Is it permissible for a worshiper to have inanimate objects in front of them, such as a computer table and a trash can, instead of a wall?

It is not obligatory for the worshiper to pray facing a wall; rather, it is legislated for him to pray facing a sutrah (an object or barrier) that prevents people from passing in front of him. This sutrah does not have to be a wall, for the Prophet, peace and blessings be upon him, used to use the back of a saddle or an anzah (a short spear/staff) as a sutrah. A table or similar objects are suitable as a sutrah, but a trash can containing impurities is not permissible to be used as a sutrah.