c:\perl\perl>perl -de 0

Loading DB routines from perl5db.pl version 1.19
Editor support available.

Enter h or `h h' for help, or `perldoc perldebug' for more help.

main::(-e:1):   0
  DB<1> use strict

  DB<2> use warnings

  DB<3> our %hash = { 'key1' => 'val1', 'key2' => 'val2' };

  DB<4> x \%hash
0  HASH(0x1cbd91c)
   'HASH(0x1ca1f4c)' => undef

##</code><code>##

  DB<5> %hash = ( 'key1' => 'val1', 'key2' => 'val2' );

  DB<6> x \%hash
0  HASH(0x1cbd91c)
   'key1' => 'val1'
   'key2' => 'val2'
  DB<7>

##</code><code>##

print {"key"=>"value"}, "\n";