in reply to Re^2: Empty string checking in output
in thread Empty string checking in output

... the in array @output doesn't contain anything but ... the else block is not executing ...

... because, contrary to what you think, the  @output array contains something. Try printing/dumping the contents of the array. Also, what code are you actually running? 

>perl -wMstrict -le
"my @output = ();
 ;;
 if (@output) {
   print qq{true clause: array not empty};
   }
 else {
   print qq{false clause: array empty};
   }
"
false clause: array empty

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Re^4: Empty string checking in output
by Kumar Mantri (Novice) on Aug 17, 2011 at 09:12 UTC

    yes,i executed the block of code above its printing "true clause: array not empty" but how to find exactly what is there in that?i wrote dis code to check a configuration in cisco devices.

[reply]

      One way (there are many 'data dumpers'). Note: you must pass a reference to the array to the Dumper function. 

      >perl -wMstrict -le
"use Data::Dumper;
 my @output = qw(1 2 foo);
 print Dumper \@output;
"
$VAR1 = [
          '1',
          '2',
          'foo'
        ];

      [download]

      See Data::Dumper.

[reply]
[d/l]
[select]
        Thank you,let me learn and try this..i just want to ask one question ,is there any mistake in my code regarding about not executing the else block?
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