Mojo::DOM58 - Minimalistic HTML/XML DOM parser with CSS selectors
use Mojo::DOM58; # Parse my $dom = Mojo::DOM58->new('<div><p id="a">Test</p><p id="b">123</p></div>'); # Find say $dom->at('#b')->text; say $dom->find('p')->map('text')->join("\n"); say $dom->find('[id]')->map(attr => 'id')->join("\n"); # Iterate $dom->find('p[id]')->reverse->each(sub { say $_->{id} }); # Loop for my $e ($dom->find('p[id]')->each) { say $e->{id}, ':', $e->text; } # Modify $dom->find('div p')->last->append('<p id="c">456</p>'); $dom->find(':not(p)')->map('strip'); # Render say "$dom";
Mojo::DOM58 is a minimalistic and relaxed pure-perl HTML/XML DOM parser based on Mojo::DOM. It supports the HTML Living Standard and Extensible Markup Language (XML) 1.0, and matching based on CSS3 selectors. It will even try to interpret broken HTML and XML, so you should not use it for validation.
Mojo::DOM58 is a fork of Mojo::DOM and tracks features and fixes to stay closely compatible with upstream. It differs only in the standalone format and compatibility with Perl 5.8. Any bugs or patches not related to these changes should be reported directly to the Mojolicious issue tracker.
This release of Mojo::DOM58 is up to date with version 7.55 of Mojolicious.
7.55
When we parse an HTML/XML fragment, it gets turned into a tree of nodes.
<!DOCTYPE html> <html> <head><title>Hello</title></head> <body>World!</body> </html>
There are currently eight different kinds of nodes, cdata, comment, doctype, pi, raw, root, tag and text. Elements are nodes of the type tag.
cdata
comment
doctype
pi
raw
root
tag
text
root |- doctype (html) +- tag (html) |- tag (head) | +- tag (title) | +- raw (Hello) +- tag (body) +- text (World!)
While all node types are represented as Mojo::DOM58 objects, some methods like "attr" and "namespace" only apply to elements.
Mojo::DOM58 defaults to HTML semantics, that means all tags and attribute names are lowercased and selectors need to be lowercase as well.
# HTML semantics my $dom = Mojo::DOM58->new('<P ID="greeting">Hi!</P>'); say $dom->at('p[id]')->text;
If an XML declaration is found, the parser will automatically switch into XML mode and everything becomes case-sensitive.
# XML semantics my $dom = Mojo::DOM58->new('<?xml version="1.0"?><P ID="greeting">Hi!</P>'); say $dom->at('P[ID]')->text;
HTML or XML semantics can also be forced with the "xml" method.
# Force HTML semantics my $dom = Mojo::DOM58->new->xml(0)->parse('<P ID="greeting">Hi!</P>'); say $dom->at('p[id]')->text; # Force XML semantics my $dom = Mojo::DOM58->new->xml(1)->parse('<P ID="greeting">Hi!</P>'); say $dom->at('P[ID]')->text;
Mojo::DOM58 uses a CSS selector engine based on Mojo::DOM::CSS. All CSS selectors that make sense for a standalone parser are supported.
Any element.
my $all = $dom->find('*');
An element of type E.
E
my $title = $dom->at('title');
An E element with a foo attribute.
foo
my $links = $dom->find('a[href]');
An E element whose foo attribute value is exactly equal to bar.
bar
my $case_sensitive = $dom->find('input[type="hidden"]'); my $case_sensitive = $dom->find('input[type=hidden]');
An E element whose foo attribute value is exactly equal to any (ASCII-range) case-permutation of bar. Note that this selector is EXPERIMENTAL and might change without warning!
my $case_insensitive = $dom->find('input[type="hidden" i]'); my $case_insensitive = $dom->find('input[type=hidden i]'); my $case_insensitive = $dom->find('input[class~="foo" i]');
This selector is part of Selectors Level 4, which is still a work in progress.
