Seems like you are asking about checking for a null pointer versus the value 0. Nowadays I believe the check is equivalent (ie if (!a pointer of 0x0) and if (!0) will go into the same branch of logic). See here: http://stackoverflow.com/questions/176989/do-you-use-null-or-0-zero-for-pointers-in-c
On Tue, Sep 24, 2013 at 3:51 PM, Stephen Lyons <[email protected]>wrote: > It was stupidly late for me to be thinking about code! But what was > unclear to me is: whether - as part of the code used for > TLuaInterpreter::centerview() where it calls TRoomDB::getRoom() and uses > the return value as a boolean one as part of an if() condition. In the > case I was unsure about I wonder whether it is safe to an integer 'zero' > value (where the roomID is NOT a valid room) when the getRoom() function > is supposed to return a pointer to a TRoom class. My uncertainty was > not reduced when I tried to find out more using the Stack Overflow > website. It is quite possible that I have "grabbed the wrong end of the > stick" as it were and my knowledge of C++ is not as good as I would hope > (I'm coming from a C background) so please forgive me if I am in error > here. > > -- > You received this bug notification because you are subscribed to Mudlet. > https://bugs.launchpad.net/bugs/1222338 > > Title: > centerview() on a room ID that doesn't exist causes odd highlighting > > Status in Mudlet the MUD client: > New > > Bug description: > Attached is a screenshot of the map with centerview() on a valid room, > and the next view of when centerview() is not on a valid room - some > rooms and exits get "selected". > > To manage notifications about this bug go to: > https://bugs.launchpad.net/mudlet/+bug/1222338/+subscriptions > -- You received this bug notification because you are a member of Mudlet Makers, which is subscribed to Mudlet. https://bugs.launchpad.net/bugs/1222338 Title: centerview() on a room ID that doesn't exist causes odd highlighting Status in Mudlet the MUD client: New Bug description: Attached is a screenshot of the map with centerview() on a valid room, and the next view of when centerview() is not on a valid room - some rooms and exits get "selected". To manage notifications about this bug go to: https://bugs.launchpad.net/mudlet/+bug/1222338/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~mudlet-makers Post to : [email protected] Unsubscribe : https://launchpad.net/~mudlet-makers More help : https://help.launchpad.net/ListHelp
