Re: Keeping a Count in foreach


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by mfriedman (Monk)

on Jun 17, 2002 at 18:03 UTC ( [id://175148]=note: print w/replies, xml )

Need Help??

Can I do this using the foreach structure easily or will I have to resort to a for loop?

There is no real difference between for and foreach, except for convention. From perlsyn:

The foreach keyword is actually a synonym for the for keyword, so you can use foreach for readability or for for brevity.

So,

perl -e 'foreach my $dir(@INC) { print "$dir\n"; }'
perl -e 'for my $dir(@INC) { print $dir\n"; }'
[download]

Are exactly the same, as are

perl -e 'foreach($i = 0; $i < 10; $i++) { print "$i\n"; }'
perl -e 'for($i = 0; $i < 10; $i++) { print "$i\n"; }'
[download]

Comment on Re: Keeping a Count in foreach Select or Download Code

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for != foreach by Util (Priest) on Jun 18, 2002 at 03:14 UTC
Yes, but the first two are completely different from the last two. We have to call these control structures something. When talking about them, we call the first two "foreach loops", and the last two "for loops", regardless of which keyword is used. perlsyn follows this convention in its `=head2` headers, and arunhorne is using it in his question. `$ perl -MO=Deparse,p -e 'for(@z){print}' foreach $_ (@z) { print $_; } -e syntax OK` [download]	[reply] [d/l] [select]
•Re: for != foreach by merlyn (Sage) on Jun 18, 2002 at 03:21 UTC
The way we say it in class is that it's spelled "f" "o" "r", but pronounced "for-each". {grin} -- Randal L. Schwartz, Perl hacker	[reply]

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