Beefy Boxes and Bandwidth Generously Provided by pair Networks
Syntactic Confectionery Delight

Re: JSON saving regex?

by GrandFather (Sage)
on Jan 27, 2012 at 02:32 UTC ( #950251=note: print w/replies, xml ) Need Help??

in reply to JSON saving regex?

In essence you can't do that. $test contains a Perl regular expression object and JSON doesn't have an out-of-the-box way to deal with them.

If you don't need to round trip the data, but are providing it for consumption elsewhere the allow_blessed function will suppresses the error, insert a 'null', and carry on:

use strict; use warnings; use JSON qw(); my $test = {regex => qr/^[\w\@\.]+$/, str => "this is a string"}; my $json = JSON->new(); $json->allow_blessed(1); print $json->encode($test);


{"str":"this is a string","regex":null}

Update: and if you do want to round trip it with another Perl script then think about using YAML instead:

use strict; use warnings; use YAML qw(); my $test = {regex => qr/\w+\W+(\w+)/, str => "this is a string"}; my $yamlStr = YAML::Dump($test); print "YAML: $yamlStr\n"; my $andBack = YAML::Load ($yamlStr); my ($secondWord) = $andBack->{str} =~ $andBack->{regex}; print "Second word is: $secondWord\n";


YAML: --- regex: !!perl/regexp (?-xism:\w+\W+(\w+)) str: this is a string Second word is: is
True laziness is hard work

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://950251]
and all is quiet...

How do I use this? | Other CB clients
Other Users?
Others chilling in the Monastery: (9)
As of 2018-03-18 00:59 GMT
Find Nodes?
    Voting Booth?
    When I think of a mole I think of:

    Results (228 votes). Check out past polls.