(jeffa) Re: Of foreach loops and counting

[jeffa]

Hmm, if you need to keep track of iteration in a loop, then you should use for instead of foreach.

for (my $i=0; $i < $#array; $i++) {

    #print every third line
    print "$array[$i]\n" if (($i % 3)==0);
    
    #or even more consise
    print "$array[$i]\n" unless ($i%3);
}

I know that for is a synonym for foreach, but I simply prefer to use a for construct if I am going to need the current iteration. Guess it's the C inside me. Oh, thanks to KM - I'll be more idiomatic next time. ;)

/me seeks Priest to exorcise evil C demons.

[KM]

I just wanted to comment that this is a very C like way of doing this, and is more idiomatically written as (or something similar as far as the loop construct):

for (0..$#array) {
    print $array[$_];
}

Cheers,
KM

[eak]

for is a synonym of foreach. you make the decision on which one to use based on readabilty, since both behave exactly the same.
--eric