Laravel reduce

Collection laravel filter

$collection = collect([1, 2, 3, 4]);

$filtered = $collection->filter(function ($value, $key) {
    return $value > 2;
});

$filtered->all();

// [3, 4]

Source: laravel.com

Laravel reduce

$collection = collect([1, 2, 3]);

$total = $collection->reduce(function ($carry, $item) {
    return $carry + $item;
});

// 6

$total = $collection->reduce(function ($carry, $item) {
    return $carry + $item;
}, 4);

// 10   | where 4 is a initial value

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