我需要指导。我一直把我的生活方式转移到了Moose身上。总的来说,我发现驼鹿让生活变得更加有趣和有趣。与此同时,我仍然没有达到一个让我感觉更有成效的地步......可能是因为我一直在抽象中迷失自己,但仍然没有学到足够的东西能够有效地解析moose docs以了解什么其他更聪明的人已经解决了。在驼鹿走进我的生活之前,我做了零OO编程。
这是我的问题:是否有一种简单的方法来共享对象之间的属性(相同的内存位置)?这是不好的做法吗?在下面的AoA示例中,我使用AoA icol属性来访问底层数组中我想要的内容。另一种方法是使属性i和icol引用相同的值(更改一个并更改全部)。我倾向于下面的解决方案,因为它看起来更清晰,但我真的很感激,如果有人会看一看,帮助我提高我的思路。另一个问题:我是否必须在MyArray类中设置ents属性的句柄?我试着评论出来,并且丢失了那些方法。
{
package AoA;
use namespace::autoclean;
use Moose;
has [qw(icol irow)] => (
is => 'rw',
isa => 'Int',
default => 0,
);
has 'rows' => (
traits => ['Array'],
is => 'rw',
isa => 'ArrayRef',
default => sub { [] },
handles => {
add_row => 'push',
get_row => 'get',
set_row => 'set',
all_rows => 'elements',
count_rows => 'count',
},
);
sub get_element {
my $self = shift;
@_ == 2 ?
return $self->get_row($_[0])->get($_[1]) :
return $self->get_row($self->irow)->get($self->icol);
}
sub add_col {
my $self=shift;
my $nrows = $self->count_rows-1;
foreach my $i (0 .. $nrows){
$_[$i] ? $self->rows->[$i]->push($_[$i]) : $self->rows->[$i]->push(undef);
}
}
sub get_col {
my $self = shift;
my $icol = shift || $self->icol;
my $nrows = $self->count_rows-1;
my @column;
foreach (0 .. $nrows){
my $row = $self->get_row($_);
$icol <= $row->count ? push @column, $row->get($icol): push @column, undef;
}
return \@column;
}
__PACKAGE__->meta->make_immutable;
}
{
package MyArray;
use namespace::autoclean;
use Moose;
has 'i' => (
is => 'rw',
isa => 'Int',
default => 0,
);
has 'ents' => (
traits => ['Array'],
is => 'rw',
isa => 'ArrayRef',
default => sub { [] },
handles => {
push => 'push',
get => 'get',
set => 'set',
elements => 'elements',
count => 'count',
},
);
__PACKAGE__->meta->make_immutable;
}
use Modern::Perl;
my $a0 = MyArray->new( ents => [ 0, [ 0, 0, 0 ], [1,2,3] ] ) ;
my $a1 = MyArray->new( ents => [ 1, [ 1, 1, 1 ], [4,5,6] ] ) ;
my $a2 = MyArray->new( ents => [ 2, [ 2, 2, 2 ], [7,8,9] ] ) ;
my $a = AoA->new( rows => [ $a0, $a1] ) ;
$a->add_row($a2);
$a->add_col([3,3,3],[4,4,4],[5,5,5]);
my $row0 = $a->get_row(0);
my $row1 = $a->get_row(1);
my $row2 = $a->get_row(2);
my $element_22 = $a->get_element(2,2);
my $col2 = $a->get_col(1);
use Data::Dumper;
print Dumper $row0;
print Dumper $row1;
print Dumper $row2;
print Dumper $col2;
print Dumper $element_22;
$a0->set(0,'cat');
print Dumper $row0;
1;