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You can "change" the key of an array element simply by setting the new key and removing the old:

I'm trying to filter this database written in Turtle @prefix : <http://www.essepuntato.it/resource/> . @prefix vcard: <http://www.w3.org/2006/vcard/ns#> . @prefix cs: <http://cs.unibo.it/ontology/> . :pt0001 vcard:category "Poste e Telegrafi" ; vcard:fn "Ufficio Bologna 1" ; vcard:extended-address "Via Cairoli 9, Bologna BO, Italy" ; vcard:latitude "44.504192" ; vcard:longitude "11.338661" ; vcard:tel "051 243425" ; vcard:fax "051 244459" ; cs:opening "Mon, Tue, Wed, Thu, Fri: 0800-1330. Sat: 0800-1230." ; cs:closing "01-01, 01-06, P, LA, 04-25, 05-01, 06-02, 08-15, 11-01, 12-08, 12-25, 12-26: .".

I'm experiencing some weird problems with SESSION variables on my PHP/Ajax online shopping cart.

I am in the process of writing a class that will probably end up being around 3000 lines of code.

I would like to store the INDEX_URL constant the easiest way possible.

I have an array of products and i want to sort them with another array.

I have a question about MVC. Particularly about models. Suppose that I have a category table in my database. Now I would like to get results both for a single category for detailed view and multiple categories for a listing. Also I may need to query a number of categories for different purposes.