RosettaCodeData/Task/Roman-numerals-Encode/Elena/roman-numerals-encode.elena

import system'collections;
import system'routines;
import extensions;
import extensions'text;

static RomanDictionary = new Dictionary()
                            .setAt(1000, "M")
                            .setAt(900, "CM")
                            .setAt(500, "D")
                            .setAt(400, "CD")
                            .setAt(100, "C")
                            .setAt(90, "XC")
                            .setAt(50, "L")
                            .setAt(40, "XL")
                            .setAt(10, "X")
                            .setAt(9, "IX")
                            .setAt(5, "V")
                            .setAt(4, "IV")
                            .setAt(1, "I");

extension op
{
    toRoman()
        = RomanDictionary.accumulate(new StringWriter("I", self), (m,kv => m.replace(new StringWriter("I",kv.Key), kv.Value)));
}

public program()
{
    console.printLine("1990 : ", 1990.toRoman());
    console.printLine("2008 : ", 2008.toRoman());
    console.printLine("1666 : ", 1666.toRoman())
}