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Informations about the package property-indexer
🖇 Porperty Indexer & Tree builder
-
A
PorpertyIndexerindexes objects/arrays properties inside a key-value map. - A
PorpertyTreebuilds a Tree structure from a collection of objects.
PorpertyIndexer and PropertyTree are iterables.
Index key and value values one case, nodes and leaves in the other are retreived from objects or arrays via symfony/property-access component.
Installation
Porperty Indexer
A PorpertyIndexer indexes objects/arrays properties inside a key-value map.
Choose :
- a string|int property to provide keys
- a mixed property or the objects|arrays themselves to provide values
Index objects properties
Say you have objects with properties id and value:
Create an indexer for id&value objects :
Add objects:
Retreive indexed values via their key:
Or directly via a reference to an indexed object:
Index array properties
Say you have array maps with id and value keys:
Create an indexer for id&value arrays (note the use of brakets for array property path):
Add arrays:
Retreive indexed values via their key:
Bulk Load collections
Use the load method:
Or invoke PropertyIndexer with a third argument:
Index Objects or Arrays (not their properties)
Don't specify the value path or set it to null when invoking PropertyIndexer:
Porperty Tree Builder
A PorpertyTree builds a Tree structure from a collection of objects.
Leaves path and values are picked from the items of the processed collection.
Porperty Tree basics
Say you have objects with properties id, value and date:
Porperty Tree mode ARRAY_LEAF
Mind the possible colisions between objects sharing the "same" properties path:
To avoid possible colisions, switch to array-type leaves:
Porperty Tree advanced features
Closure as valuePath
$valuePath 2nd arg accepts a one-arg Closure (that must return int|string). While iterating the object|array collection, PorpertyTree will bind the arg with the current object|array item to extract a value.
To retrieve the object items themselves, you may use an Identity Closure ( or better set valuePath to null :P ) :
Closure as groupByproperties
array $groupByproperties 3nd arg accepts one-arg Closures (that must return int|string). While iterating the object|array collection, PorpertyTree will bind the arg with the current object|array item to extract a tree-path node :
Those 2 examples are dumb-ones. Closures are for performing complex tasks (to retrieve path or leaves) that objects properties do not provide natively.
Tests
Run composer test.
Contributing
Feel free to submit pull requests.
Licence
MIT
Copyright (c) 2022 Olivier BERNARD
