Your IP : 216.73.216.220
<?php
namespace PhpCollection;
/**
* Interface that must be implemented by objects that are used as keys, or in sets.
*
* For entities, you can use the "EntityLikeObject" trait.
*
* @author Johannes M. Schmitt <schmittjoh@gmail.com>
*/
interface ObjectBasics
{
/**
* Produces a hash for the given object.
*
* If two objects are equal (as per the equals() method), the hash() method must produce
* the same hash for them.
*
* The reverse can, but does not necessarily have to be true. That is, if two objects have the
* same hash, they do not necessarily have to be equal, but the equals() method must be called
* to be sure.
*
* When implementing this method try to use a simple and fast algorithm that produces reasonably
* different results for non-equal objects, and shift the heavy comparison logic to equals().
*
* @return string|integer
*/
public function hash();
/**
* Whether two objects are equal.
*
* This can compare by referential equality (===), or in case of value objects like (\DateTime) compare
* the individual properties of the objects; it's up to the implementation.
*
* @return boolean
*/
public function equals(ObjectBasics $other);
}