Mojo::Collection - Collection
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;
Mojo::Collection is an array-based container for collections.
# Access array directly to manipulate collection my $collection = Mojo::Collection->new(1 .. 25); $collection->[23] += 100; say for @$collection;
Mojo::Collection implements the following functions, which can be imported individually.
my $collection = c(1, 2, 3);
Construct a new array-based Mojo::Collection object.
Mojo::Collection implements the following methods.
my $new = $collection->compact;
Create a new collection with all elements that are defined and not an empty string.
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, $count) = @_; say "$count: $e"; });
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 $_.
# 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.
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 $_.
# Find all values that contain the word "mojo" my $interesting = $collection->grep(qr/mojo/i);
my $stream = $collection->join; my $stream = $collection->join("\n");
Turn collection into Mojo::ByteStream.
# Join all values with commas $collection->join(', ')->say;
my $last = $collection->last;
Return the last element in collection.
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 $_.
# Append the word "mojo" to all values my $mojoified = $collection->map(sub { $_ . 'mojo' });
my $collection = Mojo::Collection->new(1, 2, 3);
my $new = $collection->pluck($key); my $new = $collection->pluck($method); my $new = $collection->pluck($method, @args);
Extract hash reference value from, or call method on, each element in collection and create a new collection from the results.
# Longer version my $new = $collection->map(sub { $_->{$key} }); my $new = $collection->map(sub { $_->$method(@args) });
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.
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 $insensitive = $collection->sort(sub { uc($a) cmp uc($b) });
$collection = $collection->tap(sub {...});
Alias for "tap" in Mojo::Base.
my $new = $collection->uniq;
Create a new collection without duplicate elements.
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".
# "<h2>Test1</h2><h2>Test2</h2>" my $collection = Mojo::Collection->new( Mojo::DOM->new("<h1>1</h1>"), Mojo::DOM->new("<h1>2</h1>")); $collection->at('h1')->type('h2')->prepend_content('Test')->join;
Mojo::Collection overloads the following operators.
my $bool = !!$collection;
Always true.
my $str = "$collection";
Stringify elements in collection and "join" them with newlines.
Mojolicious, Mojolicious::Guides, http://mojolicio.us.
To install Mojolicious, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Mojolicious
CPAN shell
perl -MCPAN -e shell install Mojolicious
For more information on module installation, please visit the detailed CPAN module installation guide.