I am trying to create hash table using perl. please can help me because i am begginer to perl and i am reading but i am not able to implement. i need to create hash table from below code data number as a key and description as value.
For a common data format like XML, don't try to do this manually by reading the file line by line and parsing it yourself. Instead, use a perl module to do it for you.
The XML::Simple module may be sufficient for you to start with. I think the module is already installed on your system by default.
use strict; # tip: always use strict and warnings for safety
use warnings;
use Data::Dumper;
use XML::Simple;
my $data = XMLin(\*DATA); # loads up xml into a hash reference assigned to $data
print Dumper $data; # uses Data::Dumper to print entire data structure to console
# the below section emulates a file, accessed via the special DATA file handle
# but you can replace this with an actual file and pass a filename to XMLin()
__DATA__
<DATA>
<!-- removed -->
</DATA>
Now that the xml file is loaded into a hashref, you can access that hash and organise it into the structure that you want.
# loads up xml into a hash reference assigned to $data
my $data = XMLin(\*DATA);
# organise into [testnumber => description] mappings
# not sure if 'Detection' is what you meant by 'description'
my %table = ( $data->{Testnumber} => $data->{Detection} );
The problem with this scenario is that the xml data only contains a single testnumber, which is all this code handles. If you want to handle more than that, then you'll probably need to loop over an array somewhere. I don't know how the xml data will look like if there is more, so I don't know where the array will be.