harp-orm/identity-map

Allow only identical objects

Identity Map

, _(*1)

This package allows having "canonical objects"., _(*2)

Usage

Assuming "new Item(1)" will have id of "1":, _(*3)

$map = new IdentityMap(function ($item) {
    return $item->getId();
});

$item1 = new Item(1);
$item2 = new Item(1);
$item3 = new Item(2);

echo $map->get($item1); // Will return item1
echo $map->get($item2); // Will return item1
echo $map->get($item3); // Will return item3

That way you can make sure items with the same key are the same physical objects, _(*4)

The closure argument that use pass to the identity map, needs to return the "unique key" for each product., _(*5)

License

Copyright (c) 2014-2015, Clippings Ltd. Developed by Ivan Kerin as part of Clippings.com, _(*6)

Under BSD-3-Clause license, read LICENSE file., _(*7)