# File lib/vcard/vcard.rb, line 1358 def copy(card) # :yields: Field card.each do |field| fieldname = field.name.upcase case when [ "BEGIN", "END" ].include?(fieldname) # Never copy these when [ "VERSION", "N", "FN" ].include?(fieldname) && @card.field(fieldname) # Copy these only if they don't already exist. else if block_given? field = yield field end if field add_field(field) end end end end