mkoby

require ‘./employee.rb’

e = Employee.new
e.say_hello(“Michael”)

mkoby

2/0 # => ZeroDivisionError

# In order to give the user a better error message than "ZeroDivisionError"
# we have to wrap the code using begin & rescue keywords so that Ruby knows
# that we specifically want to do something if an error is encountered

begin
  2/0
rescue
  “You can’t divide by ZERO!”

mkoby

def get_result(number)
  if(number % 3 == 0 && number % 5 == 0)
    return "FizzBuzz"
  elsif(number % 3 == 0)
    return "Fizz"
  elsif(number % 5 == 0)
    return "Buzz"
  else
    return number.to_s
  end

mkoby

puts “Enter your name:”
name = gets.chomp
puts “Hello, #{name}!”

## Output

# PROMPT> ruby hello.rb
# Enter your name:
# Michael
# Hello, Michael!

mkoby

# Basic Module
module MyModule
  def module_hello
    return “MyModule module_hello method”
  end
end

# Class with module included
class ClassOne
  include MyModule

mkoby

class Employee
  attr_accessor :name, :age
  attr_reader :salary, :department
  initialize(name = “”, salary = 0, department = “”)
    @name = name
    @salary = salary
    @department = department
  end
  def set_new_salary(salary)
    @salary = salary

mkoby

class Employee
  attr_accessor :name
  def self.new_with_name(name)
    output = self.new
    output.name = name
    return output
  end
end

# List all methods on the employee class and sort them

mkoby

## Here is a basic class, with a basic
## initialize method that takes a name
## argument

class Employee
  attr_accessor :name
  def initialize(name)
    @name = name
  end
end

mkoby

## This is a basic Ruby class
class Employee
end

## We can create an object from this class
e = Employee.new # => #<Employe:0x37978873> #Or some other gibberish

mkoby

## Basic method with multiple arguments
def add_numbers(a, b)
  a + b
end

add_numbers(5, 4) # => 9