Joining an array of hashes

Rodster001 has asked for the wisdom of the Perl Monks concerning the following question:

Greetings!

I want to do this in one line but I am having trouble coming up with a solution. $v is an array ref of hashes and each hash in the array has a "name" element and I want to create a string joining that value.

Something like:

my $res = join(",",@{$v}->{name}); # not working
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I am able to reference a value of name specifically doing this:

my $name = ${$v}[0]->{name};
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So I am not quite sure why my join above is not working. Can this be done in one line? Please enlighten me, thanks!

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Re: Joining an array of hashes by kyle (Abbot) on Dec 11, 2008 at 18:43 UTC
Use map for this. `my $res = join q{,}, map { $_->{name} } @{ $v };` [download]	[reply] [d/l]
Re: Joining an array of hashes by jeffa (Bishop) on Dec 11, 2008 at 18:37 UTC
You were this close: `my $res = join(",",@{ $v->{name} });` [download] Update: I think kyle is correct. I should have asked to see what the dump of @v is. jeffa L-LL-L--L-LL-L--L-LL-L-- -R--R-RR-R--R-RR-R--R-RR B--B--B--B--B--B--B--B-- H---H---H---H---H---H--- (the triplet paradiddle with high-hat)	[reply] [d/l] [select]
Re^2: Joining an array of hashes by Rodster001 (Pilgrim) on Dec 11, 2008 at 19:02 UTC
Yeah, Kyle's suggestion was correct. Map worked great. Thanks! Just FYI here is Dumper($v) output `$VAR1 = [, {, 'name' => 'Cat', 'id' => '7670', }, {, 'name' => 'Dog', 'id' => '7671', }, ];, $VAR1 = [, {, 'name' => 'Cat', 'id' => '7670', }, ];,` [download]	[reply] [d/l]