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Raku bindings to the libxml2 native library

[Raku LibXML Project] / [LibXML Module] / HashMap

class LibXML::HashMap

Bindings to xmlHashTable


my LibXML::HashMap $obj-hash .= new;
my LibXML::HashMap[Pointer] $ptr-hash .= new;
my LibXML::HashMap[UInt] $int-hash .= new;
my LibXML::HashMap[Str] $str-hash .= new;
my LibXML::HashMap[LibXML::Item] $item-hash .= new;
my LibXML::HashMap[LibXML::Node::Set] $set-hash .= new;
$set-hash = $node.findnodes($expr).Hash;
$set-hash = $node.childNodes().Hash;
# etc...

$obj-hash<element> ='test');
$obj-hash<number> = 42e0;
$obj-hash<string> = 'test';
$obj-hash<bool> = True;

say $obj-hash<element>.tagName;


This module uses an xmlHashTable object as a raw hash-like store.

Both LibXML::Node::Set and LibXML::Node::List objects have a Hash() method that returns a LibXML::HashMap[LibXML::Node::Set] object. For example

use LibXML::HashMap;
use LibXML::Document;
use LibXML::Node::Set;

my LibXML::Document $doc .= parse: "example/dromeds.xml";
my LibXML::HashMap[LibXML::Node::Set] $nodes = $doc.findnodes('//*').Hash;
# -OR-
$nodes = $doc.getElementsByTagName('*').Hash;
say $nodes<species>[1]<@name>.Str;

This is the nodes in the set or list collated by tag-name.

Several container types are available:


method new

my LibXML::HashMap $obj-hash .= new();
my LibXML::HashMap[type] $type-hash .= new();

By default XPath Objects are used to containerize and store strings, floats, booleans or node-sets.

The other container types, UInt, Str, LibXML::Item and LibXML::Node::Set store values directly, without using an intermediate XPath objects.

method of

method of() returns Any

Returns the container type for the LibXML::HashMap object.

method elems

method elems() returns UInt

Returns the number of stored elements.

method keys

method keys() returns Seq

Returns hash keys as a sequence of strings.

method values

method values() returns Seq

Returns hash values as a sequence.

method pairs

method pairs() returns Seq

Returns key values pairs as a sequence.

method kv

method kv() returns Seq

Returns alternating keys and values as a sequence.


method Hash() returns Hash

Coerces to a Raku Hash object.


method EXISTS-KEY(Str() $key) returns Bool
say $h.EXISTS-KEY('foo');
say $h<foo>:exists;

Returns True if an object exists at the given key

method AT-KEY

method AT-KEY(Str() $key) returns Any
say $h.AT-KEY('foo');
say $h<foo>;

Returns the object at the given key


method ASSIGN-KEY(Str() $key, Any $value) returns Any
say $h.ASSIGN-KEY('foo', 42);
$h<foo> = 42;

Stores an object at the given key


method DELETE-KEY(Str() $key) returns Any
say $h.DELETE-KEY('foo');

Removes the object at the given key