I recall the very, very first time I learned to ride a bike as a kid. My feet couldn't even reach the paddles. I had to stand on my two feet and joggle in an up-and-down motion to get it going. It was my dad's bicycle. I never had a set of training wheels installed for me. I fell down and tripped countless times before I became good at riding a bike today. I can do it without putting my hands on the handlebars as I ride along. :P
Chains, I find the best way to learn of regex is pay your local library or bookstore a visit. I don't find the info onlie regarding regex adequate enough...