iamEddielo/mod-1-discussion-questions-using-self-in-ruby

self Discussion Questions

Instructions

Take 30 minutes and answer the following questions together with your group. Take turns playing around with the code provided in Pry or IRB.

1 .

  class FunnyBots  

    attr_accessor :name, :quotes  

    @@bots = []

    def initialize(name, quotes)
      @name = name
      @quotes = quotes
      @@bots << self
    end

   def random_quote
      self.quotes.sample
    end

    def self.bots
      @@bots
    end

end

  archer = FunnyBots.new("Archer", ["Q: How did the programmer die in the shower? A:He read the shampoo bottle instructions: Lather. Rinse. Repeat. ", "A UI is like a joke. If you have to explain it, it's not good.", "Q: How many programmers does it take to change a light bulb? A: None – It’s a hardware problem"] )

A. What is self in this line @@bots << self ?
B. What is self in this line self.quotes.sample?
C. What kind of method is self.bots & what is self? D. Will this work archer.bots? Why / why not?

2 .

class Bicycle

  attr_reader :tire

    def initialize(tire, gears, style)
      @tire = tire
      @gears = gears
      @style = style
    end

    def tire_size
      self.tire
    end

    def self.gears
      @gears
    end

end

mongoose = Bicycle.new(4, 10, "BMX")

For what reasons will the following method calls fail :mongoose.tire_size = 5, mongoose.gears, Bicycle.bikes, Bicycle.styles? Restructure the class to fix the issues.

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