On Sep 12, 2008, at 11:39 AM, Andrew Ballard wrote:
On Fri, Sep 12, 2008 at 9:52 AM, Jochem Maas <jochem@xxxxxxxxxxxxx>
wrote:
Luke schreef:
I wonder if this is a shared trait between C and PHP (since I
understand
PHP
is written in C) that the break; and the default: are placed for
good
practice in all switch statements since they prevent memory leaks?
default is not required, never heard it was good practice to always
put it
in.
I can't say I've ever heard it recommended as good practice from the
standpoint of performance in any specific language I've ever worked
with, but I have heard people suggest that you always include an
explicit default case in any kind of branching logic. It does seem
useless to say
default: // do nothing
break;
in a switch block, but I imagine the reasoning behind it is so that
anyone who reads your code can see that you actually thought about
what should/would happen if none of the other conditions were true
rather than ignoring those conditions.
It is always useful for a 'default:' case, which would normally do
nothing, to include some debug-only code so you can be notified if the
default case is ever hit. Whenever I see an empty or just missing
'default:' case, I always cringe.
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