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
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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.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.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.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.
122
4
章 能力を高める
図4-6
これは状態1から状態2へと導く規則を除いて、DPDAのときと同じです。DPDAでは入力から
m
を
読んでいましたが、NPDAでは自由移動を使っています。自由移動を使うことで、マーカーがなくても
入力文字の任意の場所で状態を変えることができます。
4.2.1
シミュレーション
非決定的な機械は決定的な機械よりもシミュレーションが難しくなりますが、難しい作業はすでに
「3.2.1 非決定性」にあるNFA でやりました。同じ考え方が NPDAにも使えます。まず非決定的な
PDARules
の集合を保持する
NPDARulebook
が必要になります。その実装は
NFARulebook
とほと
んど同じです。
require 'set'
class NPDARulebook < Struct.new(:rules)
def next_configurations(configurations, character)
configurations.flat_map { |config| follow_rules_for(config, character) }.to_set
end
def follow_rules_for(configuration, character)
rules_for(configuration, character).map { |rule| rule.follow(configuration) }
end
def rules_for(configuration, ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.