reduce()

Reduces an array by removing values based on conditions or using compress/clean.

Parameters

$array : array<int|string, mixed>

The input array.

$reduce : bool|array{clone?: bool, conditions?: callable|array|string|null, depth?: int|null, excludes?: array|null, recursive?: bool, removeKeys?: array|null, throwable?: bool}|callable = true

Reduction mode:

• true: compress with default options
• array: compress with custom options (CompressOption)
• callable: fn($value, $key): bool

Tags

example

Remove nulls (default compress)

$data = ['a' => 1, 'b' => null, 'c' => 2];
$result = reduce($data, true);
// ['a' => 1, 'c' => 2]

Custom compress options

use oihana\core\options\CompressOption;

$data = ['a' => '', 'b' => null, 'c' => 'ok'];
$result = reduce( $data ,
[
    CompressOption::CONDITIONS =>
    [
        fn($v) => $v === null,
        fn($v) => $v === ''
    ]
]);
// ['c' => 'ok']

Custom callable

$data = ['name' => 'Alice', 'age' => 0, 'city' => 'Paris'];
$result = reduce($data, fn($v, $k) => is_string($v) && $v !== '');
// ['name' => 'Alice', 'city' => 'Paris']

Empty array

$result = reduce([], true);
// []

author

Marc Alcaraz

since

1.0.8