#!/usr/bin/ruby

# See: http://en.wikipedia.org/wiki/Ruby_(programming_language)#Metaprogramming

class Color(text) {
    static COLORS = :(
           black   => "000",
           red     => "f00",
           green   => "0f0",
           yellow  => "ff0",
           blue    => "00f",
           magenta => "f0f",
           cyan    => "0ff",
           white   => "fff",
        );

    COLORS.each { |color, code|
        __CLASS__.def_method("in_#{color}", func (self) {
            "<span style=\"color: ##{code}\">#{self.text}</span>"
        });
    }
};

var text = Color("Hello World");

say text.in_red;
say text.in_green;
say text.in_blue;

# Tests
text.in_red.contains('#f00')  || die "in_red  -- error!";
text.in_cyan.contains('#0ff') || die "in_cyan -- error!";
text.in_blue.contains('#00f') || die "in_blue -- error!";
