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class List

  def initialize(title)
    @list = []
    @title = title
  end

  def append(item)
    if item.is_a?(Item)
      @list << item

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def translate(word)

  if word[0] == "a" || word[0] == "e" || word[0] == "i" || word[0] == "o" || word[0] == "u"
    word << "ay"

  elsif word[0..1] == "qu"
      f = (word[0..1] << 'ay')
      word[0..1] = ""
      word << f

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def triangle(num1,num2,num3)
  if num1 >= num2 + num3 || num2 >= num1 + num3 || num3 >= num2 + num1
    :invalid
  elsif num1 == num2 && num2 == num3 && num3 == num1
    :equilateral
  elsif num1 == num2 || num2 == num3 || num3 == num1
     :isosceles
  elsif num1 != num2 && num2 != num3 && num3 != num1
    :scalene
  end

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def smiley(input)
  if input[:mood] == "happy"  #mood is the key, it also has to be a string
    return ":)"
  elsif input[:mood] == "sad"
    return ":("
  else
    return ":|"
  end
end

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class Numeric
  def add(num)
     self + num
  end

  def subtract(num)
    self - num
  end

  def multiply(num)

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module Calculator
  def add(num)
     self + num
  end

  def subtract(num)
    self - num
  end

  def multiply_by(num)

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Exercise 4

Create a new instance method on the String class called fun_string! which is called on a String object and permanently modifies it by capitalizing the even characters (counting from 1) and then reversing the string. See if you can do it in a single line.

For example,

string = "apples"
string.fun_string!
string # now equals "SeLpPa"

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#Object Oriented Design, Simon Allardice from lynda.com

#Class: SpaceShip
#Attributes: +public name: String
#            -private shieldstrength: Integer
#Operations: +fire( ): String
#            -reduce shields (Integer)

#Notes: 1. Public Class Spaceship
#       2. Attributes are expressed as instance variables, which are variables that belong to an instance of a class.  What this means is that any object created within this class will have their own copy of these variables <--I NEED A VISUAL OF THIS BADLY

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#Given a random array, create a method that sorts the array so the numbers are returned in order.

a= [5, 8, 3, 2, 7, 4, 1, 0, 9, 6, 10, 55]

#Final Answer
def singlesort(a)
  (a.size - 1).times do |i|
    if a[i] > a[i+1]
      x=a[i]
      a[i] = a[i+1]

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def make_address(street,city,state,zip)
 "You live at #{street} in the beautiful city of #{city}, #{state}. Your zip is #{zip}."
end
 
make_address("6056 Plumas St.", "Reno", "NV","89519")