Mojo::Collection(3)

NAME
Mojo::Collection - Collection

SYNOPSIS
  use Mojo::Collection;

  # Manipulate collection
  my $collection = Mojo::Collection->new(qw(just works));
  unshift @$collection, 'it';

  # Chain methods
  $collection->map(sub { ucfirst })->shuffle->each(sub {
    my ($word, $count) = @_;
    say "$count: $word";
  });

  # Stringify collection
  say $collection->join("\n");
  say "$collection";

  # Use the alternative constructor
  use Mojo::Collection 'c';
  c(qw(a b c))->join('/')->url_escape->say;

DESCRIPTION
Mojo::Collection is a container for collections.

FUNCTIONS
Mojo::Collection implements the following functions.

  c
  my $collection = c(1, 2, 3);

Construct a new array-based Mojo::Collection object.

METHODS
Mojo::Collection implements the following methods.

  new
  my $collection = Mojo::Collection->new(1, 2, 3);

Construct a new array-based Mojo::Collection object.

  compact
  my $new = $collection->compact;

Create a new collection with all elements that are defined and not an empty string.

  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 $_.

  $collection->each(sub {
    my ($e, $count) = @_;
    say "$count: $e";
  });

  first
  my $first = $collection->first;
  my $first = $collection->first(qr/foo/);
  my $first = $collection->first(sub {...});

Evaluate regular expression or callback for each element in collection and return the first one that matched the regular expression, or for which the callback returned true. The element will be the first argument passed to the callback and is also available as $_.

  my $five = $collection->first(sub { $_ == 5 });

  flatten
  my $new = $collection->flatten;

Flatten nested collections/arrays recursively and create a new collection with all elements.

  grep
  my $new = $collection->grep(qr/foo/);
  my $new = $collection->grep(sub {...});

Evaluate regular expression or callback for each element in collection and create a new collection with all elements that matched the regular expression, or for which the callback returned true. The element will be the first argument passed to the callback and is also available as $_.

  my $interesting = $collection->grep(qr/mojo/i);

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

Turn collection into Mojo::ByteStream.

  $collection->join("\n")->say;

  map
  my $new = $collection->map(sub {...});

Evaluate callback for 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 $_.

  my $doubled = $collection->map(sub { $_ * 2 });

  pluck
  my $new = $collection->pluck($method);
  my $new = $collection->pluck($method, @args);

Call method on each element in collection and create a new collection from the results.

  # Equal to but more convenient than
  my $new = $collection->map(sub { $_->$method(@args) });

  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.

  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.

  my $insensitive = $collection->sort(sub { uc(shift) cmp uc(shift) });

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

Alias for "tap" in Mojo::Base.

  uniq
  my $new = $collection->uniq;

Create a new collection without duplicate elements.

ELEMENT METHODS
In addition to the methods above, you can also call methods provided by all elements in the collection directly and create a new collection from the results, similar to "pluck".

  push @$collection, Mojo::DOM->new("<div><h1>$_</h1></div>") for 1 .. 9;
  say $collection->find('h1')->type('h2')->prepend_content('Test ')->root;

ELEMENTS
Direct array reference access to elements is also possible.

  say $collection->[23];
  say for @$collection;

SEE ALSO
Mojolicious, Mojolicious::Guides, <http://mojolicio.us>.