raphhh / trex-collection
Helpers to manipulate collections
Requires
- php: >=5.4
Requires (Dev)
- phpunit/phpunit: @stable
This package is auto-updated.
Last update: 2024-11-25 22:39:12 UTC
README
Install
$ composer require raphhh/trex-collection
Usages
Collection
Collection
is just an ArrayObject
implementing some additional methods.
Because Collection
is just a facade, you can keep coding with ArrayObject
(or any object castable into an array) and implement some TRex traits by yourself:
use TRex\Collection; class MyCollection extends \ArrayObject { use CollectionValueAccessorTrait; use CollectionKeyAccessorTrait; use CollectionFilterTrait; use CollectionComparatorTrait; use CollectionSorterTrait; ... }
Filter
Provide methods to filter a collection.
Filter values with a callback: filter
use TRex\Collection\Collection; $collection = new Collection([ 't-rex', 'dog', 'cat', ]); $result = $collection->filter(function($value){ return $value === 't-rex'; }); (array)$result; //['t-rex']
Apply a callback to the values: each
use TRex\Collection\Collection; $collection = new Collection([ 't-rex', 'dog', 'cat', ]); $result = $collection->each(function($value){ return strtoupper($value); }); (array)$result; //['T-REX', 'DOG', 'CAT']
Extract a part of the list: extract
use TRex\Collection\Collection; $collection = new Collection([ 't-rex', 'dog', 'cat', ]); $result = $collection->extract(1); (array)$result; //[1 => 'dog', 2 => 'cat']
Comparator
Merge any collections: merge, mergeA
$coll1 = new Collection(['t-rex']); $coll2 = new Collection(['dog']); $coll3 = new Collection(['cat']); $result = $coll1->merge($coll2, $coll3); (array)$result; //['t-rex', 'dog', 'cat']
Find the difference between any collections: diff, diffA, diffK
$coll1 = new Collection(['t-rex', 'dog', 'cat']); $coll2 = new Collection(['dog']); $coll3 = new Collection(['cat']); $result = $coll1->diff($coll2, $coll3); (array)$result; //['t-rex']
Find the intersection between any collections: intersect, intersectA, intersectK
$coll1 = new Collection(['t-rex', 'dog', 'cat']); $coll2 = new Collection(['t-rex', 'dog']); $coll3 = new Collection(['t-rex', 'cat']); $result = $coll1->intersect($coll2, $coll3); (array)$result; //['t-rex']
Sorter
Reindex collection: reindex
$collection = new Collection(['a' => 't-rex', 'b' => 'dog', 'c' => 'cat']); $result = $collection->reindex(); //[0 => ''t-rex', 1 => 'dog', 2 => 'cat']
Sort collection: sort
$collection = new Collection(['t-rex', 'dog', 'cat']); $result = $collection->sort($callback); //indexes nex collection
Group by specific values: groupBy
class Bar { public $foo; public function __construct($foo) { $this->foo = $foo; } } $collection = new Collection([ new Bar('t-rex'), new Bar('dog'), new Bar('cat'), ]); //we will split the collection in 2: dinosaurs vs pets $results = $collection->groupBy(function(Bar $bar){ if($bar->foo === 't-rex'){ return 'dinosaur'; } return 'pet'; }); count($result['dinosaur']); // a Collection with 1 Bar with 't-rex' count($result['pet']); // a Collection with 2 Bar with 'dog' and 'cat'
Values
Retrieve first value: first
$collection = new Collection(['t-rex', 'dog', 'cat']); $collection->first(); //'t-rex'
Retrieve last value: last
$collection = new Collection(['t-rex', 'dog', 'cat']); $collection->last(); //'cat'
Check is has value: has
$collection = new Collection(['t-rex', 'dog', 'cat']); $collection->has('t-rex'); //true
Keys
Search keys: search
$collection = new Collection(['t-rex', 'dog', 'cat']); $collection->search('t-rex'); //[0]
Extract keys: keys
$collection = new Collection(['t-rex', 'dog', 'cat']); $collection->keys(); //[0, 1, 2]
Sorter
Sort a collection by a property or a method result.
You need to extends the class TRex\Collection\AbstractSorter
.
In the method invoke
, you have to return the value to sort for each object the collection content.
Note that the TRex sorter implements duck typing. You should create a sorter by key to access to the data, and not by type of collection content. For example, if you want to sort a collection of objects by them property '$foo', you should call your sorter 'FooSorter', anyway the objects the collection content.
use TRex\Collection\AbstractSorter; class Bar { public $foo; public function __construct($foo) { $this->foo = $foo; } } // we name the sorter with the name of the property $foo, and not the name of the class Bar class FooSorter extends AbstractSorter { /** * calls the property/method/key to extract the value to sort. * * @param mixed $object * @return mixed */ protected function invoke($object) { //here, we want to sort the collection by the property $foo return $object->foo; } } $collection = [ new Bar('a'), new Bar('c'), new Bar('b'), ]; uasort($collection, new FooSorter()); //will sort 'a', 'b', 'c'
Filter
You need to extends the class TRex\Collection\AbstractFilter
.
In the method invoke
, you have to return the value to compare for each object the collection content.
Note that the TRex filter implements duck typing. You should create a filter by key to access to the data, and not by type of collection content. For example, if you want to sort a collection of objects by them property '$foo', you should call your sorter 'FooSorter', anyway the objects the collection content.
use TRex\Collection\AbstractFilter; class Bar { public $foo; public function __construct($foo) { $this->foo = $foo; } } // we name the filter with the name of the property $foo, and not the name of the class Bar class FooFilter extends AbstractFilter { /** * @param mixed $object * @return mixed */ protected function invoke($object) { return $object->foo; } } $collection = [ new Bar('a'), new Bar('b'), new Bar('b'), ]; array_filter($collection, new FooFilter('b')); //wil keep only the 'b' ones