An E element whose foo attribute value is a list of whitespace-separated values, one of which is exactly equal to bar.
my $foo = $dom->find('input[class~="foo"]'); my $foo = $dom->find('input[class~=foo]');
An E element whose foo attribute value begins exactly with the string bar.
my $begins_with = $dom->find('input[name^="f"]'); my $begins_with = $dom->find('input[name^=f]');
An E element whose foo attribute value ends exactly with the string bar.
my $ends_with = $dom->find('input[name$="o"]'); my $ends_with = $dom->find('input[name$=o]');
An E element whose foo attribute value contains the substring bar.
my $contains = $dom->find('input[name*="fo"]'); my $contains = $dom->find('input[name*=fo]');
An E element, root of the document.
my $root = $dom->at(':root');
An E element, the n-th child of its parent.
n-th
my $third = $dom->find('div:nth-child(3)'); my $odd = $dom->find('div:nth-child(odd)'); my $even = $dom->find('div:nth-child(even)'); my $top3 = $dom->find('div:nth-child(-n+3)');
An E element, the n-th child of its parent, counting from the last one.
my $third = $dom->find('div:nth-last-child(3)'); my $odd = $dom->find('div:nth-last-child(odd)'); my $even = $dom->find('div:nth-last-child(even)'); my $bottom3 = $dom->find('div:nth-last-child(-n+3)');
An E element, the n-th sibling of its type.
my $third = $dom->find('div:nth-of-type(3)'); my $odd = $dom->find('div:nth-of-type(odd)'); my $even = $dom->find('div:nth-of-type(even)'); my $top3 = $dom->find('div:nth-of-type(-n+3)');
An E element, the n-th sibling of its type, counting from the last one.
my $third = $dom->find('div:nth-last-of-type(3)'); my $odd = $dom->find('div:nth-last-of-type(odd)'); my $even = $dom->find('div:nth-last-of-type(even)'); my $bottom3 = $dom->find('div:nth-last-of-type(-n+3)');
An E element, first child of its parent.
my $first = $dom->find('div p:first-child');
An E element, last child of its parent.
my $last = $dom->find('div p:last-child');
An E element, first sibling of its type.
my $first = $dom->find('div p:first-of-type');
An E element, last sibling of its type.
my $last = $dom->find('div p:last-of-type');
An E element, only child of its parent.
my $lonely = $dom->find('div p:only-child');
An E element, only sibling of its type.
my $lonely = $dom->find('div p:only-of-type');
An E element that has no children (including text nodes).
my $empty = $dom->find(':empty');
A user interface element E which is checked (for instance a radio-button or checkbox).
my $input = $dom->find(':checked');
An E element whose class is "warning".
my $warning = $dom->find('div.warning');
An E element with ID equal to "myid".
ID
my $foo = $dom->at('div#foo');
An E element that does not match either compound selector s1 or compound selector s2. Note that support for compound selectors is EXPERIMENTAL and might change without warning!
s1
s2
my $others = $dom->find('div p:not(:first-child, :last-child)');
Support for compound selectors was added as part of Selectors Level 4, which is still a work in progress.
An E element that matches compound selector s1 and/or compound selector s2. Note that this selector is EXPERIMENTAL and might change without warning!
my $headers = $dom->find(':matches(section, article, aside, nav) h1');
An F element descendant of an E element.
F
my $headlines = $dom->find('div h1');
An F element child of an E element.
my $headlines = $dom->find('html > body > div > h1');
An F element immediately preceded by an E element.
my $second = $dom->find('h1 + h2');
An F element preceded by an E element.
my $second = $dom->find('h1 ~ h2');
Elements of type E, F and G.
G
my $headlines = $dom->find('h1, h2, h3');
An E element whose attributes match all following attribute selectors.
my $links = $dom->find('a[foo^=b][foo$=ar]');
Mojo::DOM58 overloads the following operators.
my @nodes = @$dom;
Alias for "child_nodes".
# "<!-- Test -->" $dom->parse('<!-- Test --><b>123</b>')->[0];
my $bool = !!$dom;
Always true.
my %attrs = %$dom;
Alias for "attr".
# "test" $dom->parse('<div id="test">Test</div>')->at('div')->{id};
my $str = "$dom";
Alias for "to_string".
Mojo::DOM58 implements the following methods.
my $dom = Mojo::DOM58->new; my $dom = Mojo::DOM58->new('<foo bar="baz">I ♥ Mojo::DOM58!</foo>');
Construct a new scalar-based Mojo::DOM58 object and "parse" HTML/XML fragment if necessary.
my $text = $dom->all_text;
Extract text content from all descendant nodes of this element.
