Optimize reindexing ArrayObject [duplicate]

Question

I need an optimized or custom function to update the indexes of object extends ArrayObject

Example:

<?php

class MyCollection extends ArrayObject
{
    // my logic for collection
}

$collection = new MyCollection([
    'first',
    'second',
    'third',
]); // will output [0 => 'first', 1 => 'second', 2 => 'third']

$collection->offsetUnset(1); // will output [0 => 'first', 2 => 'third']

// some reindex function
$collection->updateIndexes(); // will output [0 => 'first', 1 => 'third']

use array_values which would reset the keys?

web-nomad
– web-nomad

2018-09-24 12:36:30 +00:00
Commented Sep 24, 2018 at 12:36 — web-nomad
– web-nomad, Commented Sep 24, 2018 at 12:36
@web-nomad array_values work with array, not with object

Kart Av1k
– Kart Av1k

2018-09-24 14:45:34 +00:00
Commented Sep 24, 2018 at 14:45 — Kart Av1k
– Kart Av1k, Commented Sep 24, 2018 at 14:45

iainn · Accepted Answer · 2018-09-24 12:41:29Z

1

Use exchangeArray to swap out the inner array with one that's been run through array_values. You can combine this into a method on your custom MyCollection class:

class MyCollection extends ArrayObject
{
  public function updateIndexes() {
    $this->exchangeArray(array_values($this->getArrayCopy()));
  }
}

See https://3v4l.org/S8I7Z

answered Sep 24, 2018 at 12:41

iainn

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