gistfile1.rb

# bigger, easy to debug
def find_author(context)
  context = context.to_i  
  return if context.zero?

  author = @authors.fetch(context)
  return unless !!author

  author.fetch(:email)
end

#   context.present? && context.to_i != 0 ? @authors[context.to_i][:email] : nil

# quick answer, hard to debug
def find_author(context)
  @authors[context][:email] rescue nil
end