CODEWITHSUNDEEP
regexperl
Luis Diaz
Luis Diaz

Reputation: 342

regex capture everything between special characters

I need to capture in perl everything between { and },{ in a string. Occurrences can exists from 0 to a finite number.

I've tried to use:

my @tmp;
my $extract = "";                   
$extract = $1 if $json =~ /\{([^}]+)\}/g;
push @tmp, $extract;

Where $json is the string where I need to extract the content.

Here is an example of two items of $json:

{"id":"AAAAAAAAAA","text":"AAAAAAAAAA","icon":"jstree-folder","li_attr":{"id":"AAAAAAAAAA"},"a_attr":{"href":"#","id":"AAAAAAAAAA_anchor"},"state":{"loaded":true,"opened":true,"selected":false,"disabled":false},"data":{"Taginfo":"default","Type":"","Measure":"","Scale":"default","Filter":"","Concept":"default","Uso":"default","Uso2":"default","Parciales":1},"parent":"#"},{"id":"BBBBBBBBBBBBB","text":"BBBBBBBBBBBBB","icon":"jstree-folder","li_attr":{"id":"BBBBBBBBBBBBB"},"a_attr":{"href":"AAAAAAAAAA","id":"BBBBBBBBBBBBB_anchor"},"state":{"loaded":true,"opened":false,"selected":true,"disabled":false},"data":{"Taginfo":"BBBBBBBBBBBBB","Type":"default","Measure":"default","Scale":"1000","Filter":"1000","Concept":"default","Uso":"","Uso2":"","Parciales":1},"parent":"AAAAAAAAAA"}

Using the regex above, I'm not getting the correct string. i.e: In the first occurrence has to be:

{"id":"AAAAAAAAAA","text":"AAAAAAAAAA","icon":"jstree-folder","li_attr":{"id":"AAAAAAAAAA"},"a_attr":{"href":"#","id":"AAAAAAAAAA_anchor"},"state":{"loaded":true,"opened":true,"selected":false,"disabled":false},"data":{"Taginfo":"default","Type":"","Measure":"","Scale":"default","Filter":"","Concept":"default","Uso":"default","Uso2":"default","Parciales":1},"parent":"#"}

So, I need to capture until the next:

},{

My question is how to ignore end the capture group with },{ instead of just with }?

Thanks.

Upvotes: 0

Views: 175

Answers (1)

anubhava
anubhava

Reputation: 784998

You actually need to use a recursive matching pattern to match closing { .. } like this:

\{(?:[^{}]+|(?0))*}

RegEx Demo

Here (?0) recurses the entire pattern.

Though if you are parsing a valid JSON string then it is better to use JSON parser.

Upvotes: 2

Related Questions