Handy. This does gloss over some of the notable differences between implementations (not everything has non-greedy matches or identical {m,n} or {m,} syntax), but it's still by far the best tutorial introduction I've seen for regular expressions.
In my comment above, I said this is the best tutorial introduction I've seen, even with its few limitations regarding differences between regex implementations.
I completely misread "Handy" as "Hardly" and then saw "Hardly. This does gloss over some of the notable differences . . ." which changed the entire tone of your comment for me.
