hi rkabhi

sitecustomize.pl is a special perl file that MAY be run before any other code (even BEGIN blocks). If it will be used is determined via compile time switches for the perl executable (-Dusesitecustomize).

If enabled it would be found at "$Config{sitelib}/sitecustomize.pl". The following code displays the settings. 

use strict; use warnings; 
use Config; 

print 'Version         :'.$]."\n"; 

my $versionstr=`perl -v`; 
my $header='perl -v         :'; 
for my $line (split ("\n",$versionstr)) { 
  print $header.$line."\n";; 
  $header='                :'; 
  } 
print 'sitelib         :'.$Config{sitelib}."\n"; 
print 'sitelibexp      :'.$Config{sitelibexp}."\n"; 
print 'usesitecustomize:'.($Config{usesitecustomize}?$Config{usesitecu
+stomize}:'')."\n";

[download]
on my windows box 
Version         :5.020001
perl -v         :
                :This is perl 5, version 20, subversion 1 (v5.20.1) bu
+ilt for MSWin32-x86-multi-thread-64int
                :(with 1 registered patch, see perl -V for more detail
+)
                :
                :Copyright 1987-2014, Larry Wall
                :
                :Binary build 2000 [298557] provided by ActiveState ht
+tp://www.ActiveState.com
                :Built Oct 15 2014 22:10:49
                :
                :Perl may be copied only under the terms of either the
+ Artistic License or the
                :GNU General Public License, which may be found in the
+ Perl 5 source kit.
                :
                :Complete documentation for Perl, including FAQ lists,
+ should be found on
                :this system using "man perl" or "perldoc perl".  If y
+ou have access to the
                :Internet, point your browser at http://www.perl.org/,
+ the Perl Home Page.
sitelib         :C:\Perl\site\lib
sitelibexp      :C:\Perl\site\lib
usesitecustomize:define

[download]
on my lubuntu 14.04.5 
Version         :5.018002
perl -v         :
                :This is perl 5, version 18, subversion 2 (v5.18.2) bu
+ilt for i686-linux-gnu-thread-multi-64int
                :(with 44 registered patches, see perl -V for more det
+ail)
                :
                :Copyright 1987-2013, Larry Wall
                :
                :Perl may be copied only under the terms of either the
+ Artistic License or the
                :GNU General Public License, which may be found in the
+ Perl 5 source kit.
                :
                :Complete documentation for Perl, including FAQ lists,
+ should be found on
                :this system using "man perl" or "perldoc perl".  If y
+ou have access to the
                :Internet, point your browser at http://www.perl.org/,
+ the Perl Home Page.
sitelib         :/usr/local/share/perl/5.18.2
sitelibexp      :/usr/local/share/perl/5.18.2
usesitecustomize:

[download]
on my lxle 12.04.5 
Version         :5.014002
perl -v         :
                :This is perl 5, version 14, subversion 2 (v5.14.2) bu
+ilt for i686-linux-gnu-thread-multi-64int
                :(with 60 registered patches, see perl -V for more det
+ail)
                :
                :Copyright 1987-2011, Larry Wall
                :
                :Perl may be copied only under the terms of either the
+ Artistic License or the
                :GNU General Public License, which may be found in the
+ Perl 5 source kit.
                :
                :Complete documentation for Perl, including FAQ lists,
+ should be found on
                :this system using "man perl" or "perldoc perl".  If y
+ou have access to the
                :Internet, point your browser at http://www.perl.org/,
+ the Perl Home Page.
sitelib         :/usr/local/share/perl/5.14.2
sitelibexp      :/usr/local/share/perl/5.14.2
usesitecustomize:

[download]
So activestate enabled it while the ubuntu variants didnt.

it was Eily that first mentioned the use of these two global variables at Re: Platform Dependence observed in Perl - Hash keys have different format. All i did was to test to see that setting them in sitecustomize.pl (run before "use Data::Dumper;" was seen in the main perl program) would work.

Being main symbol table variables they are like other variables and need the $ to be used as Eily's examples showed. so the code to test them would be 

print "\nUseqq = " . $Data::Dumper::Useqq . "\n";\
print "\nQuotekeys = " . $Data::Dumper::Quotekeys . "\n";

[download]

In reply to Re^5: Platform Dependence observed in Perl - Hash keys have different format by huck
in thread Platform Dependence observed in Perl - Hash keys have different format by rkabhi

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.