Printing array in perl mason












0















I am new to Perl Mason and I am trying to print an array. I tried several ways, explored the web but nothing seems to work.



I tried - 



my $arr = getArray();

print "Array : $arr"; # prints "Array : ARRAY(0xcd421774)"

my $size = scalar $arr;

print "Size : $size"; # prints "size ARRAY(0xcd421774)"


I also tried to print the first element of the array



print "Element : $arr[0]"; # throws error "Global symbol "@arr" requires explicit package name at ..."





arrays perl mason







share|improve this question



























    0















    I am new to Perl Mason and I am trying to print an array. I tried several ways, explored the web but nothing seems to work.



    I tried - 



    my $arr = getArray();
    
print "Array : $arr"; # prints "Array : ARRAY(0xcd421774)"
    
my $size = scalar $arr;
    
print "Size : $size"; # prints "size ARRAY(0xcd421774)"


    I also tried to print the first element of the array



    print "Element : $arr[0]"; # throws error "Global symbol "@arr" requires explicit package name at ..."





    arrays perl mason







    share|improve this question

























      0












      0








      0








      I am new to Perl Mason and I am trying to print an array. I tried several ways, explored the web but nothing seems to work.



      I tried - 



      my $arr = getArray();
      
print "Array : $arr"; # prints "Array : ARRAY(0xcd421774)"
      
my $size = scalar $arr;
      
print "Size : $size"; # prints "size ARRAY(0xcd421774)"


      I also tried to print the first element of the array



      print "Element : $arr[0]"; # throws error "Global symbol "@arr" requires explicit package name at ..."





      arrays perl mason







      share|improve this question














      I am new to Perl Mason and I am trying to print an array. I tried several ways, explored the web but nothing seems to work.



      I tried - 



      my $arr = getArray();
      
print "Array : $arr"; # prints "Array : ARRAY(0xcd421774)"
      
my $size = scalar $arr;
      
print "Size : $size"; # prints "size ARRAY(0xcd421774)"


      I also tried to print the first element of the array



      print "Element : $arr[0]"; # throws error "Global symbol "@arr" requires explicit package name at ..."





      arrays perl mason




      arrays perl mason






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Apr 3 '14 at 17:45









      KevindraKevindra

      82511139




      82511139
























          2 Answers
          2






          active

          oldest

          votes


















          3














          Your $arr is an array reference. You need to dereference it with the @{ … } operator: @{ $arr } or the shorthand @$arr.



          my $arr = getArray();
          
print "Array : @$arr";
          
my $size = scalar @$arr;
          
print "Size : $size";


          To access one element: ${ $arr }[0] or the shorthands $$arr[0] or $arr->[0], of which the last form should be preferred.



          To learn more about Perl references, read perldoc perlreftut.






          share|improve this answer


























          • Thanks a lot @amon, it works now.

            – Kevindra
            Apr 3 '14 at 17:57



















          4














          I am not familiar with Perl Mason but it seems like getArray() does not return an array. It might be returning an array reference. I thought that's the reason why you assign it to a scalar variable $arr, not @arr;



          You can confirm this using Data::Dumper



          use Data::Dumper;
          
print Dumper $arr;


          or ref.



          if (ref($r) eq "ARRAY")


          If it's indeed an array reference, you can access the first element like this:



          $arr->[0];


          Print the array like this:



          print "Array : @$arr";


          And get its size like this:



          my $size = scalar @$arr;





          share|improve this answer

























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            2 Answers
            2






            active

            oldest

            votes








            2 Answers
            2






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes









            3














            Your $arr is an array reference. You need to dereference it with the @{ … } operator: @{ $arr } or the shorthand @$arr.



            my $arr = getArray();
            
print "Array : @$arr";
            
my $size = scalar @$arr;
            
print "Size : $size";


            To access one element: ${ $arr }[0] or the shorthands $$arr[0] or $arr->[0], of which the last form should be preferred.



            To learn more about Perl references, read perldoc perlreftut.






            share|improve this answer


























            • Thanks a lot @amon, it works now.

              – Kevindra
              Apr 3 '14 at 17:57
















            3














            Your $arr is an array reference. You need to dereference it with the @{ … } operator: @{ $arr } or the shorthand @$arr.



            my $arr = getArray();
            
print "Array : @$arr";
            
my $size = scalar @$arr;
            
print "Size : $size";


            To access one element: ${ $arr }[0] or the shorthands $$arr[0] or $arr->[0], of which the last form should be preferred.



