Come for the quick hacks, stay for the epiphanies. | |
PerlMonks |
comment on |
( [id://3333]=superdoc: print w/replies, xml ) | Need Help?? |
The inherent weakness in your query is that you are asking for a Perl equivalent to a basic 'switch' idiom, when Perl doesn't provide a 'switch' construct. You are asking about Duff's Device ..... which, as I remember, was invented to save a couple dozen machine instructions. My understanding is that Duff's Device is mostly viewed as poor programming, since saving a few dozen machine cycles at 3 GHz is less important than leading to quick and clear reader understanding of the code. On the other hand, I can imagine programmers dealing with highly-efficient code, such as embedded programmers, might accept Duff as an easily recognized idiom. So the next question is, without a switch statement, how would we implement Duff? We've had one suggestion, using substr(), very closely related to the details of this question. More generally, you might consider re-framing the conditionals:
So, yes, it can be achieved, but you need to think somewhat differently. -- In reply to Re: fall through switch/case in perl
by TomDLux
|
|