Practice

RubyFresh.md

####Methods to Know

• .each

• .map

• .inject

• .reject

• .length

• .reverse

• .push

• .pop

• .shift

• .unshift

• .class

• .inspect

        puts "what is your first name"
        first = gets.chomp (removes the line breaks)
        puts "you typed #{first}"
        puts first.inspect
        
        def full_name(first, last)
          return "Hello #{first} #{last}"
        end
  

---

                ##seperate logic from presentation/modular. Should be data and logic as opposed to outputting to the screen
            
            puts "what is your first name"
            first = gets.chomp (removes the line breaks)
            
            puts "what is your last name"
            last = gets.chomp
            
            full_name(first, last)

---

    a = 7
    1 = 0
    
    while ( a <= 20)
      puts a, i
      i +=1
    end

---

    unless (a == 3)
      puts "not 3"
    end
    
    if (a != 3)
      puts "this is also not 3"
    end

---

    case a
      when 5
        puts "this is 5"
      when 6 
        puts"this is 6"
      else
        puts "something different"
    end

Classes

• LONG WAY

    class Rectangle
      attr_accessors :width, :height
    
      def inititalize (passed_in_width, passed_in_height)
        @height = passed_in_height
        @width = passed_in_width
      end
    
      def area
        @height * @width
      end
    
      #reader method
      def width
        @width
      end
    
      def height
        @height
      end
    
      #writer method 
      def width=(width)
        @width = width
      end 
    
      def height=(height)
        @height = height
      end 
    
    end
  

Short Way

    require 'pry'
    
    class Rectangle
      attr_accessors :width, :height
    
      def inititalize (passed_in_width, passed_in_height)
        @height = passed_in_height
        @width = passed_in_width
      end
    
      def area
        @height * @width
      end
    
    end

Super Classes & Inheritance

  require 'pry'

class Rectangle
  attr_accessors :width, :height

  def inititalize (passed_in_width, passed_in_height)
    @height = passed_in_height
    @width = passed_in_width
  end

  def area
    @height * @width
  end

end

class Square < Rectangle

  def initialize(side)
    super(side, side) 
  
  end

end 


a = Rectangle.new(5,4)
b = Square.new(8)

binding.pry