tdyer / wdi_week2_day2_hw

#Methods

###Prereqs

• Data types
• Conditions
• Loops

###What are methods (Learning Objectives)

• Define a function
• Explain why you would use a function
• Inputs and outputs (arguments)
• Why DRY code?

###How to teach this topic #####Suggested ways to introduce the topic

• A lecture describing what methods are and how they can be used
  • Concepts of DRY
  • Reusability
• Codealong / demo: prompts involves rewriting the prompts lab from conditionals into functions
• Lab: ruby_calculator
  • This lab is a bit complex, and may require the instructor to walkthrough the requirements step-by-step as the students fill in the necessary code along the way.

#####How to break it down

• Demonstrate reusability of code, inputs and outputs
• Work with inputs and returning data of various types
• Show how you can use all the code concepts learned thus far within a method
  • Practice defining and calling functions

#####Potential questions, difficulties, and problems

• Variable scope and methods

• Variable naming (method's parameter vs variable name outside the method being passed in)

  val = "string"
  def output(str)
    puts str
  end
  

###Why Methods?

• Now we can introduce the concepts of "DRY code" and begin organizing our code better