Merge results of query - laravel

Question

I have a query that outputs its values as json in the following format:
[
{
"name":"Bob",
"date":"2016-02-05 00:00:00",
"value":34
},
{
"name":"John",
"date":"2016-02-05 00:00:00",
"value":5
},
{
"name":"Bob",
"date":"2016-02-05 00:00:00",
"value":3
},
{
"name":"Sarah",
"date":"2016-02-05 00:00:00",
"value":56
}
...
]
I need to put this data into the form:
[
{
"name":"Bob",
"data": [
[2016-02-05 00:00:00, 34],
[2016-02-05 00:00:00, 3]
]
},
{
"name":"John",
"data": [
[2016-02-05 00:00:00, 5]
]
},
{
"name":"Sarah",
"data": [
[2016-02-05 00:00:00, 56]
]
}
...
]
Or in other words, I need to combine the results that share a name and put the data into an array data, where each array holds the date and value.
The original json data is held in a variable $results:
foreach ($results as $result)
{
//
}
How do I achieve this?

Answer 1

Something like
function process_results($results) {
$out = [];
foreach ($results as $result) {
$name = $result['name'];
if ( ! $out[$name]) {
$out[$result['name']] = array( 'name' => $name, 'data' => array());
}
array_push($out[$name]['data'], array($result['date'], $result['value']));
}
return array_values($out);
}
This also seems to work
function process_results($results) {
return array_values(array_reduce($results, function($acc, $result) {
$name = $result['name'];
if ( ! $acc[$name]) {
$acc[$result['name']] = array( 'name' => $name, 'data' => array());
}
$acc[$name]['data'][] = array($result['date'], $result['value']);
return $acc;
}, []));
}