# "foo\nbarbaz\n" $dom->parse("<div>foo\n<p>bar</p>baz\n</div>")->at('div')->all_text;
my $collection = $dom->ancestors; my $collection = $dom->ancestors('div ~ p');
Find all ancestor elements of this node matching the CSS selector and return a collection containing these elements as Mojo::DOM58 objects. All selectors listed in "SELECTORS" are supported.
# List tag names of ancestor elements say $dom->ancestors->map('tag')->join("\n");
$dom = $dom->append('<p>I ♥ Mojo::DOM58!</p>');
Append HTML/XML fragment to this node (for all node types other than root).
# "<div><h1>Test</h1><h2>123</h2></div>" $dom->parse('<div><h1>Test</h1></div>') ->at('h1')->append('<h2>123</h2>')->root; # "<p>Test 123</p>" $dom->parse('<p>Test</p>')->at('p') ->child_nodes->first->append(' 123')->root;
$dom = $dom->append_content('<p>I ♥ Mojo::DOM58!</p>');
Append HTML/XML fragment (for root and tag nodes) or raw content to this node's content.
# "<div><h1>Test123</h1></div>" $dom->parse('<div><h1>Test</h1></div>') ->at('h1')->append_content('123')->root; # "<!-- Test 123 --><br>" $dom->parse('<!-- Test --><br>') ->child_nodes->first->append_content('123 ')->root; # "<p>Test<i>123</i></p>" $dom->parse('<p>Test</p>')->at('p')->append_content('<i>123</i>')->root;
my $result = $dom->at('div ~ p');
Find first descendant element of this element matching the CSS selector and return it as a Mojo::DOM58 object, or undef if none could be found. All selectors listed in "SELECTORS" are supported.
undef
# Find first element with "svg" namespace definition my $namespace = $dom->at('[xmlns\:svg]')->{'xmlns:svg'};
my $hash = $dom->attr; my $foo = $dom->attr('foo'); $dom = $dom->attr({foo => 'bar'}); $dom = $dom->attr(foo => 'bar');
This element's attributes.
# Remove an attribute delete $dom->attr->{id}; # Attribute without value $dom->attr(selected => undef); # List id attributes say $dom->find('*')->map(attr => 'id')->compact->join("\n");
my $collection = $dom->child_nodes;
Return a collection containing all child nodes of this element as Mojo::DOM58 objects.
# "<p><b>123</b></p>" $dom->parse('<p>Test<b>123</b></p>')->at('p')->child_nodes->first->remove; # "<!DOCTYPE html>" $dom->parse('<!DOCTYPE html><b>123</b>')->child_nodes->first; # " Test " $dom->parse('<b>123</b><!-- Test -->')->child_nodes->last->content;
my $collection = $dom->children; my $collection = $dom->children('div ~ p');
Find all child elements of this element matching the CSS selector and return a collection containing these elements as Mojo::DOM58 objects. All selectors listed in "SELECTORS" are supported.
# Show tag name of random child element say $dom->children->shuffle->first->tag;
my $str = $dom->content; $dom = $dom->content('<p>I ♥ Mojo::DOM58!</p>');
Return this node's content or replace it with HTML/XML fragment (for root and tag nodes) or raw content.
# "<b>Test</b>" $dom->parse('<div><b>Test</b></div>')->at('div')->content; # "<div><h1>123</h1></div>" $dom->parse('<div><h1>Test</h1></div>')->at('h1')->content('123')->root; # "<p><i>123</i></p>" $dom->parse('<p>Test</p>')->at('p')->content('<i>123</i>')->root; # "<div><h1></h1></div>" $dom->parse('<div><h1>Test</h1></div>')->at('h1')->content('')->root; # " Test " $dom->parse('<!-- Test --><br>')->child_nodes->first->content; # "<div><!-- 123 -->456</div>" $dom->parse('<div><!-- Test -->456</div>') ->at('div')->child_nodes->first->content(' 123 ')->root;
my $collection = $dom->descendant_nodes;
Return a collection containing all descendant nodes of this element as Mojo::DOM58 objects.
