thought I'd take a break from coding and post about how open-source is such a great tool for finding the best answers to the toughest questions,
/** is the status code informational */
#define ap_is_HTTP_INFO(x) (((x) >= 100)&&((x) < 200))
/** is the status code OK ?*/
#define ap_is_HTTP_SUCCESS(x) (((x) >= 200)&&((x) < 300))
/** is the status code a redirect */
#define ap_is_HTTP_REDIRECT(x) (((x) >= 300)&&((x) < 400))
/** is the status code a error (client or server) */
#define ap_is_HTTP_ERROR(x) (((x) >= 400)&&((x) < 600))
/** is the status code a client error */
#define ap_is_HTTP_CLIENT_ERROR(x) (((x) >= 400)&&((x) < 500))
/** is the status code a server error */
#define ap_is_HTTP_SERVER_ERROR(x) (((x) >= 500)&&((x) < 600))
/** is the status code a (potentially) valid response code? */
#define ap_is_HTTP_VALID_RESPONSE(x) (((x) >= 100)&&((x) < 600))
Hacking
mod_rewrite is very useful in many situations. Yet some behaviors were not so obvious when I started to mess with it. After many testings, I understand it much better, now. Having said that, I do not pretend to know it perfectly. I also make mistakes.
Htaccess
Using FastCGI on DreamHost and .htaccess
Shell Scripting
While researching a unix/linux tool awk I came upon one of the most thorough and helpful tutorials I've ever seen devoted to a particular topic. It's old-school just the way I like it. I contacted the author, Bruce Barnett because I just HAD to have this article for my readers, who are predominantly running solaris/unix/bsd/linux and he kindly gave permission.
Linux
We've figured out what mod_rewrite variables look like, a cheatsheet of the actual value.
Htaccess Apache cheatsheet Htaccess htaccess file mod_rewrite PHP rewrite Rewriting
Find and Replace tool in Adobe DreamWeaver is useful of course, but you aren't using a fraction of the power until you use REGEX.
Software

Just a quick reference to all those delicious unicode characters and how they render on the web‽‽
Web Development symbols Unicode
Top 3 ways to speed up websites that use Google Analytics. Host Script Locally, Fix Google-Analytics Cookie Domain, and Failsafe Loading for optimum tracking statistics.
Google
NOT a typo.. 30x is measurable, well-documented, and easily tested. This is what open-source is about. I haven’t had time to post much the past year, I'm always working! So I wanted to make up for that by publishing an article on a topic that would blow your mind and be something that you could actually start using and really get some benefit out of it. This is one of those articles that the majority of web hosting companies would love to see in paperback, so they could burn it.
Optimization tmpfs