Sven Neumann wrote:> On Tue, 2007-01-30 at 09:11 +0200, Alexander Rabtchevich wrote:>> Raphaël, could you please explain me (I'm new to scheme) in a few >> words, why the global variables are poor style coding?> > They are simply not allowed in Scheme. Ok, that is the reason. > >> From my POV, they >> can only introduce memory consumption in common case (but not in the >> case of GIMP script-fu) and maybe some redefinitions in a large program >> (this doesn't concern Gimp also).> > It does concern GIMP as all scripts live in the same namespace. A global> variable defined in one script affects all other scripts. Is the namespace cleared after script has finished its execution? And are there any scripts considered to run simultaneously? > >> But the inability to use global >> variables along with scheme syntaxes leads to a good deal of parentheses >> which could be a problem to a programmer.> > I don't see how this introduces the need for more parentheses.> ;before(set! selection-path (car (plug-in-sel2path 1 inImage inLayer))) ;after(let (selection-path (car (plug-in-sel2path 1 inImage inLayer))) ... ) note the _closing_ parentheses which should include all the area of the variable definition. -- With respectAlexander Rabtchevich_______________________________________________Gimp-developer mailing listGimp-developer@xxxxxxxxxxxxxxxxxxxxxxxxxxx://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
