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Dan Book

NAME

Mojo::DOM58 - Minimalistic HTML/XML DOM parser with CSS selectors

SYNOPSIS

  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";

DESCRIPTION

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.

FORK INFO

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 7.36 of Mojolicious.

NODES AND ELEMENTS

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.

  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.

CASE-SENSITIVITY

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;

SELECTORS

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('*');
E

An element of type E.

  my $title = $dom->at('title');
E[foo]

An E element with a foo attribute.

  my $links = $dom->find('a[href]');
E[foo="bar"]

An E element whose foo attribute value is exactly equal to bar.

  my $case_sensitive = $dom->find('input[type="hidden"]');
  my $case_sensitive = $dom->find('input[type=hidden]');
E[foo="bar" i]

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.

E[foo~="bar"]

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]');
E[foo^="bar"]

An E element whose foo attribute value begins exactly with the string bar.

  my $begins_with = $dom->find('input[name^="f"]');
  my $begins_with = $dom->find('input[name^=f]');
E[foo$="bar"]

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]');
E[foo*="bar"]

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]');
E:root

An E element, root of the document.

  my $root = $dom->at(':root');
E:nth-child(n)

An E element, the n-th child of its parent.

  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)');
E:nth-last-child(n)

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)');
E:nth-of-type(n)

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)');
E:nth-last-of-type(n)

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)');
E:first-child

An E element, first child of its parent.

  my $first = $dom->find('div p:first-child');
E:last-child

An E element, last child of its parent.

  my $last = $dom->find('div p:last-child');
E:first-of-type

An E element, first sibling of its type.

  my $first = $dom->find('div p:first-of-type');
E:last-of-type

An E element, last sibling of its type.

  my $last = $dom->find('div p:last-of-type');
E:only-child

An E element, only child of its parent.

  my $lonely = $dom->find('div p:only-child');
E:only-of-type

An E element, only sibling of its type.

  my $lonely = $dom->find('div p:only-of-type');
E:empty

An E element that has no children (including text nodes).

  my $empty = $dom->find(':empty');
E:checked

A user interface element E which is checked (for instance a radio-button or checkbox).

  my $input = $dom->find(':checked');
E.warning

An E element whose class is "warning".

  my $warning = $dom->find('div.warning');
E#myid

An E element with ID equal to "myid".

  my $foo = $dom->at('div#foo');
E:not(s1, s2)

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!

  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.

E:matches(s1, s2)

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');

This selector is part of Selectors Level 4, which is still a work in progress.

E F

An F element descendant of an E element.

  my $headlines = $dom->find('div h1');
E > F

An F element child of an E element.

  my $headlines = $dom->find('html > body > div > h1');
E + F

An F element immediately preceded by an E element.

  my $second = $dom->find('h1 + h2');
E ~ F

An F element preceded by an E element.

  my $second = $dom->find('h1 ~ h2');
E, F, G

Elements of type E, F and G.

  my $headlines = $dom->find('h1, h2, h3');
E[foo=bar][bar=baz]

An E element whose attributes match all following attribute selectors.

  my $links = $dom->find('a[foo^=b][foo$=ar]');

OPERATORS

Mojo::DOM58 overloads the following operators.

array

  my @nodes = @$dom;

Alias for "child_nodes".

  # "<!-- Test -->"
  $dom->parse('<!-- Test --><b>123</b>')->[0];

bool

  my $bool = !!$dom;

Always true.

hash

  my %attrs = %$dom;

Alias for "attr".

  # "test"
  $dom->parse('<div id="test">Test</div>')->at('div')->{id};

stringify

  my $str = "$dom";

Alias for "to_string".

METHODS

Mojo::DOM58 implements the following methods.

new

  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.

all_text

  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;

ancestors

  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");

append

  $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;

append_content

  $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;

at

  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.

  # Find first element with "svg" namespace definition
  my $namespace = $dom->at('[xmlns\:svg]')->{'xmlns:svg'};

attr

  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");

child_nodes

  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;

children

  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;

content

  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;

descendant_nodes

  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;

find

  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;

following

  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");

following_nodes

  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;

matches

  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]');

namespace

  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;

next

  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;

next_node

  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;

parent

  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;

parse

  $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>');

preceding

  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");

preceding_nodes

  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;

prepend

  $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;

prepend_content

  $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;

previous

  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;

previous_node

  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;

remove

  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;

replace

  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;

root

  my $root = $dom->root;

Return Mojo::DOM58 object for root node.

strip

  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;

tag

  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");

tap

  $dom = $dom->tap(sub {...});

Equivalent to "tap" in Mojo::Base.

text

  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;

to_string

  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;

tree

  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.

type

  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;

val

  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.

  # "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;

wrap

  $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;

wrap_content

  $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>');

xml

  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.

COLLECTION METHODS

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;

compact

  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"

each

  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";
  });

first

  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 });

flatten

  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"

grep

  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 });

join

  my $stream = $collection->join;
  my $stream = $collection->join("\n");

Turn collection into string.

  # Join all values with commas
  $collection->join(', ');

last

  my $last = $collection->last;

Return the last element in collection.

map

  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' });

reduce

  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 }, {});

reverse

  my $new = $collection->reverse;

Create a new collection with all elements in reverse order.

slice

  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"

shuffle

  my $new = $collection->shuffle;

Create a new collection with all elements in random order.

size

  my $size = $collection->size;

Number of elements in collection.

sort

  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) });

tap

  $collection = $collection->tap(sub {...});

Equivalent to "tap" in Mojo::Base.

to_array

  my $array = $collection->to_array;

Turn collection into array reference.

uniq

  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]]"

BUGS

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.

AUTHOR

Dan Book <dbook@cpan.org>

Code and tests adapted from Mojo::DOM, a lightweight DOM parser by the Mojolicious team.

CONTRIBUTORS

Matt S Trout (mst)

COPYRIGHT AND LICENSE

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)

SEE ALSO

Mojo::DOM, HTML::TreeBuilder, XML::LibXML, XML::Twig, XML::Smart