troter https://blog.hatena.ne.jp/troter/ 放牧日記 https://troter.hatenablog.jp/ Ruby QUIZ 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, "syntax error: #{expr}" end @factors = term[0,(expr.count('+') … 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftroter.hatenablog.jp%2Fentry%2F20070617%2F1182085648" title=" Verbal Arithmetic (#128) - 放牧日記" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2007-06-17 22:07:28 rich https://troter.hatenablog.jp/entry/20070617/1182085648 1.0 100%