gistfile1.rb

class Array
  def index_of(&block)
    each_with_index do |item, index|
      return index if yield(item)
    end
  end
end

def print_these_strings(&block)
  block.inspect =~ /#<Proc:.*?@(.*?):(.*?)>/
  file, line = $1, $2.to_i
  
  contents = File.read(file).split("\n")
  line.times { contents.shift }
  
  last_line = contents.index_of { |line| line =~ /^\s*end\s*$/ }
  contents = contents[0..(last_line - 1)]
  array = []
  contents.each do |content|
    array << eval(content)
  end
  
  puts array.join(" and ")
end

print_these_strings do
  "hello"
  "goodbye"
end