            To learn more about Perl references, read perldoc perlreftut.






            share|improve this answer


























            • Thanks a lot @amon, it works now.

              – Kevindra
              Apr 3 '14 at 17:57














            3












            3








            3







            Your $arr is an array reference. You need to dereference it with the @{ … } operator: @{ $arr } or the shorthand @$arr.



            my $arr = getArray();
            
print "Array : @$arr";
            
my $size = scalar @$arr;
            
print "Size : $size";


            To access one element: ${ $arr }[0] or the shorthands $$arr[0] or $arr->[0], of which the last form should be preferred.



            To learn more about Perl references, read perldoc perlreftut.






            share|improve this answer















            Your $arr is an array reference. You need to dereference it with the @{ … } operator: @{ $arr } or the shorthand @$arr.



            my $arr = getArray();
            
print "Array : @$arr";
            
my $size = scalar @$arr;
            
print "Size : $size";


            To access one element: ${ $arr }[0] or the shorthands $$arr[0] or $arr->[0], of which the last form should be preferred.



            To learn more about Perl references, read perldoc perlreftut.







            share|improve this answer














            share|improve this answer



            share|improve this answer








            edited Apr 3 '14 at 18:00

























            answered Apr 3 '14 at 17:51









            amonamon

            52.6k270126




            52.6k270126













            • Thanks a lot @amon, it works now.

              – Kevindra
              Apr 3 '14 at 17:57



















            • Thanks a lot @amon, it works now.

              – Kevindra
              Apr 3 '14 at 17:57

















            Thanks a lot @amon, it works now.

            – Kevindra
            Apr 3 '14 at 17:57





            Thanks a lot @amon, it works now.

            – Kevindra
            Apr 3 '14 at 17:57













            4














            I am not familiar with Perl Mason but it seems like getArray() does not return an array. It might be returning an array reference. I thought that's the reason why you assign it to a scalar variable $arr, not @arr;



            You can confirm this using Data::Dumper



            use Data::Dumper;
            
print Dumper $arr;


            or ref.



            if (ref($r) eq "ARRAY")


            If it's indeed an array reference, you can access the first element like this:



            $arr->[0];


            Print the array like this:



            print "Array : @$arr";


            And get its size like this:



            my $size = scalar @$arr;





            share|improve this answer






























              4














              I am not familiar with Perl Mason but it seems like getArray() does not return an array. It might be returning an array reference. I thought that's the reason why you assign it to a scalar variable $arr, not @arr;



              You can confirm this using Data::Dumper



              use Data::Dumper;
              
print Dumper $arr;


              or ref.



              if (ref($r) eq "ARRAY")


              If it's indeed an array reference, you can access the first element like this:



              $arr->[0];


              Print the array like this:



              print "Array : @$arr";


              And get its size like this:



              my $size = scalar @$arr;





              share|improve this answer




























                4












                4








                4







                I am not familiar with Perl Mason but it seems like getArray() does not return an array. It might be returning an array reference. I thought that's the reason why you assign it to a scalar variable $arr, not @arr;



                You can confirm this using Data::Dumper



                use Data::Dumper;
                
print Dumper $arr;


                or ref.



                if (ref($r) eq "ARRAY")


                If it's indeed an array reference, you can access the first element like this:



                $arr->[0];


                Print the array like this:



                print "Array : @$arr";


                And get its size like this:



                my $size = scalar @$arr;





                share|improve this answer















                I am not familiar with Perl Mason but it seems like getArray() does not return an array. It might be returning an array reference. I thought that's the reason why you assign it to a scalar variable $arr, not @arr;



                You can confirm this using Data::Dumper



                use Data::Dumper;
                
print Dumper $arr;


                or ref.



                if (ref($r) eq "ARRAY")


                If it's indeed an array reference, you can access the first element like this:



                $arr->[0];


                Print the array like this:



                print "Array : @$arr";


                And get its size like this:



                my $size = scalar @$arr;






                share|improve this answer














                share|improve this answer



                share|improve this answer








                edited Apr 3 '14 at 18:00

























                answered Apr 3 '14 at 17:52









                Carlisle18Carlisle18

                299210




                299210






























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