# class Tree
    # attr_accessor :children, :node_name

    # def initialize(hash)
        # @children = []
        # hash.keys.each do |key|
            # @node_name = key
            # hash[key].keys.each do |childkey|
                # @children << Tree.new({ childkey => hash[key][childkey] })
            # end
        # end
    # end

    # def visit_all(&block)
        # visit &block
        # children.each {|c| c.visit_all &block}
    # end

    # def visit(&block)
        # block.call self
    # end

    # def to_s
        # puts @node_name
    # end
# end

# x = {"grandpa" => { "dad" => {"child 1" => {}, "child 2" => {} }, "uncle" => {"child 3" => {}, "child 4" => {} } } }
# y = Tree.new(x)
# y.visit_all { |c| c.to_s }
# i = 0
# File.open("test.txt").each { |line| puts i.to_s + " | " + line if line =~ /blue/ ; i = 1 + i }

module ActsAsCsv
    #where should this go?
    def self.method_missing name, *args
        i = @headers.index(name)

        return if i.nil?

        @csv_contents.each do |c|
            puts c[i]
        end
    end

    def self.included(base)
        base.extend ClassMethods
    end

    def self.method_missing name, *args
        i = @headers.index(name)

        return if i.nil?

        @csv_contents.each do |c|
            puts c[i]
        end
    end

    module ClassMethods
        def acts_as_csv
            include InstanceMethods
        end
    end

    module InstanceMethods
        def read
            @csv_contents = []
            filename = self.class.to_s.downcase + '.txt'
            file = File.new(filename)
            @headers = file.gets.chomp.split(', ')
            file.each do |row|
                @csv_contents << row.chomp.split(', ')
            end
        end

        attr_accessor :headers, :csv_contents

        def initialize
            read
        end
    end
end

class RubyCsv # no inheritance! You can mix it in
    include ActsAsCsv
    acts_as_csv
end

m = RubyCsv.new
puts m.headers.inspect
puts m.csv_contents.inspect
m.one

# OUTPUT:
#["one", "two"]
#[["1correct", "1wrong"], ["2correct", "2wrong"], ["3correct", "3wrong"], ["4correct", "4wrong"], ["5correct", "5wrong"]]
#./grep.rb:93: undefined method `one' for #<RubyCsv:0x3fd3e18> (NoMethodError)