# "<p><b>123</b></p>" $dom->parse('<p><!-- Test --><b>123<!-- 456 --></b></p>') ->descendant_nodes->grep(sub { $_->type eq 'comment' }) ->map('remove')->first; # "<p><b>test</b>test</p>" $dom->parse('<p><b>123</b>456</p>') ->at('p')->descendant_nodes->grep(sub { $_->type eq 'text' }) ->map(content => 'test')->first->root;
my $collection = $dom->find('div ~ p');
Find all descendant elements of this element matching the CSS selector and return a collection containing these elements as Mojo::DOM58 objects. All selectors listed in "SELECTORS" are supported.
# Find a specific element and extract information my $id = $dom->find('div')->[23]{id}; # Extract information from multiple elements my @headers = $dom->find('h1, h2, h3')->map('text')->each; # Count all the different tags my $hash = $dom->find('*')->reduce(sub { $a->{$b->tag}++; $a }, {}); # Find elements with a class that contains dots my @divs = $dom->find('div.foo\.bar')->each;
my $collection = $dom->following; my $collection = $dom->following('div ~ p');
Find all sibling elements after this node matching the CSS selector and return a collection containing these elements as Mojo::DOM58 objects. All selectors listed in "SELECTORS" are supported.
# List tags of sibling elements after this node say $dom->following->map('tag')->join("\n");
my $collection = $dom->following_nodes;
Return a collection containing all sibling nodes after this node as Mojo::DOM58 objects.
# "C" $dom->parse('<p>A</p><!-- B -->C')->at('p')->following_nodes->last->content;
my $bool = $dom->matches('div ~ p');
Check if this element matches the CSS selector. All selectors listed in "SELECTORS" are supported.
# True $dom->parse('<p class="a">A</p>')->at('p')->matches('.a'); $dom->parse('<p class="a">A</p>')->at('p')->matches('p[class]'); # False $dom->parse('<p class="a">A</p>')->at('p')->matches('.b'); $dom->parse('<p class="a">A</p>')->at('p')->matches('p[id]');
my $namespace = $dom->namespace;
Find this element's namespace, or return undef if none could be found.
# Find namespace for an element with namespace prefix my $namespace = $dom->at('svg > svg\:circle')->namespace; # Find namespace for an element that may or may not have a namespace prefix my $namespace = $dom->at('svg > circle')->namespace;
my $sibling = $dom->next;
Return Mojo::DOM58 object for next sibling element, or undef if there are no more siblings.
# "<h2>123</h2>" $dom->parse('<div><h1>Test</h1><h2>123</h2></div>')->at('h1')->next;
my $sibling = $dom->next_node;
Return Mojo::DOM58 object for next sibling node, or undef if there are no more siblings.
# "456" $dom->parse('<p><b>123</b><!-- Test -->456</p>') ->at('b')->next_node->next_node; # " Test " $dom->parse('<p><b>123</b><!-- Test -->456</p>') ->at('b')->next_node->content;
my $parent = $dom->parent;
Return Mojo::DOM58 object for parent of this node, or undef if this node has no parent.
# "<b><i>Test</i></b>" $dom->parse('<p><b><i>Test</i></b></p>')->at('i')->parent;
$dom = $dom->parse('<foo bar="baz">I ♥ Mojo::DOM58!</foo>');
Parse HTML/XML fragment.
# Parse XML my $dom = Mojo::DOM58->new->xml(1)->parse('<foo>I ♥ Mojo::DOM58!</foo>');
my $collection = $dom->preceding; my $collection = $dom->preceding('div ~ p');
Find all sibling elements before this node matching the CSS selector and return a collection containing these elements as Mojo::DOM58 objects. All selectors listed in "SELECTORS" are supported.
# List tags of sibling elements before this node say $dom->preceding->map('tag')->join("\n");
my $collection = $dom->preceding_nodes;
Return a collection containing all sibling nodes before this node as Mojo::DOM58 objects.
# "A" $dom->parse('A<!-- B --><p>C</p>')->at('p')->preceding_nodes->first->content;
$dom = $dom->prepend('<p>I ♥ Mojo::DOM58!</p>');
Prepend HTML/XML fragment to this node (for all node types other than root).
