Get the sum of multidimensional array on Laravel Collection

Question

$arrays = collect([[0,1], [0,2], [0,3]]);

How to get the sum of array?

I tried the code below, but I got error.

 return array_map('array_sum', array_map(null, ...collect->toArray());

How to achieve this?

$arrays = [0,6];

How [0,5] is calculated?

ako
– ako

2018-11-05 11:26:06 +00:00
Commented Nov 5, 2018 at 11:26 — ako
– ako, Commented Nov 5, 2018 at 11:26
How it is calculated? Explain the algorithm of summation.

ako
– ako

2018-11-05 11:34:10 +00:00
Commented Nov 5, 2018 at 11:34 — ako
– ako, Commented Nov 5, 2018 at 11:34
1 + 2 + 3 = 6 . not 5

Emtiaz Zahid
– Emtiaz Zahid

2018-11-05 11:41:18 +00:00
Commented Nov 5, 2018 at 11:41 — Emtiaz Zahid
– Emtiaz Zahid, Commented Nov 5, 2018 at 11:41

simonecosci · Accepted Answer · 2018-11-05 11:38:48Z

5

sum each element keeping the key

    $arrays = collect([[0,1], [0,2], [0,3]]);
    $sum = array_fill(0, count($arrays->first()), 0);
    foreach ($arrays as $collection) {
        foreach ($collection as $key => $value) {
            $sum[$key] += $value;
        }
    }
    dd($sum);

this outputs

array:2 [▼
  0 => 0
  1 => 6
]

answered Nov 5, 2018 at 11:38

simonecosci

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Comments

ako · Accepted Answer · 2018-11-05 12:08:42Z

1

Get sum using Collections in Laravel:

    $item1_sum = 0;
    $x = collect([[5,1], [0,2], [4,3]])
            ->sum(function($item) use (&$item1_sum) {
                $item1_sum += $item[1];
                return $item[0];
            });
    dd([$x, $item1_sum]); // [9, 6]

edited Nov 5, 2018 at 12:08

answered Nov 5, 2018 at 11:28

ako

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1 Comment

simonecosci Over a year ago

[0, 6] because 1 + 2 + 3 = 6

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