reading expanded (Apertium) dix

read_expanded_dix.rb

module LDIX
  class Parser
    def initialize
    end

    def parse_tag(raw)
      if raw.nil?
        []
      else
        raw.map{|t| t[1..-2]}
        .select{|t| not t.nil?}
      end
    end
    
    def parse_col(col)
      if col.empty?
        nil
      else
        toks = col.split(/(<\w+>)/)
        {headword: toks[0],
          tags: parse_tag(toks[1..-1])}
      end
    end
    
    def parse_line(line)
      line
        .chomp 
        .split(/:[<>]:|:/)
        .map{|col| parse_col(col)}
    end
  end
end

Use /:|:[<>]:/ to split left and right as Unhammer recommended

/:|:[<>]:/ didn't work
/:[<>]:|:/ do