The last part of this course is about regular expression. I
have being used regular expression for a long time. The material of lecture introduced is easy for
sample. They include 0 and 1 only. (Oh, I am wrong, empty and null are
included.)In practice, regular expression involves all characters and signs,
like email address, http links or formatted numbers. So, the content we learned
looks no useful. Maybe there is higher level course that expends this basic
skill to introduce more complicated samples like we meet in the work.
So far, I do not know the usage of automata in the live. I
remember I started to use regular expression at beginning of this century with
some programming language(JAVA or C#??). Base on my opinion, regular expression
and automata were developed with language development. So, we use regular
expression to match search. Is it the unique application for regular
expression?
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