Ok, that's synonymous. Yet, unless I got something completely wrong (then please correct me), constructs like

for($i=0; $i < @array; $i++){ print $array[$i]++ }; 
# Thanks for the dollar, jeffa ;)
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do something different internally. Of course, the second is generally the better/faster approach (unless you don't need $i for something else in the loop, since $i is an unnecessary artificial variable in the first example)).

So long,
Flexx

It's really quite simple - for and foreach are the same. When you don't care about the value of the current index, don't use it:

@array = ('a'..'z');
print $_,$/ for @array;
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When you do care about the value of the current index, do use it:

printf "%02d: %s\n", $_+1, $array[$_] for 0..$#array;
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When in doubt, check with Deparse.pm:

$ perl -MO=Deparse foo.pl
@array = ('a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j',
'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 
'w', 'x', 'y', 'z');
foreach $_ (@array) {
    print $_, $/;
}
foreach $_ (0 .. $#array) {
    printf "%02d: %s\n", $_ + 1, $array[$_];
}
foo.pl syntax OK
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jeffa

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)

Hmm.. You missed my point (or you're repeating what I said). I wasn't comparing for(ARRAY) with for(TEMP_ARRAY), but for(ARRAY) with for(EXPR;EXPR;EXPR).

I do know that for and foreach are synonymous words. I was trying to clarify that in

for (@array) {$_++}

$_ is an implicit alias for the current @array element. While in

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

$_ an alias for the current index. And that, in terms of what to use for what (as you already clarified) was the difference I meant...