On 16/10/2011 00:08, JPH wrote:
I am passin a two-dimensional array to a sub and when the sub returns,
the original array has changed. Eventually I want to pass the array into
a recursive sub, so I want to find a way to circumvent this behaviour.
Notice how my global is "@a" and the sub local is
On 16/10/2011 23:18, Rob Dixon wrote:
On 16/10/2011 19:10, JPH wrote:
Every pass I only change a single character, then I run some tests and
so on.
I wonder if it is possible to write your subroutine by using a single
global array and remembering the change so that you can undo it before
the
On 16/10/2011 19:10, JPH wrote:
On 10/16/2011 04:05 AM, Shawn H Corey wrote:
On 11-10-15 07:44 PM, Rob Dixon wrote:
sub try {
my @b;
foreach my $row (@_) {
push @b, [@$row];
}
:
}
Or you could use dclone() from Storable:
use Storable qw( dclone );
sub try {
my @b = @{ dclone( \@_ ) };
..
Thanks! My script seems to work with dclone.
Though the (deep) recursion takes a lot of time ...
What is your opinion, would it pay off (in performance) when I rewrite the
script in such a way that I do not use dclone, but string manipulation routines
instead? So:
- passing a single dimension
You got me there, John. Indeed I do expect it to contain ' ' and not 0 like I
stated.
If you originally assign " " to $a[ 0 ][ 1 ] why would you now expect it to
contain 0?
John
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JPH wrote:
Hi all,
Hello,
I am passin a two-dimensional array to a sub and when the sub returns,
the original array has changed. Eventually I want to pass the array into
a recursive sub, so I want to find a way to circumvent this behaviour.
Notice how my global is "@a" and the sub local is "
On 11-10-15 07:44 PM, Rob Dixon wrote:
sub try {
my @b;
foreach my $row (@_) {
push @b, [@$row];
}
:
}
Or you could use dclone() from Storable:
use Storable qw( dclone );
sub try {
my @b = @{ dclone( \@_ ) };
...
}
Storable is a standard modul
On 16/10/2011 00:08, JPH wrote:
Hi all,
I am passin a two-dimensional array to a sub and when the sub returns,
the original array has changed. Eventually I want to pass the array into
a recursive sub, so I want to find a way to circumvent this behaviour.
Notice how my global is "@a" and the sub
On Sun, Oct 16, 2011 at 01:08:19AM +0200, JPH wrote:
> Hi all,
>
> I am passin a two-dimensional array to a sub and when the sub
This is your main problem. Perl doesn't have two-dimensional arrays. What it
does have is arrays of array references which, if you squint, can be used as
two-dimensio
Hi all,
I am passin a two-dimensional array to a sub and when the sub returns, the original array has changed. Eventually I want to pass the array into a recursive sub, so I want to find a way to circumvent
this behaviour. Notice how my global is "@a" and the sub local is "@b"
- Why is this hap
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