Regular Expressions

Regular expressions proves to be very useful. For example, we can use the regular expression "\b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}\b" to search for an email address*. Since I first learned about regular expressions in 207 I was not as confused although our approach in 207 seems to be different.

Proving that a regular expression denotes a language follows the [IF] and [ONLYIF] structure using concatenation on an arbitrary string. Since this is a prove, we already have the regular expression which makes concatenating much easier.

Term Test 2:
It was pretty easy. In fact, too easy. Too easy it makes me mad at myself for studying that horrible looking double-loop.

Problem Set #5:
Well, my first instinct was induction. It was, using it on what, which seemed a bit odd.

*http://www.regular-expressions.info/