On Mar 1, Jon Molin said:
>I've always thought there's a difference between for and foreach, that
>for uses copies and foreach not. But there's no diff is there?
>From perlsyn, "Foreach Loops":
The foreach keyword is actually a synonym for the for
keyword, so you can use foreach for readability or for for
brevity.
>why isn't it possible to write:
>$b += 2 for my $b (@a);
>
>but possible to write
>for my $b (@a) {$b += 2};
All the expression modifiers are designed that way:
if EXPR
unless EXPR
while EXPR
until EXPR
foreach EXPR
It has to be an expression -- that means you can't say:
print $i for ($i = 0; $i < 10; $i++);
And if you decided to leave off the parens... it would have a surprising
result. ;)
--
Jeff "japhy" Pinyan [EMAIL PROTECTED] http://www.pobox.com/~japhy/
RPI Acacia brother #734 http://www.perlmonks.org/ http://www.cpan.org/
** Look for "Regular Expressions in Perl" published by Manning, in 2002 **
<stu> what does y/// stand for? <tenderpuss> why, yansliterate of course.
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