Appendix A. Answers to Selected Exercises
The Answer to the Great Question... Of Life, the Universe and Everything... Is... Forty-two, said Deep Thought, with infinite majesty and calm.
—Douglas Adams, October 1979(from The Hitchhiker’s Guide to theGalaxy, 1979, Pan Books)
Chapter 1
Regular Expressions
1-1. Matching strings
bat, hat, bit, etc.
[bh][aiu]t
1-2. First name last
[A-Za-z-]+ [A-Za-z-]+
(Any pair of words separated by a single space, that is, first and last names, hyphens allowed)
1-3. Last name first
[A-Za-z-]+, [A-Za-z]
(Any word and single letter separated by a comma and single space, as in, last name, first initial)
[A-Za-z-]+, [A-Za-z-]+
(Any pair of words separated by a comma and single space, such as, last, first names, hyphens ...
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