Typed Collections

Description

Typed collections are an implementation of typed lists. Collections allow us to have traversable lists of a predetermined type and its subtypes. Its behavior prevents the looseness of arrays in PHP.

This library contains four collection classes: mutable and immutable lists, and mutable and immutable dictionaries. Mutable lists/dictionaries have its internal array altered whenever we perform operations on it. Immutable lists/dictionaries generate a new instance of itself when operations are done on it.

Installation

composer require edumarques/typed-collections:2.*

Basic usage

use EduardoMarques\TypedCollections\TypedCollection;
use EduardoMarques\TypedCollections\TypedCollectionImmutable;
use EduardoMarques\TypedCollections\Enum\ScalarType;
use EduardoMarques\TypedCollections\Enum\NonScalarType;

$typedCollection1 = TypedCollection::create(ScalarType::INTEGER);
$typedCollection2 = TypedCollection::create(ScalarType::STRING);

$typedCollectionImmutable1 = TypedCollectionImmutable::create(NonScalarType::CALLABLE);
$typedCollectionImmutable2 = TypedCollectionImmutable::create(\stdClass::class);

use EduardoMarques\TypedCollections\TypedDictionary;
use EduardoMarques\TypedCollections\TypedDictionaryImmutable;
use EduardoMarques\TypedCollections\Enum\ScalarType;
use EduardoMarques\TypedCollections\Enum\NonScalarType;

$typedDictionary1 = TypedDictionary::create(ScalarType::INTEGER, ScalarType::STRING);
$typedDictionary2 = TypedDictionary::create(ScalarType::STRING, ScalarType::DOUBLE);

$typedDictionaryImmutable1 = TypedDictionaryImmutable::create(ScalarType::INTEGER, NonScalarType::CALLABLE);
$typedDictionaryImmutable2 = TypedDictionaryImmutable::create(ScalarType::STRING, \stdClass::class);

Collection

A PHP implementation of an array list. Its type is specified at instantiation/construction. The class will perform runtime type checks to validate the appropriate values are being added. Many of the standard array functionalities are encapsulated in this class.

Dictionary

Dictionaries extend Collections' functionalities. The main difference is that they work with associative arrays, where you map keys to values.

Supported types:

• ScalarType::INTEGER
• ScalarType::STRING
• ScalarType::BOOLEAN
• ScalarType::DOUBLE
• NonScalarType::ARRAY
• NonScalarType::CALLABLE
• class-string

Support for abstract classes and interfaces

Collections and Dictionaries will check inheritance, so if you require a base class, derived classes can be added safely.

Contributing

Contributors are always welcome! For more information on how you can contribute, please read our contribution guideline.