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shigemk2/13-230449.rb

Created June 15, 2013 03:06
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正規表現でデクリメントしてみた
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13-230449.rb
# -*- coding: utf-8 -*-
hoge = '99999999-1000'
/(-\d*)/ =~ hoge
tekitou = $&.to_i - 1
hoge.gsub!($&, tekitou.to_s)
print(hoge) # 99999999-1001
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