What does it mean when a Perl method returns a "hashref"?
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by Uri
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Published on 2010-05-15T15:47:34Z
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2010/05/15
23:30 UTC
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perl
I'm trying to decrypt a Perl code which I'm not familiar with, somehow related to HashRef. I'm using Amazon::S3, but my question is a general Perl question. See the code below:
use Amazon::S3;
my $s3 = Amazon::S3->new( ... );
my $response = $s3->buckets;
Documentation (here) sais, about s3->buckets:
Returns undef on error, else HASHREF of results
The following line is working for me, but I don't understand why:
for $b in ( @ { $response->{buckets} } ) {
print "bucket: " . $b->bucket . "\n";
}
I'm Puzzled by each operator on the first line.
What type exactly are $response, $respone->{bucket}.
Looks like the expression within the for is an array, but I don't understand this syntax: @{ ... }?
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