Online PHP editor | rfc for EQtXT

@ 2015-03-27T12:03:19Z

<?php

/**
 * @param array $numbers
 *
 * @return array
 */
function find_even(array $numbers) {
    if (count($numbers) === 0) {
        return [];
    }

    if (count($numbers) === 1) {
        return has_even($numbers) ? $numbers : [];
    }

    list($left, $right) = array_chunk($numbers, ceil(count($numbers) / 2));

    $left  = has_even($left) ? $left : [];
    $right = has_even($right) ? $right : [];

    $leftResult  = (count($left) > 1) ? find_even($left) : $left;
    $rightResult = (count($right) > 1) ? find_even($right) : $right;

    return array_merge($leftResult, $rightResult);
}

/**
 * @param array $numbers
 *
 * @return bool
 */
function has_even(array $numbers) {
    echo join(' ', $numbers) . PHP_EOL;

    foreach ($numbers as $number) {
        if ($number % 2 === 0) {
            return true;
        }
    }
    return false;
}

$numbers = [1, 2, 3, 7, 5, 7, 1, 3, 4, 9, 7, 3, 5, 7, 9];
echo join(' ', $numbers) . PHP_EOL . PHP_EOL;

echo PHP_EOL . join(' ', find_even($numbers)) . PHP_EOL;

Output for git.master, git.master_jit, rfc.property-hooks: 1 2 3 7 5 7 1 3 4 9 7 3 5 7 9 1 2 3 7 5 7 1 3 4 9 7 3 5 7 9 1 2 3 7 5 7 1 3 1 2 3 7 1 2 4 9 7 3 5 7 9 4 9 7 3 4 9 2 4

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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