kmandreza

#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

kmandreza

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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module Calculator
  def add(num)
     self + num
  end

  def subtract(num)
    self - num
  end

  def multiply_by(num)

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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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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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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 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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class List

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

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

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doc = "Usage: example.rb [options] <arguments>...

Options:
  -h --help           show this help message and exit
  add                 add task to the end of the list
  prepend             add task to the beginning of list"

require 'docopt'

if __FILE__ == $0

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#TO CREATE A NEW CLASS

module EvolutionarySkills
  def breed_rapidly(howrapid)
    puts cross_mate.*(howrapid)
  end
end

class SomeNewAnimal < String
  include EvolutionarySkills