HOw to extract data using json

[Priti24]

i have a variable like $list having some value

$list = "res":{ "url":"http://www.astm.org/FULL_TEXT/D5447/HTML/D5447.
+htm", "title":"Standard Guide for Application of a Groundwater Flow M
+odel to a Site-Specific Problem ", "snippet":"1.1 This guide covers t
+he application and subsequent documentation of a groundwater flow mod
+el to a particular site or problem. In this context, x201C; groundwat
+er flow model x201D; refers to the application of a mathematical mode
+l to the solution of a site-specific groundwater flow problem. 1.2 Th
+is guide illustrates the major steps to take in developing a groundwa
+ter flow model that ", "meta":{"gs_designation":"D5447","mc_section":
+"04","mc_maincomm":"D18","mc_date":"2010","mc_dltype":"allstd,active"
+,"mc_doctype":"Active Standard","mc_addtocart":"PDF-D5447","mc_login"
+:"true","mc_suburl":"/SUBSCRIPTION/filtrexx40.cgi?+/usr6/htdocs/newpi
+lot.com/SUBSCRIPTION/REDLINE_PAGES/D5447.htm","mc_relatedurl":"D5447_
+related.htm","mc_keywords":" computer model~ groundwater~ simulation~
+ Ground-water model~ ICS Number Code 13.060.10 (Water of natural reso
+urces)","gs_year":"04(2010)","gs_collection":"EEE,EEE,OOO","gs_homebo
+ok":"0408 CS04" } }}

i want to extract url ,title ,date from this variable. please help me how could this be possible using JSON.

[Anonymous Monk]

Using the module JSON?

Have you read perlintro yes? You should read perlintro, Quote and Quote like Operators, Tutorials: References quick reference

#!/usr/bin/perl --
use strict; use warnings;
use JSON;
Main( @ARGV );
exit( 0 );
sub Main {
    my $json = <<'__JSON__';
{"res": { "url":"http://www.astm.org/FULL_TEXT/D5447/HTML/D5447.htm", 
+"title":"Standard Guide for Application of a Groundwater Flow Model t
+o a Site-Specific Problem ", "snippet":"1.1 This guide covers the app
+lication and subsequent documentation of a groundwater flow model to 
+a particular site or problem. In this context, x201C; groundwater flo
+w model x201D; refers to the application of a mathematical model to t
+he solution of a site-specific groundwater flow problem. 1.2 This gui
+de illustrates the major steps to take in developing a groundwater fl
+ow model that ", "meta":{"gs_designation":"D5447","mc_section":"04","
+mc_maincomm":"D18","mc_date":"2010","mc_dltype":"allstd,active","mc_d
+octype":"Active Standard","mc_addtocart":"PDF-D5447","mc_login":"true
+","mc_suburl":"/SUBSCRIPTION/filtrexx40.cgi?+/usr6/htdocs/newpilot.co
+m/SUBSCRIPTION/REDLINE_PAGES/D5447.htm","mc_relatedurl":"D5447_relate
+d.htm","mc_keywords":" computer model~ groundwater~ simulation~ Groun
+d-water model~ ICS Number Code 13.060.10 (Water of natural resources)
+","gs_year":"04(2010)","gs_collection":"EEE,EEE,OOO","gs_homebook":"0
+408 CS04" } }}
__JSON__

    my $perl_scalar = JSON->new->decode($json);
    
    print JSON->new->utf8(1)->pretty(1)->encode($perl_scalar);
    print '#' x 6, , "\n";    
    print $perl_scalar->{res}{title}, "\n";    
}
__END__
{
   "res" : {
      "snippet" : "1.1 This guide covers the application and subsequen
+t documentation of a groundwater flow model to a particular site or p
+roblem. In this context, x201C; groundwater flow model x201D; refers 
+to the application of a mathematical model to the solution of a site-
+specific groundwater flow problem. 1.2 This guide illustrates the maj
+or steps to take in developing a groundwater flow model that ",
      "url" : "http://www.astm.org/FULL_TEXT/D5447/HTML/D5447.htm",
      "title" : "Standard Guide for Application of a Groundwater Flow 
+Model to a Site-Specific Problem ",
      "meta" : {
         "mc_date" : "2010",
         "gs_collection" : "EEE,EEE,OOO",
         "gs_homebook" : "0408 CS04",
         "mc_section" : "04",
         "mc_login" : "true",
         "mc_maincomm" : "D18",
         "mc_keywords" : " computer model~ groundwater~ simulation~ Gr
+ound-water model~ ICS Number Code 13.060.10 (Water of natural resourc
+es)",
         "gs_year" : "04(2010)",
         "mc_dltype" : "allstd,active",
         "mc_relatedurl" : "D5447_related.htm",
         "gs_designation" : "D5447",
         "mc_addtocart" : "PDF-D5447",
         "mc_suburl" : "/SUBSCRIPTION/filtrexx40.cgi?+/usr6/htdocs/new
+pilot.com/SUBSCRIPTION/REDLINE_PAGES/D5447.htm",
         "mc_doctype" : "Active Standard"
      }
   }
}
######
Standard Guide for Application of a Groundwater Flow Model to a Site-S
+pecific Problem