# "<div><h1>Test</h1><h2>123</h2></div>" $dom->parse('<div><h2>123</h2></div>') ->at('h2')->prepend('<h1>Test</h1>')->root; # "<p>Test 123</p>" $dom->parse('<p>123</p>') ->at('p')->child_nodes->first->prepend('Test ')->root;
$dom = $dom->prepend_content('<p>I ♥ Mojo::DOM58!</p>');
Prepend HTML/XML fragment (for root and tag nodes) or raw content to this node's content.
# "<div><h2>Test123</h2></div>" $dom->parse('<div><h2>123</h2></div>') ->at('h2')->prepend_content('Test')->root; # "<!-- Test 123 --><br>" $dom->parse('<!-- 123 --><br>') ->child_nodes->first->prepend_content(' Test')->root; # "<p><i>123</i>Test</p>" $dom->parse('<p>Test</p>')->at('p')->prepend_content('<i>123</i>')->root;
my $sibling = $dom->previous;
Return Mojo::DOM58 object for previous sibling element, or undef if there are no more siblings.
# "<h1>Test</h1>" $dom->parse('<div><h1>Test</h1><h2>123</h2></div>')->at('h2')->previous;
my $sibling = $dom->previous_node;
Return Mojo::DOM58 object for previous sibling node, or undef if there are no more siblings.
# "123" $dom->parse('<p>123<!-- Test --><b>456</b></p>') ->at('b')->previous_node->previous_node; # " Test " $dom->parse('<p>123<!-- Test --><b>456</b></p>') ->at('b')->previous_node->content;
my $parent = $dom->remove;
Remove this node and return "root" (for root nodes) or "parent".
# "<div></div>" $dom->parse('<div><h1>Test</h1></div>')->at('h1')->remove; # "<p><b>456</b></p>" $dom->parse('<p>123<b>456</b></p>') ->at('p')->child_nodes->first->remove->root;
my $parent = $dom->replace('<div>I ♥ Mojo::DOM58!</div>');
Replace this node with HTML/XML fragment and return "root" (for root nodes) or "parent".
# "<div><h2>123</h2></div>" $dom->parse('<div><h1>Test</h1></div>')->at('h1')->replace('<h2>123</h2>'); # "<p><b>123</b></p>" $dom->parse('<p>Test</p>') ->at('p')->child_nodes->[0]->replace('<b>123</b>')->root;
my $root = $dom->root;
Return Mojo::DOM58 object for root node.
my $parent = $dom->strip;
Remove this element while preserving its content and return "parent".
# "<div>Test</div>" $dom->parse('<div><h1>Test</h1></div>')->at('h1')->strip;
my $tag = $dom->tag; $dom = $dom->tag('div');
This element's tag name.
# List tag names of child elements say $dom->children->map('tag')->join("\n");
$dom = $dom->tap(sub {...});
Equivalent to "tap" in Mojo::Base.
my $text = $dom->text;
Extract text content from this element only (not including child elements).
# "bar" $dom->parse("<div>foo<p>bar</p>baz</div>")->at('p')->text; # "foo\nbaz\n" $dom->parse("<div>foo\n<p>bar</p>baz\n</div>")->at('div')->text;
my $str = $dom->to_string;
Render this node and its content to HTML/XML.
# "<b>Test</b>" $dom->parse('<div><b>Test</b></div>')->at('div b')->to_string;
my $tree = $dom->tree; $dom = $dom->tree(['root']);
Document Object Model. Note that this structure should only be used very carefully since it is very dynamic.
my $type = $dom->type;
This node's type, usually cdata, comment, doctype, pi, raw, root, tag or text.
