using the code below
$matchs = DiraChatLog::where('status','=','Match')->whereBetween('date_access', [$request->from, $request->to])->get();
foreach ($matchs as $key => $match) {
$array[] = [
$match->status => $match->date_access,
];
}
dd($array);
i get the output
now i want to merge the 4 arrays to 1.. how can i do that? my ouuput should be array:1> date => value
i have tried array_merge() and array_push() and it didnt work
for example using recursive array iterator from spl
$array = array(array(1,2,3),array(5,6,7),array(8,9,10));
$mergedArray = new RecursiveIteratorIterator(new RecursiveArrayIterator($array));
foreach ($mergedArray as $a) {
echo $a; // [1,2,3,4,5,6,7,8,9,10]
}
and that should be enough.
here is how u can use array_merge().
$arr = array(
0 => array(1 ,2 ,3),
1 => array(4, 5, 6),
2 => array(7, 8, 9)
);
$allInOne = array();
foreach ($arr as $value) {
$allInOne = array_merge($allInOne, $value);
}
var_dump($allInOne); // the output [1,2,3,4,5,6,7,8,9]
This code will merge you all arrays in one this is just what you want i guess
Related
I just can't find the right question for this
pretty much merging array From this
$arr1 = ["temp1", "temp2", "temp3"];
$arr2 = [5, 7, 2];
to this
$combined = [["name" => "temp1", "number" => 5], ["name" => "temp2", "number" => 7], ["name" => "temp3", "number" => 2]];
any idea to do it in most efficient way other than foreach?
$arr1 = ["temp1", "temp2", "temp3"];
$arr2 = [5, 7, 2];
foreach($arr1 as $key => $value)
{
$r[$key]['name'] = $value;
$r[$key]['number'] = $arr2[$key];
}
print_r($r);
Built-in function array_map actually can work with multiple arrays:
$result = array_map(function($value1, $value2) {
return ["name" => $value1, "number" => $value2];
}, $arr1, $arr2);
Here are some benchmarks comparing with simple foreach
You can use a foreach loop,
$result = [];
foreach($arr1 as $key => $value){
$resutl[] = array("name"=>$value,"number"=>$arr2[$key]);
}
You can do the following code to get your result
$arr1 = ["temp1", "temp2", "temp3"];
$arr2 = [5, 7, 2];
$count = count($arr1);
$combined = array();
for($i=0;$i<$count;$i++){
$combined[$i]['name'] = $arr1[$i];
$combined[$i]['number'] = $arr2[$i];
}
I need help sorting a multi-dimensional array consisting of numeric strings and arrays of numeric strings.
Here is my code:
$array = array();
$multi= array(
10,
9,
array(5,4),
array(6,7),
array(3,2),
array(8,1)
);
foreach ($multi as $value) {
if (is_numeric($value)) {
array_push($array, $value);
}
if (is_array($value)) {
array_push($array, $value);
}
}
sort($array);
for ($i=0; $i <count($array) ; $i++) {
echo $array[$i];
}
This is a MUCH cleaner way with no conditionals and no nested foreach loops. array_walk_recursive() only interates the "leaf-nodes" so you don't need to check if something is an array and run an inner foreach loop.
Code: (Demo)
$multi=[10,9,[5,4],[6,7],[3,2],[8,1]];
array_walk_recursive($multi,function($v)use(&$flat){$flat[]=$v;});
sort($flat);
var_export($flat);
Output:
array (
0 => 1,
1 => 2,
2 => 3,
3 => 4,
4 => 5,
5 => 6,
6 => 7,
7 => 8,
8 => 9,
9 => 10,
)
Judging by your earlier closed question, you will want to use this complete method:
Code: (Demo)
$multi=[10,9,[5,4],[6,7],[3,2],[8,1]]; // declare multi-dim array
array_walk_recursive($multi,function($v)use(&$flat){$flat[]=$v;}); // store values
sort($flat); // sort
echo '<center>',implode('</center><br><center>',$flat),'</center>'; // display
// this will generate a trailing <br> tag that you may not wish to have:
/*
foreach($flat as $v){
echo "<center>$v</center><br>";
}
*/
Unrendered HTML Output:
<center>1</center><br>
<center>2</center><br>
<center>3</center><br>
<center>4</center><br>
<center>5</center><br>
<center>6</center><br>
<center>7</center><br>
<center>8</center><br>
<center>9</center><br>
<center>10</center>
I hope you want like this:-
foreach ($multi as $value) {
if (is_numeric($value)) {
$array[] = $value;
}if (is_array($value)) {
foreach($value as $val){
$array[] = $val;
}
}
}
sort($array);
print_r($array);
Output:-https://eval.in/848749
Let's say I have an array like this:
$array = [
['a' => 'v', 'b' => 's', 'c' => 's'],
['c' => 's', 'd' => 's', 'b' => 's'],
['b' => 's', 'e' => 's', 'g' => 's'],
];
I want to create a new array which contains how many unique keys are found anywhere in my array's associative rows.
