Online PHP editor | rfc for Toq75

@ 2017-08-28T14:07:41Z

<?php

$data = array(
    array(
        'id' => 1,
        'timestamp' => 1503050400,
        'name' => 'Event A',
        'value' => null,
    ),
    array(
        'id' => 2,
        'timestamp' => 1503446400,
        'name' => 'Event B',
        'value' => null,
    ),
    array(
        'id' => 2,
        'timestamp' => 1503446400,
        'name' => 'Event B',
        'value' => 71,
    ),
    array(
        'id' => 3,
        'timestamp' => 1503720000,
        'name' => 'Event C',
        'value' => 12,
    ),
    array(
        'id' => 3,
        'timestamp' => 1503720000,
        'name' => 'Event C',
        'value' => null,
    ),
);

$buckets = array();

foreach ($data as $item) {
    $bucketName = serialize(array(
        'id' => $item['id'],
        'timestamp' => $item['timestamp'],
        'name' => $item['name'],
    ));

    if (!array_key_exists($bucketName, $buckets)) {
        $buckets[$bucketName] = array();
    }

    $buckets[$bucketName][] = $item;
}

$filtered = array_reduce(
    $buckets,
    function (array $carry, array $items) {
        if (1 === count($items)) {
            $carry[] = array_shift($items);

            return $carry;
        }

        $withoutNullValue = array_filter($items, function (array $item) {
            return array_key_exists('value', $item) && null !== $item['value'];
        });

        if (0 < count($withoutNullValue)) {
            $carry = array_merge(
                $carry,
                $withoutNullValue
            );

            return $carry;
        }

        $carry[] = array_shift($items);

        return $carry;
    },
    array()
);

var_dump($filtered);

Output for git.master, git.master_jit, rfc.property-hooks: array(3) { [0]=> array(4) { ["id"]=> int(1) ["timestamp"]=> int(1503050400) ["name"]=> string(7) "Event A" ["value"]=> NULL } [1]=> array(4) { ["id"]=> int(2) ["timestamp"]=> int(1503446400) ["name"]=> string(7) "Event B" ["value"]=> int(71) } [2]=> array(4) { ["id"]=> int(3) ["timestamp"]=> int(1503720000) ["name"]=> string(7) "Event C" ["value"]=> int(12) } }

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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