Posted by admin | Posted in Cookbooks for Bar B Cues | Posted on 04-06-2008
Tags: choice menus cookbook, cooking, css, food, million menus cookbook, recipes, webdesign
sorting in perl..part2?
wen i call this function
print pre Dumper %elements; #i get this back.
$VAR1 = ’25′; #<-id
$VAR2 = {
'price' => ’45.00′,
‘title’ => ‘asdasdasd’
};
$VAR3 = ’4′;
$VAR4 = {
‘price’ => ’44.95′,
‘title’ => ‘Java Servlet & JSP Cookbook’
};
$VAR5 = ’1′;
$VAR6 = {
‘price’ => ’103.00′,
‘title’ => ‘Operating Systems Design and
Implementation, 3/E’
};
.so in order to display the title and the price in a pop up menu. i do this..
my @values;
my %labels;
foreach (keys %elements)
{
push(@values, $_);
my $title = $elements{$_}{title};
my $price = $elements{$_}{price};
$labels{$_} = “$title ($$price)”;
}
print
popup_menu( {
name => ‘id’,
values => @values,
labels => %labels,
ononchange => ‘submit()’, # JavaScript event handler
} );
#how wud i have the pop up menu sorted by the title?
Firstly, sorting a hash isn’t exactly the most ideal situation, it would be better if each item was a hashref in an array:
@books = (
{ id => 1, title => ‘foo’, price => ’2.99′ },
# etc…
);
however, it can be done by using the key to look up the title in the hash via a custom sort routine (e.g $books{ $a }->{ title }).
—
use strict;
use warnings;
use CGI qw( :all );
my %books = (
4 => {
‘price’ => ’44.95′,
‘title’ => ‘Java Servlet & JSP Cookbook’
},
1 => {
‘price’ => ’103.00′,
‘title’ => ‘Operating Systems Design and Implementation, 3/E’
},
25 => {
‘price’ => ’45.00′,
‘title’ => ‘asdasdasd’
}
);
my( %labels, @values );
my @items = sort { lc $books{ $a }->{ title } cmp lc $books{ $b }->{ title } } keys %books;
foreach my $key ( @items ) {
my $item = $books{ $key };
push @values, $key;
$labels{ $key } = sprintf( ‘%s ($%s)’, $item->{ title }, $item->{ price } );
}
print popup_menu( {
name => ‘id’,
values => @values,
labels => %labels,
ononchange => ‘submit()’
} );
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