fork download
copy 
  1. use warnings;
  2. use strict;
  3.  
  4. my @array = (1,2,3,4,5);
  5. my $v = 1;
  6.  
  7. sub by_ref 
  8. {
  9.     my ($array_ref,$v) = @_;  
  10.     print "printing: @$array_ref[1]\n";
  11.     @$array_ref = (0,0,0);
  12.     print "Array inside by_ref: @$array_ref\n"; 
  13. }
  14. my @b = @array;
  15. by_ref(\@b,$v);
  16. @array = @b;
  17.  
  18. print "Array changed: @array\n";
Success #stdin #stdout 0s 4684KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
printing: 2
Array inside by_ref: 0 0 0
Array changed: 0 0 0
https://ideone.com/U1lqi
language:
Perl (perl 5.28.1)
created:
11 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!