class VerbalArithmetic def initialize(expr) parse(expr) analys end attr_reader :factor, :sum, :table private def parse(expr) term = expr.scan(/\w+/) unless expr.count('=') == 1 && (expr.count('+') + 2) == term.length raise AugmentError, "s…

hatena::antennaに移行。igoogleにいろんなアンテナのLinkを追加。