我想在多级散列引用之后迭代,并希望创建parent->子关系以及拖放功能。以下是我从dumper获取的散列引用。所以我想创建一个部分并显示所有父级和子关系信息,我可以将子项拖放到其父元素中,也可以拖放每个父元素以更改显示顺序。但我首先要正确显示parent->子关系。
哈希如下:
my $hash = {
'4' => {
'forumid' => '136720',
'children' => {
'7' => {
'forumid' => '136997',
'title' => 'under category',
'is_category' => '0',
'parentid' => '136720'
}
},
'title' => 'Android',
'is_category' => '0',
'parentid' => '-1'
},
'1' => {
'forumid' => '136666',
'children' => {
'5' => {
'forumid' => '136954',
'children' => {
'8' => {
'forumid' => '137004',
'title' => 'child of child',
'is_category' => '0',
'parentid' => '136954'
}
},
'title' => 'add child',
'is_category' => '0',
'parentid' => '136666'
}
},
'title' => 'Main Forum',
'is_category' => '0',
'parentid' => '-1'
},
'3' => {
'forumid' => '136719',
'title' => 'Nokia C2-01',
'is_category' => '1',
'parentid' => '-1'
},
'2' => {
'forumid' => '136665',
'children' => {
'6' => {
'forumid' => '136994',
'children' => {
'9' => {
'forumid' => '137012',
'title' => 'another child',
'is_category' => '0',
'parentid' => '136994'
}
},
'title' => 'sub form under test forum',
'is_category' => '0',
'parentid' => '136665'
}
},
'title' => 'test',
'is_category' => '0',
'parentid' => '-1'
}
};
我需要输出如下:
<div id='136666'>Main Forum
<div>
<a href='136954'>add child</a>, <a href='137004'>child of child</a>
</div>
</div>
<div id='136665'>test
<div>
<a href='136994'>sub form under test forum</a>, <a href='137012'>another child</a>
</div>
</div>
<div id='136719'>Nokia C2-01
<div id='136720'>Android
<div>
<a href='136997'>under category</a>
</div>
</div>
</div>
因此应该看起来应该将child添加到用逗号分隔的父元素中:
Main Forum
add child, child of child
test
sub form under test forum, another child
Nokia C2-01
Android
under category
这是创建哈希的函数:
sub subforumsTree {
my $forums = shift;
my $pid = shift || ('-1' || '0');
my $HASH;
foreach my $forum ( @{$forums}){
#next if ($forum->{is_category});
if($forum->{parentid} eq $pid){
$HASH->{$forum->{displayorder}} = {forumid=>$forum->{forumid},parentid=>$forum->{parentid},title=>$forum->{title},is_category=>$forum->{is_category}};
my $children = &subforumsTree( $forums,$forum->{forumid} );
if( $children ) {
$HASH->{$forum->{displayorder}}->{'children'} = $children;
}
}
}
return $HASH;
}
here is the function which I tried for displaying elements:
sub adminforumsList {
my $hash = shift;
my $options = '';
my $iter;
$iter = sub {
my $hash = shift;
my $indent = shift || '';
foreach my $k (sort keys %{$hash}) {
my $v = $hash->{$k};
$options .= "<div id=cat_".$v->{forumid}." class=isDraggable>
<div class='col_buttons right' style='white-space: nowrap'>
<ul class='ipsControlStrip'>
<li class='i_add'>
<a href='#' title='New Forum...'>New Forum...</a>
</li>
<li class='i_edit'>
<a href='#' title='Edit Settings...'>Edit Settings...</a>
</li>
<li class='ipsControlStrip_more ipbmenu' id='menum-26'>
<a href='#'>Options</a>
</li>
</ul>
<ul class='acp-menu' id='menum-26_menucontent' style='display: none'>
<li class='icon info'><a href='#'>Permissions...</a></li>
<li class='icon delete'><a href='#'>Delete Category...</a></li>
<li class='icon edit'><a href='#'>Edit as Forum...</a></li>
<li class='icon view'><a href='#'>Skin Options...</a></li>
</ul>
</div><div class='draghandle'> </div>
<div class='item_info'>
<img src='/images/icons/folder.png' />
<strong class='larger_text'>$v->{title}</strong>
</div>";
$options .= "<div id='cat_wrap_".$v->{forumid}. "' class='item_wrap'>";
$options .= "<div class='item ipsControlRow isDraggable' id='forum_".$v->{forumid}."'>";
$options .= "<table style='width: 100%'>
<tr>
<td style='width: 20px !important; vertical-align: top;'>
<div class='draghandle'> </div>
</td>
<td style=''>
<div class='item_info'>
<strong class='forum_name'>$v->{title}</strong>
<br />
<span class='desctext'>$v->{description}</span>
</div>
</td>
</tr>
</table></div></div></div>";
if ($v->{children}){
$iter->($v->{children}, $indent . "--");
}
}
};
$iter->($hash);
return $options;
}
答案 0 :(得分:0)
您没有显示您尝试过的内容,而您的问题并不完全清楚,这可能意味着您的问题将被关闭。
我不会为你做太多编程,但我建议你研究Perl Object Oriented Programming。
每个论坛都可以是对象,其中一个字段可以是其他论坛的哈希值。如果您已经了解了引用,那么编写OO Perl就不那么难了。通过将每个论坛定义为论坛类的成员,您可以删除在散列哈希值上操作的棘手部分。
我还建议你将问题分解成更小的部分。一旦掌握了代码的基础知识,就可以添加拖放功能。你想输出XML吗?目前还不清楚你要做什么。如果您只想存储结构,可以使用Storable。如果你将它传递给你的论坛结构,它会将整个结构存储在一个文件中,你将能够重新读取它。对于这些类型的任务,可存储比XML更容易使用,它是一个标准模块。
但是,如果您必须使用XML,则应使用Perl中提供的众多XML modules之一