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;