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Rubyでコンソールに色つきで出力

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class String

# colorization
def colorize(color_code)
"\e[#{color_code}m#{self}\e[0m"
end

def red
colorize(31)
end

def green
colorize(32)
end

def yellow
colorize(33)
end

def pink
colorize(35)
end
end

puts "赤色で出力".red
puts "黄色で出力".yellow