2017-09-23 10:01:46 +02:00
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class String
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ALFABET = ("A".."Z").to_a
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2013-04-10 12:38:42 -07:00
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2017-09-23 10:01:46 +02:00
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def caesar_cipher(num)
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self.tr(ALFABET.join, ALFABET.rotate(num).join)
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2013-10-27 22:24:23 +00:00
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end
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2013-04-10 12:38:42 -07:00
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end
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2017-09-23 10:01:46 +02:00
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#demo:
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encypted = "THEYBROKEOURCIPHEREVERYONECANREADTHIS".caesar_cipher(3)
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decrypted = encypted.caesar_cipher(-3)
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