by Nate Starner view the original post

Sometimes holding the option key down while emptying the trash in Mac OS X is not enough. You may find yourself grappling with a file which claims to be “in use” by another application. In my case, it was located in a trashed Parallels directory. Mind you, I uninstalled Parallels eons ago. So, with the sys [...]

It’s tempting to simply use MySQL’s RAND() function to select random records from a table. Consider the following query: However, when considering overhead, this is a rather expensive method to employ. This becomes glaringly apparent when dealing with large datasets. One effective solution is to select the first and last ids, and let PHP generate [...]