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Get data from multidimensional array js


By : Chung On Tsui
Date : September 16 2020, 07:00 AM
it helps some times I have a JS array, for example: , Use .map():
code :
const array1 = [{"entrance":"20","a":"10"},{"entrance":"15","b":"25"}];
const entrance = array1.map((e) => e.entrance);

console.log(entrance);


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Transfer data from large multidimensional array to smaller multidimensional array - is it worth?


By : kvfi
Date : March 29 2020, 07:55 AM
With these it helps The very first question you ask yourself should be:
Are you actually running into performance problems?

how to search a multidimensional array data according to another multidimensional array data result


By : ZackT
Date : March 29 2020, 07:55 AM
I wish this helpful for you I have 2 multidimensional arrays that takes data from 2 different tables in DB. One of them has 3 teams, the other one has the orders that teams have make. , This should do the work:
code :
$completeData = array();

foreach($orders as $order)
{
    if(!array_key_exists($order['grupi'], $completeData))
    {
        $completeData[$order['grupi']] = array();
    }
    $completeData[$order['grupi']][] = $order;
}   

Restructure multidimensional array of column data into multidimensional array of row data


By : Michelle Raphael
Date : March 29 2020, 07:55 AM
I hope this helps . As Kris Roofe stated in his deleted answer, array_column is indeed a more elegant way. Just be sure to put it into some kind of a foreach loop, similar to what Sahil Gulati showed you. For example, like this:
code :
$result = array();

foreach($where['id'] as $k => $v)
{
  $result[] = array_column($where, $k);
}
array(3) {
  [0]=>
  array(2) {
    [0]=>
    int(12)
    [1]=>
    string(10) "1999-06-12"
  }
  [1]=>
  array(2) {
    [0]=>
    int(13)
    [1]=>
    string(10) "2000-03-21"
  }
  [2]=>
  array(2) {
    [0]=>
    int(14)
    [1]=>
    string(10) "2006-09-31"
  }
}

How can manage multidimensional array in foreach() for tree view while multidimensional array form of multi level


By : Mr. C
Date : March 29 2020, 07:55 AM
wish of those help Indeed array_filter does not work recursively.
Here is a recursive function that does the job of taking out null values:
code :
function array_filter_recursive($arr, $cb = null) {
    if (empty($cb)) {
        $cb = function ($el) {
            return $el;
        };
    }
    $result = [];
    foreach($arr as $key => $val) {
        if (is_array($val)) $val = array_filter_recursive($val, $cb);
        if ($cb($val)) $result[$key] = $val;
    }
    return $result;
}
$result.= "{ 'name': '".$child_4."', 'title': '".$child_4."' ,";
function convert($arr) {
    $result = [];
    $byId = [];

    function recurse(&$result, &$byId, $arr) {
        if (!is_array($arr)) return;
        if (isset($arr["gcn_id"])) {
            $parent = $arr["referral_id"];
            $record = [
                "name" => $arr["fullname"],
                "title" => $arr["gcn_id"]
            ];
            $byId[$arr["gcn_id"]] = &$record; 
            if (isset($byId[$parent])) {
                $byId[$parent]["children"][] = &$record;
            } else {
                $result[] = &$record;
            }
        } else {
            foreach($arr as $child) {
                recurse($result, $byId, $child);
            }
        }
    }

    recurse($result, $byId, $arr);    
    return $result;
}

$result = json_encode(convert($legs), JSON_PRETTY_PRINT);

echo $result;
[
    {
        "name": "Wendy-Lynn Barr",
        "title": 11312,
        "children": [
            {
                "name": "Pauline Blake",
                "title": 11303
            }
        ]
    },
    {
        "name": "Ed Kilgour",
        "title": 5064,
        "children": [
            {
                "name": "Craig Corbitt",
                "title": 11302,
                "children": [
                    {
                        "name": "Kristi  Iles",
                        "title": 5175,
                        "children": [
                            {
                                "name": "Joshua  Iles",
                                "title": 6013
                            }
                        ]
                    },
                    {
                        "name": "Chris Chowning",
                        "title": 6308,
                        "children": [
                                // ...etc

Comparison in multidimensional array to find proper index to use in other multidimensional array fails


By : user2497544
Date : March 29 2020, 07:55 AM
I wish this help you "c" and "labels" are two different arrays with exact content. See this question to get to know how to compare arrays.
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