Online PHP editor | rfc for C8r1L

@ 2022-01-05T09:55:54Z

<?php

$arrays = [
    [
        "sender" => "userA",
        "value" => 10,
        "function" => "deposit"
    ],
    [
        "sender" => "userB",
        "value" => 5,
        "function" => "deposit"
    ],
    [
        "sender" => "userA",
        "value" => 2,
        "function" => "withdraw"
    ],
    [
        "sender" => "userA",
        "value" => 3,
        "function" => "deposit"
    ],
    [
        "sender" => "userA",
        "value" => 20,
        "function" => "deposit"
    ],
    [
        "sender" => "userC",
        "value" => 99,
        "function" => "withdraw"
    ]
];

$result = array_reduce($arrays, function ($acc, $curr) {
    if (array_key_exists($curr["sender"], $acc)) {
        if ($curr["function"] === "deposit") {
            $acc[$curr["sender"]] += $curr["value"];    
        }
        if ($curr["function"] === "withdraw") {
            $acc[$curr["sender"]] -= $curr["value"];
        }
    } else {
        if ($curr["function"] === "deposit") {
            $acc[$curr["sender"]] = $curr["value"];
        }
        if ($curr["function"] === "withdraw") {
            $acc[$curr["sender"]] = -1 * $curr["value"];
        }
    }
    return $acc;
}, []);

print_r($result);

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [userA] => 31 [userB] => 5 [userC] => -99 )

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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