Translation of a regular expression into an nfa

Assignment Help Basic Statistics

Reference no: EM131096591

Translation of a regular expression into an NFA is fast and simple. Creation of an equivalent DFA is slower and can lead to a much larger automaton. An interesting alternative is to scan using NFAs, thus obviating the need to ever build a DFA. The idea is to mimic the operation of the CLOSE and MAKEDETERMINISTIC routines (as defined in Section 3.7.2) while scanning. A set of possible states, rather than a single current state, is maintained. As characters are read, transitions from each state in the current set are followed, thereby creating a new set of states. If any state in the current set is final, the characters read will comprise a valid token. Define a suitable encoding for an NFA (perhaps a generalization of the transition table used for DFAs) and write a scanner driver that can use this encoding by following the set-of-states approach outlined previously. This approach to scanning will surely be slower than the standard approach, which uses DFAs. Under what circumstances is scanning using NFAs attractive?

Reference no: EM131096591

Questions Cloud

Identify the primary principles of contract law : Identify the primary principles of contract law. What needs to be in place for a valid contract? Describe thoroughly and weave in elements of a real-world example to help explain.

What is the expected equilibrium price and quantity of bonds : The demand curve and supply curve for one-year discount bonds with a face value of $1,000 are represented by the following equations: Bd : Price = -0.6 Quantity + 1140 Bs : Price = Quantity + 700. What is the expected equilibrium price and quantity o..

How did criminologists view crime victims : __________ uses multiple advances computational methods, including artificial intelligence, to analyze large data sets usually involving one or more data solutions.

Example of adverse selection or moral hazard : Identify whether each of the following is an example of adverse selection or moral hazard and explain why:

Translation of a regular expression into an nfa : Translation of a regular expression into an NFA is fast and simple. Creation of an equivalent DFA is slower and can lead to a much larger automaton. An interesting alternative is to scan using NFAs, thus obviating the need to ever build a DFA.

Governments in canada do to encourage economic growth : Suppose that aggregate demand increases by $1 billion, what would happen to equilibrium RGDP? Explain. When the price level is falling, we experience deflation. This occurred in Japan not to long ago. What do you believe causes deflation? How might i..

Liability of the sports organization : In 1,000-1,500 words, discuss how the preventive law process could limit the liability of the sports organization. Address the following:

Anticyber squatting consumer protection act : Austin ?led a suit in a federal district court against the new registrant under the Anticyber squatting Consumer Protection Act. Is Austin entitled to a transfer of the domain names? Explain.

At what point do diminishing returns set in : Suppose that 0 workers generate 0 output, 1 worker generates 8 units of output, 2 workers generate 20, 3 workers generate 35, 4 workers generate 45, and 5 workers generate 47 units of output, 6 workers generate 47 units of output, while 7 workers gen..

User Account

All Pages