2012-09-18から1日間の記事一覧
久しぶりにgem updateをしてみると,長々とエラーが出てきました. $ gem update 略/ruby/lib/ruby/2.0.0/yaml.rb:6:in `<top (required)>': It seems your ruby installation is missing psych (for YAML output). To eliminate this warning, please install libyaml and r</top>…