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syossan27/code.rb

Created December 24, 2020 15:13
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code.rb
codes = Set[]
while codes.size != num
code = (0...6).map { '1234567890qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM'.chars[rand(62)] }.join
next if codes.add?(code).nil?
end
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