RubyでANSIカラーシーケンスを学ぼう！

print "\e[31mhello\e[0m"

print "\e[31m\e[43m\e[5mhello\e[0m"

print "\e[31;43;5mhello\e[0m"

require 'highline'
h = HighLine.new
puts h.color("hello", :green)

puts h.color("Ruby World", :red, :on_cyan, :underline)

require 'termcolor'
puts TermColor.parse("<green>hello</green>")
puts TermColor.parse("<red><on_white><blink>ruby is fun!</blink></on_white></red>")

puts TermColor.colorize("hello", :green)

puts "<red><bold>Ruby is red!</bold></red>".termcolor

require 'rainbow'
puts "hello".color(:red)
puts "hello".color(255, 0, 0)
puts "hello".color(:red).background(:green)
puts "hello".bright.background(:blue).blink

require 'term/ansicolor'
class Color
  extend Term::ANSIColor
end
print Color.red, Color.bold, "No Namespace cluttering:", Color.clear, "\n"
print Color.green + "green" + Color.clear, "\n"
print Color.on_red(Color.green("green")), "\n"
print Color.yellow { Color.on_black { "yellow on_black" } }, "\n\n"

c = Term::ANSIColor
print c.red, c.bold, "No Namespace cluttering (alternative):", c.clear, "\n"
print c.green + "green" + c.clear, "\n"
print c.on_red(c.green("green")), "\n"
print c.yellow { c.on_black { "yellow on_black" } }, "\n\n"

include Term::ANSIColor
print red, bold, "Usage as constants:", reset, "\n"
print red("red"),  on_red("on_red"), "\n"
print red { bold { "Usage as block forms:" } }, "\n"

class String
  include Term::ANSIColor
end
print "Usage as String Mixins:".red.bold, "\n"
print "Hello, World\n".blue.on_yellow.blink

require "wirble"
w = Wirble::Colorize
puts w.colorize_string("Hello, Ruby", :light_cyan)
puts w.colorize("hello, :hello, [1, 2, 3], {:a => 1, :b => 2}")

require 'wirble'
  Wirble.init
  Wirble.colorize

require "coderay"
puts CodeRay.scan("5.times do\n puts 'hello, ruby'\nend", :ruby).term

puts CodeRay.scan_file("code.rb").div(:line_numbers => :table)

require 'paint'
 Paint['Ruby', :red] #=> "\e[31mRuby\e[0m"
 Paint['Ruby', :red, :bright, :underline] #=> "\e[31;1;4mRuby\e[0m"
 Paint['Ruby', :red, :blue] #=> "\e[31;44mRuby\e[0m"

Paint['Ruby', [100, 255, 5]] #=> "\e[38;5;118mRuby\e[0m"
 Paint['Ruby', "gold", "snow"] #=> "\e[38;5;226;48;5;231mRuby\e[0m"
 Paint['Ruby', "#123456"] #=> "\e[38;5;24mRuby\e[0m"
 Paint['Ruby', "fff"] #=> "\e[38;5;231mRuby\e[0m"

それが削除されたということを示すために Paint['Ruby'] #=> "\e[37mRuby\e[0m" 
 Paint['Ruby', :inverse] #=> "\e[7mRuby\e[0m"

Paint::SHORTCUTS[:mycolor] = {
     :white => Paint.color(:black),
     :red   => Paint.color(:red, :bright),
     :title => Paint.color(:underline)
   } #=> {:white=>"\e[30m", :red=>"\e[31;1m", :title=>"\e[4m"}

Paint::Mycolor.red "Ruby" #=> "\e[31;1mRuby\e[0m"
 Paint::Mycolor.white #=> "\e[30m"
 Paint::Mycolor.title "Ruby" #=> "\e[4mRuby\e[0m"
 include Paint::Mycolor #=> Object
 red "Ruby" #=> "\e[31;1mRuby\e[0m"
 white "Ruby" #=> "\e[30mRuby\e[0m"

include Paint::Mycolor::String #=> Object
 "Ruby".red #=> "\e[1;31mRuby\e[0m"
 "Ruby".title #=> "\e[4mRuby\e[0m"
 5.red #=> "\e[31;1m5\e[0m"
 [1, 2].red #=> "\e[31;1m[1, 2]\e[0m"

include Paint::Mycolor::Prefix::C #=> Object
 "Ruby".c(:red) #=> "\e[31;1mRuby\e[0m"
 "Ruby".c(:title) #=> "\e[4mRuby\e[0m"
 [1, 2].c(:red) #=> "\e[31;1m[1, 2]\e[0m"

"Charlie 21 programmer".colco(:red, :yellow, :cyan) # => "\e[31mCharlie\e[0m \e[33m21\e[0m \e[36mprogrammer\e[0m"

require "colcolor"

list = <<-EOS
Charlie\t21\tprogrammer
Bill\t43\tdoctor
Liz\t18\tstudent
EOS

list.each_line do |line|
  puts line.colco(:green, :yellow, :blue)
end

list.each_line do |line|
  puts line.colco(:green, :red_yellow, :blue_underline)
end

list = <<-EOS
Charlie Brown\t21\tprogrammer
Bill Clinton\t43\tdoctor
Liz Taylor\t18\tstudent
EOS

# 不適切な例:

list.each_line do |line|
  puts line.colco(:bg_green, :bg_green, :yellow, :blue_underline)
end

puts

# regexpオプションを使った例:

re = /^.*?(?=\t)|\S+/ # 最初のタブの前、または空白以外にマッチ

list.each_line do |line|
  puts line.colco(:bg_green, :yellow, :blue_underline, regexp:re)
end