persons(
  id SERIAL PRIMARY KEY,
  name VARCHAR NOT NULL,
  age INT NOT NULL
)

Write ruby code that will create a person.

Your answer:

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Write ruby code that will query for any person that is 15 years of age

Your answer:

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Sinatra

Write a route in sinatra that will print "hello world" in the web browser at the following URL: http://localhost:4567/oh_hello

Your answer:

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