Desired result:
[
'a' => 1,
'b' => 3,
'c' => 2,
'd' => 1,
'e' => 1,
'g' => 1
]
I tried with array_count_values(), but it is not right for my array structure.
Some correction and addition to your answer.
$newArray = Array();
foreach ($array as $values) {
foreach ($values as $key => $value) {
if (!isset($newArray[$key]))
$newArray[$key] = 0; // create new 0 element
$newArray[$key]++;
}
}
Other functional approach
$result = array_count_values( // 3. count values
call_user_func_array('array_merge', // 2. merge array of keys
array_map('array_keys', $array))); // 1. convert inner array to array with keys
var_dump($result);
Second one, just replace loops with array_map
$result = array();
array_map(function($inner_array)use(&$result)
{
array_map(function($key)use(&$result)
{
$value = &$result[$key]; // reference trick
$value++;
}, array_keys($inner_array));
}, $array);
var_dump($result);
Third one, with array_reduce
$result = array_count_values(
array_reduce($array, function($result, $inner_array)
{
return array_merge($result, array_keys($inner_array)); // merge arrays one by one
}, []));
var_dump($result);
Here are some alternative and modernized techniques not mentioned by #sectus.
Codes: (Demo)
Functional-style with spread-flattening:
var_export(
array_count_values(
array_merge(
...array_map(
'array_keys',
$array
)
)
)
);
Classic nested loops with null coalescing operator:
$counts = [];
foreach ($array as $row) {
foreach ($row as $k => $v) {
$counts[$k] = ($counts[$k] ?? 0) + 1;
}
}
var_export($counts);
Recursive iteration to access only leaf-nodes:
$counts = [];
array_walk_recursive($array, function($v, $k) use(&$counts) {
$counts[$k] = ($counts[$k] ?? 0) + 1;
});
var_export($counts);
I do that, it is working, but i want to know if exists another method:
$newArray = Array();
foreach ($array as $values) {
foreach ($values as $key => $value) {
$newArray[$key]++;
}
}
Array1
(
[a]=>1; [b]=>2; [c]=>3
)
Array2
(
[a]=>1;[b] =>1
)
Required result:
Array1
(
[a]=>2; [b]=>3; [c]=>3
)
How do i append Array1 with the values of Array2 based on their key? Thanks.
You can try something like this:
foreach($array2 as $key2 => $val2){
if(key_exists($key2, $array1)) {
$array1[$key2] += $val2;
} else {
$array1[$key2] = $val2;
}
}
Part of the issue would be that array 1 may not have all of the same keys as array 2. So, an array of all keys from both original arrays is needed, then loop through those keys, check if it exists in either original array, and finally add it to the final combined array.
<?php
$array1 = array('a' => 1, 'b' => 2, 'c' => 3);
$array2 = array('a' => 1, 'b' => 2, 'd' => 3);
$finalarr = array();
$arrkeys = array_merge(array_keys($array1), array_keys($array2));
$arrkeys = array_unique($arrkeys);
foreach($arrkeys as $key) {
$finalarr[$key] = 0;
if (isset($array1[$key])) {
$finalarr[$key] += $array1[$key];
}
if (isset($array2[$key])) {
$finalarr[$key] += $array2[$key];
}
}
print_r($finalarr);
?>
foreach($array1 as $key=>$value){
if(isset($array2[$key])){
$array1[$key] = $array1[$key] + $array2[$key];
}
}
Not the most elegant way, which would use array_walk or array_map, but I like to see and know exactly what's going on. This will give you what you are looking for.
First sum the values of the common keys and after that, add the others key in the other array:
foreach ($array2 as $k2 => $a2){
if (isset($array1[$k2])){
$array1[$k2]+=$a2;
unset($array2[$k2]);
}
}
$array1 += $array2;
Something like:
$result = array();
function ParseArray(array $array, array &$result)
{
foreach ($array as $k => $v) {
if (!array_key_exists($k, $result) {
$result[$k] = $v;
} else {
$result[$k] += $v;
}
}
}
ParseArray($Array1, $result);
ParseArray($Array2, $result);
print_r($result);
You should read about PHP array functions.
$array1 = array(
'a' => 1,
'b' => 2,
'c' => 3,
);
$array2 = array(
'a' => 1,
'b' => 1,
);
array_walk(
$array1,
function (&$value, $key) use ($array2) {
$value += (isset($array2[$key])) ? $array2[$key] : 0;
}
);
var_dump($array1);
How would you flip 90 degrees (transpose) a multidimensional array in PHP? For example:
// Start with this array
$foo = array(
'a' => array(
1 => 'a1',
2 => 'a2',
3 => 'a3'
),
'b' => array(
1 => 'b1',
2 => 'b2',
3 => 'b3'
),
'c' => array(
1 => 'c1',
2 => 'c2',
3 => 'c3'
)
);
$bar = flipDiagonally($foo); // