Build JSON With Perl

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

Hi all,

I am trying to build JSON such as this with Perl:

[{"name":"picture1.jpg","size":902604,"url":"\/\/example.org\/files\/picture1.jpg","thumbnail_url":"\/\/example.org\/thumbnails\/picture1.jpg","delete_url":"\/\/example.org\/upload-handler?file=picture1.jpg","delete_type":"DELETE"},{"name":"picture2.jpg","size":841946,"url":"\/\/example.org\/files\/picture2.jpg","thumbnail_url":"\/\/example.org\/thumbnails\/picture2.jpg","delete_url":"\/\/example.org\/upload-handler?file=picture2.jpg","delete_type":"DELETE"}]

Essentially it is JSON array of JSON objects. However, I am not finding any good tutorials online. Does anyone have any suggestions? Currently I am using the JSON::XS module to decode, but I'm open to anything as long as it works.

Currently I have this code:

my %hash = {};
$hash{'lool'} = "WEEEE";
$hash{'YAY'} = "WEEEE";

my $json = JSON->new->allow_nonref;
my $json_text = $json->encode(\%hash);
[download]

Only problem is that it creates this:

{"lool":"WEEEE","YAY":"WEEEE","HASH(0x8b8410)":null}

Which also include the hash reference itself in it. Any help would be appreciated!

Many Thanks,
srchulo

Comment on Build JSON With Perl Select or Download Code

Replies are listed 'Best First'.
Re: Build JSON With Perl by MVS (Monk) on Nov 11, 2011 at 07:16 UTC
Actually, that's not the hash reference itself that you're seeing. It's the third element of the hash, which was created by the empty curly braces. Change: `my %hash = {};` to: `my %hash;` and it should work the way you're looking for.	[reply] [d/l] [select]
Re^2: Build JSON With Perl by Tux (Canon) on Nov 11, 2011 at 07:20 UTC
Using strict and warnings would have shown that: `Reference found where even-sized list expected at -e line 1.` Good catch though, I missed it in converting the example to a one-liner Enjoy, Have FUN! H.Merijn	[reply] [d/l]
Re: Build JSON With Perl by Tux (Canon) on Nov 11, 2011 at 07:17 UTC
Using JSON-2.53 I get: `$ perl -MJSON -E'say JSON->new->allow_nonref->encode({lool=>"WEEEE",YA +Y=>"WEEEE"})' {"lool":"WEEEE","YAY":"WEEEE"}` [download] Did you miss something in the example code? Enjoy, Have FUN! H.Merijn	[reply] [d/l]


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