Interesting smashing magazine on developing web apps for the iphone and ipad.

http://www.smashingmagazine.com/2010/05/28/web-development-for-the-iphone-and-ipad-getting-started/

There’s so many email address regular expressions out there, it’s hard to know which one works best. This site has done a comprehensive tests of several regex’s and this one appears to be best…for now.

/^([\w\!\#$\%\&\'\*\+\-\/\=\?\^\`{\|\}\~]+\.)*[\w\!\#$\%\&\'\*\+\-\/\=\?\^\`{\|\}\~]+@((((([a-z0-9]{1}[a-z0-9\-]{0,62}[a-z0-9]{1})|[a-z])\.)+[a-z]{2,6})|(\d{1,3}\.){3}\d{1,3}(\:\d{1,5})?)$/i

http://fightingforalostcause.net/misc/2006/compare-email-regex.php

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The ones for gaining speed on DOM insertion are particularly interesting.

http://www.tvidesign.co.uk/blog/improve-your-jquery-25-excellent-tips.aspx

For SEO purposes, it’s always a good idea to send all visitors to one domain for your site. For example, Google will index both http://example.com and http://www.example.com and count it as duplicate content. Therefore, it’s a good idea to forward all traffic to one or the other. In the example below, I want traffic to be forwarded differently if it’s a subdomain versus a non-subdomain. This example avoids using hard coded domains so it can be easily copied and implemented in your .htaccess file or apache conf file.

RewriteEngine on

# Rewrite regular domains to always have www
RewriteCond %{HTTP_HOST} !^www\.[a-z-]+\.[a-z]{2,6} [NC]
RewriteCond %{HTTP_HOST} !^[^\.]+\.[^\.]+\.[^\.]+ [NC]
RewriteCond %{HTTP_HOST} ([a-z-]+\.[a-z]{2,6})$ [NC]
RewriteRule ^(.*)$ http://www.%1/$1 [R=301,L]

# Rewrite subdomains to NEVER have www
RewriteCond %{HTTP_HOST} ^www\.([^\.]+)\.([^\.]+)\.([^\.]+) [NC]
RewriteRule ^(.*)$ http://%1.%2.%3/$1 [R=301,NC,L]

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http://datacharmer.blogspot.com/2010/05/two-quick-performance-tips-with-mysql.html

The main point is that if you have columns with nulls, those nulls are stored in the first partition and if that partition is large, then you will take a big hit.  To avoid such, add an empty partition to be the first partition and it runs much faster.

http://www.noupe.com/php/htaccess-techniques.html

Our apache configs are pretty complex these days, but this article is a good read for anyone needing a ‘back-to-basics’ primer.

This is a quick read, covering 12 small htaccess snippets ranging from compressing asset files and forcing download headers to how to do a simple 301 redirect.