# "cdata" $dom->parse('<![CDATA[Test]]>')->child_nodes->first->type; # "comment" $dom->parse('<!-- Test -->')->child_nodes->first->type; # "doctype" $dom->parse('<!DOCTYPE html>')->child_nodes->first->type; # "pi" $dom->parse('<?xml version="1.0"?>')->child_nodes->first->type; # "raw" $dom->parse('<title>Test</title>')->at('title')->child_nodes->first->type; # "root" $dom->parse('<p>Test</p>')->type; # "tag" $dom->parse('<p>Test</p>')->at('p')->type; # "text" $dom->parse('<p>Test</p>')->at('p')->child_nodes->first->type;
my $value = $dom->val;
Extract value from form element (such as button, input, option, select and textarea), or return undef if this element has no value. In the case of select with multiple attribute, find option elements with selected attribute and return an array reference with all values, or undef if none could be found.
button
input
option
select
textarea
multiple
selected
# "a" $dom->parse('<input name=test value=a>')->at('input')->val; # "b" $dom->parse('<textarea>b</textarea>')->at('textarea')->val; # "c" $dom->parse('<option value="c">Test</option>')->at('option')->val; # "d" $dom->parse('<select><option selected>d</option></select>') ->at('select')->val; # "e" $dom->parse('<select multiple><option selected>e</option></select>') ->at('select')->val->[0]; # "on" $dom->parse('<input name=test type=checkbox>')->at('input')->val;
my $new_class = Mojo::DOM58->with_roles('Mojo::DOM58::Role::One'); my $new_class = Mojo::DOM58->with_roles('+One', '+Two'); $dom = $dom->with_roles('+One', '+Two');
Equivalent to "with_roles" in Mojo::Base. Note that role support depends on Role::Tiny (2.000001+).
$dom = $dom->wrap('<div></div>');
Wrap HTML/XML fragment around this node (for all node types other than root), placing it as the last child of the first innermost element.
# "<p>123<b>Test</b></p>" $dom->parse('<b>Test</b>')->at('b')->wrap('<p>123</p>')->root; # "<div><p><b>Test</b></p>123</div>" $dom->parse('<b>Test</b>')->at('b')->wrap('<div><p></p>123</div>')->root; # "<p><b>Test</b></p><p>123</p>" $dom->parse('<b>Test</b>')->at('b')->wrap('<p></p><p>123</p>')->root; # "<p><b>Test</b></p>" $dom->parse('<p>Test</p>')->at('p')->child_nodes->first->wrap('<b>')->root;
$dom = $dom->wrap_content('<div></div>');
Wrap HTML/XML fragment around this node's content (for root and tag nodes), placing it as the last children of the first innermost element.
# "<p><b>123Test</b></p>" $dom->parse('<p>Test<p>')->at('p')->wrap_content('<b>123</b>')->root; # "<p><b>Test</b></p><p>123</p>" $dom->parse('<b>Test</b>')->wrap_content('<p></p><p>123</p>');
my $bool = $dom->xml; $dom = $dom->xml($bool);
Disable HTML semantics in parser and activate case-sensitivity, defaults to auto detection based on XML declarations.
Some Mojo::DOM58 methods return an array-based collection object based on Mojo::Collection, which can either be accessed directly as an array reference, or with the following methods.
# Chain methods $collection->map(sub { ucfirst })->shuffle->each(sub { my ($word, $num) = @_; say "$num: $word"; }); # Access array directly to manipulate collection $collection->[23] += 100; say for @$collection;
my $new = $collection->compact;
Create a new collection with all elements that are defined and not an empty string.
# $collection contains (0, 1, undef, 2, '', 3) $collection->compact->join(', '); # "0, 1, 2, 3"
my @elements = $collection->each; $collection = $collection->each(sub {...});
Evaluate callback for each element in collection or return all elements as a list if none has been provided. The element will be the first argument passed to the callback and is also available as $_.
$_
# Make a numbered list $collection->each(sub { my ($e, $num) = @_; say "$num: $e"; });
my $first = $collection->first; my $first = $collection->first(qr/foo/); my $first = $collection->first(sub {...}); my $first = $collection->first($method); my $first = $collection->first($method, @args);
Evaluate regular expression/callback for, or call method on, each element in collection and return the first one that matched the regular expression, or for which the callback/method returned true. The element will be the first argument passed to the callback and is also available as $_.
# Longer version my $first = $collection->first(sub { $_->$method(@args) }); # Find first value that contains the word "mojo" my $interesting = $collection->first(qr/mojo/i); # Find first value that is greater than 5 my $greater = $collection->first(sub { $_ > 5 });
my $new = $collection->flatten;
Flatten nested collections/arrays recursively and create a new collection with all elements.
