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August 29, 2015 14:00
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結城浩さん《スペーストーキー問題》 http://www.hyuki.com/codeiq/#c16 のデコーダ
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require 'open-uri' | |
ARGF.each_line do |l| | |
input, output = l.chomp.split(/:/) | |
next if input =~ /[A-Z]/ | |
actual = open("http://spacetalky.textfile.org/api.cgi?input=#{input}").read | |
if output != actual | |
puts "From #{input} expected #{output} but actually #{actual}" | |
end | |
sleep(0.5) | |
end |
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class EncodedString < String | |
@@zero = 'a'.ord - 1 | |
def decode | |
return 'X' unless self.strip.length.even? | |
r = '' | |
p = '' | |
self.strip.scan(/(.)(.)/).each do |c, n| | |
return 'X' if p == c # 同じ文字が続いてしまう | |
r += c * (n.ord - @@zero) | |
p = n != 'z' ? c : '' # 前回の長さが'z'の場合は同じ文字が続いてもよい | |
end | |
return r | |
end | |
end | |
ARGF.each_line do |l| | |
puts "#{EncodedString.new(l).decode}:#{l.chomp}" | |
end |
https://gist.github.com/zunda/11371334/69eb70ce36f7d7a69dccc7dafee9657553c36685#file-decoder-rb-L10
というわけでフィードバックをいただいてからの改良版
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https://gist.github.com/zunda/11371334/39472534145a35c5fe5b549b6239f88c5e8b9f75#file-decoder-rb-L8
L8に見落しがありました。前回26文字の場合には続けられるのですよね