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Re: 'prev' in for loop

by gjb (Vicar)
on Dec 06, 2005 at 14:28 UTC ( #514467=note: print w/replies, xml ) Need Help??


in reply to 'prev' in for loop

prev simply isn't Perl. next and last are though.

You can always rewrite a for-loop from:

foreach my $item (@list) { something($item); }
to
for (my $i = 0; $i < @list; $i++) { something($list[$i]); }
By modifying $i you can get to the "previous" iteration (something like $i--. However, be careful not to create an infinite loop.

Hope this helps, -gjb-

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[erix]: we should really dupm the lot, but I got no say in the matter :)
[LanX]: yeah its a religious mafia , the only two big calvinist houses are dutch and prussian. ..
[LanX]: choroba yes
[erix]: Utrecht has a beautiful old center, and less mass-tourism than Amsterdam
[erix]: next time, drop by :)
[LanX]: religion is also the reason how the house of Hanover aquire the English throne, all other candidates on succession where catholics...
[erix]: Henry VIII has a lot to answer for :P
[LanX]: erix sure next time you miss a conference nearby we drop by ...
[LanX]: did you even go to the Dutch Perl Workshop in Utrecht?
[erix]: haha ok. I'm going to Glasgow though, and make a long road trip round the isles

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