dpolac / dictionary
Collection indexed with objects and scalars
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Requires
- php: ^5.4 || ^7.0
- ext-spl: *
This package is auto-updated.
Last update: 2024-10-29 04:59:10 UTC
README
Collection indexed with objects and scalars
Example
<?php $dict = new \DPolac\Dictionary(); $dict[new \stdClass()] = 12; $dict['php'] = 23; $dict[100] = 'dictionary';
Installation
Install via Composer:
composer require dpolac/dictionary
Usage
Class \DPolac\Dictionary
implements Iterator
, ArrayAccess
,
Countable
and Serializable
. It also provides methods for
creating and sorting Dictionary and for converting it to array.
Valid types of keys for Dictionary are:
- object
- integer
- float
- string
- bool
- null
You cannot use:
- Closure
- array
Creating
To create empty Dictionary, use constructor.
<?php $dict = new \DPolac\Dictionary();
You can also create Dictionary from key-value pairs.
<?php $dict = \DPolac\Dictionary::fromPairs([ ['key1', 'value1'], ['key2', 'value2'], ['key3', 'value3'], ]);
Last option is to create Dictionary from array.
<?php $dict = \DPolac\Dictionary::fromArray([ 'key1' => 'value1', 'key2' => 'value2', 'key3' => 'value3', ]);
Converting to PHP array
There are three methods that let you retrieve data as array:
Dictionary::keys()
- returns array of keys,Dictionary::values()
- returns array of values,Dictionary::toPairs()
- returns array of key-value pairs; each pair is 2-element array.
Copying Dictionary
Unlike an array, Dictionary is an object and that means it
is reference type. If you want the copy of Dictionary, you have
to use clone
keyword or call Dictionary::getCopy()
method.
Sorting elements
Just like an array, Dictionary is ordered. To sort Dictionary, use
Dictionary::sortBy($callback, $direction)
method. Any argument
can be omitted.
$callback
will be called for every element. Dictionary will be ordered by values returned by callback. First argument of the callback is value and second is key of element. Instead of callable, you can use"values"
or"keys"
string.$direction
can be"asc"
or"desc"
. Default value is"asc"
.
Examples of sorting:
<?php $dictionary->sortBy('values','asc');
<?php $dictionary->sortBy(function($value, $key) { return $value->title . $key->name; }, 'desc');
sortBy
changes Dictionary it is called for. If you want sorted copy,
chain it with getCopy
.
<?php $sortedDictionary = $dictionary->getCopy()->sortBy('values', 'asc');