Markdown Table Generator Script

file.rb

# 
# Usage:
# 
#   rows = [['User ID', 'Email'], ['1', 'example@email.com'],[2,'someone@email.com']]
#   MarkdownTableGenerator.generate(rows)
# 
module MarkdownTableGenerator
  extend self

  PIPE = '|'.freeze
  DASH = '-'.freeze

  def pipify(row_values)
    row_values.join(PIPE).prepend(PIPE).concat(PIPE)
  end

  def generate(rows)
    header_row = rows.shift
    puts <<~EOS
      #{pipify(header_row)}
      #{pipify((DASH * header_row.size).split(''))}
      #{rows.map { |row| pipify(row) }.join("\n")}
    EOS
  end
end