Transform data with Laravel helpers - php

Question

I have an array with the following format:
[
{
"stat_month": "01-2019",
"in_sum": 45443,
"out_sum": 42838,
"balance": 2605
},
{...}
]
But I want to transform this array, hopefully in one operation, to this:
[
"labels" => ["01-2019", "02-2019", "03-2019"],
"in_sum" => [45443, 60947, 56734],
"out_sum" => [42838, 42151, 75486],
"balance" => [2605, 18796, -18752]
]
Any ideas how to solve this in one operation with collection helper functions?

Answer 1

Look at mapToGroups in Laravel Collections:
https://laravel.com/docs/5.8/collections#method-maptogroups
or this solution:
$obj1 = new \stdClass;
$obj1->stat_month = "01-2019";
$obj1->in_sum = 45443;
$obj1->out_sum = 42838;
$obj1->balance = 2605;
$obj2 = new \stdClass;
$obj2->stat_month = "02-2019";
$obj2->in_sum = 55443;
$obj2->out_sum = 52838;
$obj2->balance = 3605;
$collection = collect([
$obj1,$obj2
]);
$aResult = [
'labels' => [],
'in_sum' => [],
'out_sum' => [],
'balance' => []
];
$collection->each(function ($item, $key) use (&$aResult) {
$aResult['labels'][] = $item->stat_month;
$aResult['in_sum'][] = $item->in_sum;
$aResult['out_sum'][] = $item->out_sum;
$aResult['balance'][] = $item->balance;
});
Result:
array:4 [▼
"labels" => array:2 [▼
0 => "01-2019"
1 => "02-2019"
]
"in_sum" => array:2 [▼
0 => 45443
1 => 55443
]
"out_sum" => array:2 [▼
0 => 42838
1 => 52838
]
"balance" => array:2 [▼
0 => 2605
1 => 3605
]
]

Answer 2

You can do this is php like this:
<?php
$array = '[
{
"stat_month": "01-2019",
"in_sum": 45443,
"out_sum": 42838,
"balance": 2605
},
{
"stat_month": "01-2019",
"in_sum": 45443,
"out_sum": 42838,
"balance": 2605
},
{
"stat_month": "01-2019",
"in_sum": 45443,
"out_sum": 42838,
"balance": 2605
}
]';
$array = json_decode($array, true);
$arrayResult = [
'stat_month' => array_column($array, 'stat_month'),
'in_sum' => array_column($array, 'in_sum'),
'out_sum' => array_column($array, 'out_sum'),
'balance' => array_column($array, 'balance')
];
echo "<pre>";
print_r($arrayResult);
?>

Answer 3

You can use simplified array_map() and receive desired output:
$i = 0;
$tmp = ['labels'=>[],'in_sum'=>[],'out_sum'=>[],'balance'=>[]];
array_map(function($obj) use (&$tmp, $i){
foreach($tmp as &$val){
$val[] = array_values(((array)$obj))[$i];
$i++;
}
},$ar);
Demo
Or just simple foreach loop:
$tmp = ['labels'=>[],'in_sum'=>[],'out_sum'=>[],'balance'=>[]];
foreach($ar as $obj) {
$i = 0;
foreach($tmp as &$val){
$val[] = array_values(((array)$obj))[$i];
$i++;
}
}
Demo2
You can replace and re-write this code with Laravel map() function. Try to use dynamic loops instead of predefined object's properties.