A set of useful snippets that I find

snippet.rb

# Outputs text with the specified format
#
# @param [String] text what you want to say
# @param [Hash] options
#
# @return [void]
def say text, options={}
  color  = options[:color] || :white
  weight = options[:weight] || :normal

  background = options[:background] || :none

  c = { black: 30, red: 31, green: 32, yellow: 33, blue: 34, purple: 34, cyan: 36, white: 37 }.fetch(color, 37)
  w = { normal: 0, bold: 1, underline: 4 }.fetch(weight, 0)
  bg = { black: 40, red: 41, green: 42, yellow: 43, blue: 44, purple: 45, cyan: 46, white: 47 }.fetch(background, nil)

  if bg
    puts "\e[%d;%dm\e[%dm%s\e[0m\e[0m" % [w, c, bg, text]
  else
    puts "\e[%d;%dm%s\e[0m" % [w, c, text]
  end
end