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@ 2018-05-31T12:11:57Z

<?php

$estimate = array(
    array(
        'gear' => 'MMG',
        'total' => 315,
        'efforts' => 9,
        'afh' => 18
    ),
    array(
        'gear' => 'MMG',
        'total' => 400,
        'efforts' => 2,
        'afh' => 6,
    ),
    array(
        'gear' => 'BOO',
        'total' => 200,
        'efforts' => 20,
        'afh' => 16,
    ), array(
        'gear' => 'BOB',
        'total' => 250,
        'efforts' => 20,
        'afh' => 16,
    )
);

$result = array_reduce($estimate, function($carry, $item) {
    if (!isset($carry[$item["gear"]])) {
        $carry[$item["gear"]] = $item;
        return $carry;
    }

    $carry[$item["gear"]]["total"] += $item["total"];
    $carry[$item["gear"]]["efforts"] += $item["efforts"];
    $carry[$item["gear"]]["afh"] += $item["afh"];

    return $carry;
});

print_r($result);

Output for git.master_jit, git.master, rfc.property-hooks: Array ( [MMG] => Array ( [gear] => MMG [total] => 715 [efforts] => 11 [afh] => 24 ) [BOO] => Array ( [gear] => BOO [total] => 200 [efforts] => 20 [afh] => 16 ) [BOB] => Array ( [gear] => BOB [total] => 250 [efforts] => 20 [afh] => 16 ) )

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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