I added my class that makes a rotate random based on a function. Added a operator for liquidsoap for make a module based rotator, and now i will try to make a "function" based rotation in the liquidsoap after i solve the mod issue.
In the attachments is the patch file. Em 5 de outubro de 2011 20:48, Fábio Costa <blackjackde...@gmail.com>escreveu: > I could made what i wanted without the exception , since i need to browse > the whole list. > But i understood that the exception is not the wrong way of do things. > Thanks for the example > > > 2011/10/5 Romain Beauxis <to...@rastageeks.org> > >> 2011/10/5 David Baelde <david.bae...@gmail.com>: >> > Hi Fabio, >> >> Hi all! >> >> > Using exceptions in that kind of code is not wrong, and it's more >> > efficient. Without it, we would have to continue the folding over the >> > rest of the list, even though we already know what we've found. By >> > raising an exception, we interrupt that computation and jump directly >> > to the handler. >> > >> > Exceptions in OCaml are very fast, pretty much a goto/longjmp. This is >> > why (unlike in other languages) they can be used in interesting ways >> > as a programming construct, and not only for errors / exceptional >> > cases. >> >> Not to be pedantic, but the truth is also that fold_left provides a >> quick way to implement what you want, therefore we use exceptions to >> make use of it. >> >> You could do it without exceptions and with a tail-recursive function this >> way: >> >> let rec f result list = >> match list with >> | x :: list' -> >> let result' = (something about x and result.. ) in >> if (for some reason I shall stop) then >> result' >> else >> f result' list' >> | [] -> >> (here it depends: maybe return result, >> or assert false, or..) >> in >> let result = f 0 list in >> (...) >> >> If you are interested into this, we could continue that discussion on >> -devl. In particular, tail-recursive functions are very important in >> OCaml.. >> >> Romain >> > >
switch.patch
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