Learning C and Obj-C

Hello people,

after all these years of php programming and some breakouts into perl and python, i'm getting pretty interested in "high performance computing" how it's called. So therefore i looked for some easy tutorials for C and Obj-C (used by apple, especially useful if you want to do things for iphone or ipad).

Here are some links if you plan to develop cocoa applications:

Validate email addresses using regular expressions (RFC 2822)

Hi,

this is for everyone who wants to check for a RFC 2822 compliant email. Here are 2 expressions, one for normal and one for strange looking but valid emails:

$normal = "^[a-z0-9_\+-]+(\.[a-z0-9_\+-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*\.([a-z]{2,4})$";

$strange = "^[a-z0-9,!#\$%&'\*\+/=\?\^_`\{\|}~-]+(\.[a-z0-9,!#\$%&'\*\+/=\?\^_`\{\|}~-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*\.([a-z]{2,})$";

source: http://www.markussipila.info/pub/emailvalidator.php