29 lines
560 B
Text
29 lines
560 B
Text
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func roman2arabic(roman) {
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var arabic = 0
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var last_digit = 1000
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static m = Hash(
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I => 1,
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V => 5,
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X => 10,
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L => 50,
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C => 100,
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D => 500,
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M => 1000,
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)
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roman.uc.chars.map{m{_} \\ 0}.each { |digit|
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if (last_digit < digit) {
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arabic -= (2 * last_digit)
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}
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arabic += (last_digit = digit)
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}
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return arabic
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}
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%w(MCMXC MMVIII MDCLXVI).each { |roman_digit|
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"%-10s == %d\n".printf(roman_digit, roman2arabic(roman_digit))
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}
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