I found a problem where I get a different result when printing an array after calling a function, that shouldn't be able to change the array. I got the issue down to this:
use strict;
use warnings;
main();
sub main {
problem([[0,1,2],[3,4,5],[6,7,8]]);
}
sub problem {
print3DArray("\@_",@_);#Output: 0 1 2 3 4 5 6 7 8
reverseArray(@_);
print3DArray("\@_",@_);#Output: 6 7 8 3 4 5 0 1 2
}
sub reverseArray {
for(my $i=0;$i<scalar(@_);$i++){
@{$_[$i]} = reverse @{$_[$i]};
}
}
sub print3DArray {
print shift @_, ":\n";
for(my $i=0;$i<scalar(@_);$i++){
print2DArray(@{$_[$i]});
}
}
sub print2DArray {
for(my $i=0;$i<scalar(@_);$i++){
for(my $j=0;$j<scalar(@{$_[$i]});$j++){
print $_[$i][$j]," ";
}
print "\n";
}
print "\n";
}
@_ should stay the same, since I didn't return anything. I would appreciate any help!
Thanks!