September 2014
Intermediate to advanced
336 pages
7h 53m
Japanese
Content preview from アンダースタンディング コンピュテーション ―単純な機械から不可能なプログラムまで
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7.5
タグシステム
233
>>
system = TagSystem.new('aabbbbbbbb', rulebook)
=> #<struct TagSystem ...>
>>
system.run
aabbbbbbbb
（数
4
）
bbbbbbbbcc
bbbbbbccd
bbbbccdd
bbccddd
ccdddd
❶
ddddeo
❷
ddeo
eo
❸
e
❹
=> nil
❶
a
規則と
b
規則は入力を半分にします。
ccdddd
は数2を表します。
❷
c
規則は先頭の
cc
のペアを削除して、文字
eo
を追記します。
eo
のどちらかが最終結果になります。
❸ 空の
d
規則は先頭の
dd
のペアをすべて吸収し、
eo
だけを残します。
❹
e
規則は
eo
を
e
で置き換え、システムは停止します。
入力した数が奇数の場合、結果は文字列
o
（“odd”を表す）になります。
>>
system = TagSystem.new('aabbbbbbbbbb', rulebook)
=> #<struct TagSystem ...>
>>
system.run
aabbbbbbbbbb
（数
5
を表す）
bbbbbbbbbbcc
bbbbbbbbccd
bbbbbbccdd
bbbbccddd
b
bccdddd
ccddddd
❶
dddddeo
dddeo
deo
❷
o
❸
=> nil
❶ 先ほどと同じように数が半分にされますが、今回は奇数なので、結果は
d
を奇数個含んだ文字列
になります。数のエンコードスキームは文字のペアしか使わないので、厳密に言うと
ccdddd
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.