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Posted by April on June 19, 2008, 10:41 pm
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For the following program, found somethings seem not seen before, one
is the input <*>, everything and anything? Another is the usage
$i or $i, etc., not sure what that means?
foreach $f (<*>) ( $i = -S $f };
foreach $k (sort{ $i <=> $i$ } keys %i}
{ printf "%8d %s\n", $i, $k }
Any guru can explain? Thanks!
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Posted by Jürgen Exner on June 20, 2008, 12:25 am
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>For the following program, found somethings seem not seen before, one
>is the input <*>, everything and anything?
Another way of writing
glob(*);
> Another is the usage
>$i or $i, etc., not sure what that means?
See
perldoc perldata
and look for hashes. It is retrieving the value of %i for the key that
has the value of $f resp. $b.
jue
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Posted by John W. Krahn on June 20, 2008, 1:44 am
Please log in for more thread options J=FCrgen Exner wrote:
>> For the following program, found somethings seem not seen before, one
>> is the input <*>, everything and anything?=20
>=20
> Another way of writing=20
> glob(*);
ITYM: glob '*';
John
--=20
Perl isn't a toolbox, but a small machine shop where you
can special-order certain sorts of tools at low cost and
in short order. -- Larry Wall
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Posted by Jürgen Exner on June 20, 2008, 4:40 am
Please log in for more thread options >Jürgen Exner wrote:
>>> For the following program, found somethings seem not seen before, one
>>> is the input <*>, everything and anything?
>>
>> Another way of writing
>> glob(*);
>
>ITYM: glob '*';
Hmmm, yes.
jue
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Posted by xhoster on June 20, 2008, 11:13 am
Please log in for more thread options > For the following program, found somethings seem not seen before, one
> is the input <*>, everything and anything?
Yes. There is nothing special about it, it is just the "file glob" version
of the diamond operator, and just happens to have an argument of '*', which
does indeed mean all non-hidden files (in the current directory).
> Another is the usage
> $i or $i, etc., not sure what that means?
%i is a hash. $i is a hash lookup.
> foreach $f (<*>) ( $i = -S $f };
This is storing each file in the hash %i, with the hash key being the
file name and hash value being the file size.
Xho
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