# $collection contains (1, [2, [3, 4], 5, [6]], 7) $collection->flatten->join(', '); # "1, 2, 3, 4, 5, 6, 7"
my $new = $collection->grep(qr/foo/); my $new = $collection->grep(sub {...}); my $new = $collection->grep($method); my $new = $collection->grep($method, @args);
Evaluate regular expression/callback for, or call method on, each element in collection and create a new collection with all elements that matched the regular expression, or for which the callback/method returned true. The element will be the first argument passed to the callback and is also available as $_.
# Longer version my $new = $collection->grep(sub { $_->$method(@args) }); # Find all values that contain the word "mojo" my $interesting = $collection->grep(qr/mojo/i); # Find all values that are greater than 5 my $greater = $collection->grep(sub { $_ > 5 });
my $stream = $collection->join; my $stream = $collection->join("\n");
Turn collection into string.
# Join all values with commas $collection->join(', ');
my $last = $collection->last;
Return the last element in collection.
my $new = $collection->map(sub {...}); my $new = $collection->map($method); my $new = $collection->map($method, @args);
Evaluate callback for, or call method on, each element in collection and create a new collection from the results. The element will be the first argument passed to the callback and is also available as $_.
# Longer version my $new = $collection->map(sub { $_->$method(@args) }); # Append the word "mojo" to all values my $domified = $collection->map(sub { $_ . 'mojo' });
my $result = $collection->reduce(sub {...}); my $result = $collection->reduce(sub {...}, $initial);
Reduce elements in collection with callback, the first element will be used as initial value if none has been provided.
# Calculate the sum of all values my $sum = $collection->reduce(sub { $a + $b }); # Count how often each value occurs in collection my $hash = $collection->reduce(sub { $a->{$b}++; $a }, {});
my $new = $collection->reverse;
Create a new collection with all elements in reverse order.
my $new = $collection->slice(4 .. 7);
Create a new collection with all selected elements.
# $collection contains ('A', 'B', 'C', 'D', 'E') $collection->slice(1, 2, 4)->join(' '); # "B C E"
my $new = $collection->shuffle;
Create a new collection with all elements in random order.
my $size = $collection->size;
Number of elements in collection.
my $new = $collection->sort; my $new = $collection->sort(sub {...});
Sort elements based on return value of callback and create a new collection from the results.
# Sort values case-insensitive my $case_insensitive = $collection->sort(sub { uc($a) cmp uc($b) });
$collection = $collection->tap(sub {...});
my $array = $collection->to_array;
Turn collection into array reference.
my $new = $collection->uniq; my $new = $collection->uniq(sub {...}); my $new = $collection->uniq($method); my $new = $collection->uniq($method, @args);
Create a new collection without duplicate elements, using the string representation of either the elements or the return value of the callback/method.
# Longer version my $new = $collection->uniq(sub { $_->$method(@args) }); # $collection contains ('foo', 'bar', 'bar', 'baz') $collection->uniq->join(' '); # "foo bar baz" # $collection contains ([1, 2], [2, 1], [3, 2]) $collection->uniq(sub{ $_->[1] })->to_array; # "[[1, 2], [2, 1]]"
$collection = $collection->with_roles('Mojo::Collection::Role::One');
Report issues related to the format of this distribution or Perl 5.8 support to the public bugtracker. Any other issues should be reported directly to the upstream Mojolicious issue tracker.
Dan Book <dbook@cpan.org>
Code and tests adapted from Mojo::DOM, a lightweight DOM parser by the Mojolicious team.
Copyright (c) 2008-2016 Sebastian Riedel and others.
Copyright (c) 2016 "AUTHOR" and "CONTRIBUTORS" for adaptation to standalone format.
This is free software, licensed under:
The Artistic License 2.0 (GPL Compatible)
Mojo::DOM, HTML::TreeBuilder, XML::LibXML, XML::Twig, XML::Smart
To install Mojo::DOM58, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Mojo::DOM58
CPAN shell
perl -MCPAN -e shell install Mojo::DOM58
For more information on module installation, please visit the detailed CPAN module installation guide.