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flanger001/caesar.rb

Created July 5, 2016 14:54
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caesar.rb
def caesar(key, text)
az = ('A'..'Z').to_a
rt = az.rotate(key)
chars = text.split('')
.select { |c| az.include?(c) }
.map { |c| rt[az.index(c)] }
.join('')
end
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