July 2013
Intermediate to advanced
282 pages
6h 28m
English
Content preview from Good MathBecome 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,
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Bridging the Gap: From Regular Expressions to Machines
Earlier I said that when regular expression libraries are implemented in programming languages, the way that they work is by converting regular expressions to finite state machines and then using the FSM that they generated to process input strings.
Doing the translation from the regular expression to an FSM is interesting. There are several different ways of converting a regular expression to an FSM. It’s not a one-to-one translation. Depending on which method you choose, you can wind up with different FSMs for the same regular expression. (In fact, theoretically, there are an infinite number of different finite state machines for each regular expression!) Fortunately, that doesn’t matter, ...
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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.