This regular expression matches non alphanumeric characters in a string. r = /[^a-z0-9]{1,}/i You can use it to create URL friendly slugs. slug = "hello world!".gsub(/[^a-z0-9]{1,}/i, '-').downcase # => hello-world In combination wit...

Active Record find methods for selecting range from http://charlesmaxwood.com/notes-from-reading-activerecordbase/ Student.find(:all, :conditions => { :grade => 9..12 }) return a range Student.find(:all, :conditions => { :grade => [9,11,12] }) will retu...

It's short and sweet. $obj_from_array = (object)['key'=>'val']; echo $obj_from_array->key;

You can add this snippet to your application, say for instance in your `viewDidLoad` function, that will print to the XCode console, the location of your app while it's being developed. // prints the location of asset my-added-file.txt that you've ad...

How much memory is on my linux server? Run the free command free -g total used free shared buffers cached Mem: 2 1 0 0 0 1 -/+ buffers/cache: 0 1 Swap: ...