Extract array with same name from multidimensional array

Extract array with same name from multidimensional array

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Extract array with same name from multidimensional array
Tag : php , By : jrf
Date : November 29 2020, 12:01 PM

this will help I have this Array from a json that represent a form. I have to collect all the [components] in a new array , If I understood you correctly recursion can help:
function extractComponents($arrayWithComponents)
    $components = [];

    if (!isset($arrayWithComponents['components']) || !is_array($arrayWithComponents['components'])) {
        return $components;

    foreach ($arrayWithComponents['components'] as $component) {
        if (isset($component['columns'])) {
            foreach ($component['columns'] as $column) {
                $components = array_merge($components, extractComponents($column));
        } else {
            $components = array_merge($components, extractComponents($component));
            $components[] = $component;

    return $components;


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Which algorithm should I use to extract an array from a multidimensional array?

Tag : arrays , By : silvervino
Date : March 29 2020, 07:55 AM
this will help One relatively simple way is to approach this task as a recursive mapping of K-tuples of dimension N to K-tuples of dimension M < N. Since this is language-agnostic, the following facilities need to be available in your target language:
Given an instance of an N-dim array, find N Given an instance of an N-dim array and a k < N, find the number of items in dimension k Given an instance of an N-dim array A and a vector of N integers I, get or set the item at a position defined by indexes in the vector. For example, if the vector is I = {2, 3, 4}, there needs to be an operation for obtaining A[2, 3, 4] from the 3-D array A and a vector I. Given a vector D of size M defining dimensions, there needs to be an operation for constructing an array of M dimensions, each dimension taking the size of the corresponding item in the vector. For example, if the vector D = {3, 4}, there needs to be an operation that creates a 2-D array with dimensions 3 and 4.
void RecursiveCopy(Vector F, Vector D, Array S, Vector SI, int sp, Array T, Vector TI, int tp) {
    if (pos != TS.size) {
        if (F[sp] != -1) {
            // This is an "all" dimension
            for (int i = 0 ; i != D[sp] ; i++) {
                SI[sp] = i;
                TI[tp] = i;
                RecursiveCopy(F, D, S, SI, sp+1, T, TI, tp+1);
        } else {
            // This is a fixed dimension
            SI[sp] = F[sp];
            RecursiveCopy(F, D, S, SI, sp+1, T, TI, tp);
    } else {
        // Read from the source at indexes defined by vector SI
        var value = S.get(SI);
        // Write to the destination at indexes defined by vector TI
        T.setValue(TI, value); // Prerequisite 3
Array getSubarray(Array S, Vector<string> request) {
    Vector F = Vector[S.Size]; // The number of dimensions in A; prerequisite 1
    Vector D = Vector[S.Size]; // The number of dimensions in A
    Assert(request.Size == S.Size); // Request must have N items
    int k = 0;
    Vector resDim;
    for (int i = 0 ; i != req.Size ; i++) {
        if (req[i] == "all") {
            F[i] = -1;
            D[i] = A.dimensionOf(i); // Prerequisite 2
        } else {
            F[i] = ParseInteger(req[i]);
            D[i] = -1;
    Array T = Array(resDim); // Prerequisite #4
    Vector SI = Vector[S.Size];
    Vector TI = Vector[k];
    RecursiveCopy(F, D, S, SI, 0, T, TI, 0);
    return T;

Extract Multidimensional Array And Manipulate to Other Array

Tag : php , By : Paul
Date : March 29 2020, 07:55 AM
To fix this issue This is the standard task for an array_map. Assuming you have an initial array in $array variable:
$result = array_reduce(array_map(function($elem) {
  $a = array();
  foreach($elem['hari'] as $k => $v) {
    $a[] = array(
      'id_jadwal'      => 1,
      'hari'           => $v,
      'jam'            => $elem['jam'][$k],
      'mata_pelajaran' => $elem['mata_pelajaran'][$k]
  return $a;
}, $array), function($memo, $item) {
  return $memo = array_merge($memo, $item);
}, array());

How to extract multidimensional associative array to simple numeric array

Tag : php , By : kbrust
Date : March 29 2020, 07:55 AM
Any of those help If you are using PHP > 5.5.0, you can use array_column:
$ids = array_column($array, 'ID');

    function array_column($array,$column_name)

        return array_map(function($element) use($column_name){return $element[$column_name];}, $array);



How to extract first element of each child array in multidimensional array?

Tag : javascript , By : Alex
Date : March 29 2020, 07:55 AM
hop of those help? I have a multidimensional array: , You can use nested map() and then flat()
var arr = [ [['Name 1', 2, 'Nigeria'], ['Name 3', 52, 'Egypt'], ['Name 5', 75, 'South Africa']], [['Name 5', 8, 'Nigeria'], ['Name 1', 62, 'Egypt'], ['Name 3', 115, 'South Africa']], [['Name 6', 88, 'Nigeria'], ['Name 3', 92, 'Egypt'], ['Name 5', 825, 'South Africa']] ];
   const res = arr.map(x => x.map(a => a[0])).flat(2)
var arr = [ [['Name 1', 2, 'Nigeria'], ['Name 3', 52, 'Egypt'], ['Name 5', 75, 'South Africa']], [['Name 5', 8, 'Nigeria'], ['Name 1', 62, 'Egypt'], ['Name 3', 115, 'South Africa']], [['Name 6', 88, 'Nigeria'], ['Name 3', 92, 'Egypt'], ['Name 5', 825, 'South Africa']] ];
 const res = [].concat(...arr.map(x => x.map(x => x[0])))

How to extract values from a multidimensional array to form another array?

Tag : javascript , By : baumichel
Date : March 29 2020, 07:55 AM
I wish did fix the issue. You could use reduce to group the items like this. Create an accumulator object with each type of food as key. Destructure each inner array to get the first and second item.
var MyArray = [
  ["coke", "beverages", "checked", 000],
  ["baguette", "bread", "checked", 001],
  ["water", "beverages", "checked", 000],
  ["pepsi", "beverages", "checked", 000],
  ["wholemeal", "bread", "checked", 001],

const grouped = MyArray.reduce((r, [item, type]) => {
  r[type] = r[type] || [];
  return r;
}, {})

const { bread, beverages } = grouped

console.log(bread, beverages)
  "beverages": [ "coke", "water", "pepsi" ],
  "bread": [ "baguette", "wholemeal" ]
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