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- class String
- def convert_base(from, to)
- if from == 1
- return self.size.to_s(to)
- end
- if to == 1
- n = self.to_i(from).to_s(10).dup
- s = ''
- n.to_i.times do s += '1' end
- return s
- end
- self.to_i(from).to_s(to)
- end
- end
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