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深入理解運算原理|從簡單的機器到無所不能的程式
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深入理解運算原理|從簡單的機器到無所不能的程式

by Tom Stuart
November 2017
Beginner to intermediate
344 pages
7h 2m
Chinese
GoTop Information, Inc.
Content preview from 深入理解運算原理|從簡單的機器到無所不能的程式
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93
在這種情況,合併後的機器的成分如下:
新的起始狀態
兩個 NFA 的所有接受狀態
兩個 NFA 的所有規則
兩個額外的自由移動,將新的起始狀態連接到每個 NFA 的舊起始狀態
同樣的,這如同
Choose#to_nfa_design
容易實作:
class Choose
def to_nfa_design
first_nfa_design = first.to_nfa_design
second_nfa_design = second.to_nfa_design
start_state = Object.new
accept_states = first_nfa_design.accept_states + second_nfa_design.accept_states
rules = first_nfa_design.rulebook.rules + second_nfa_design.rulebook.rules
extra_rules = [first_nfa_design, second_nfa_design].map { |nfa_design|
FARule.new(start_state, nil, nfa_design.start_state)
}
rulebook = NFARulebook.new(rules + extra_rules)
NFADesign.new(start_state, accept_states, ...
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Publisher Resources

ISBN: 9789864766000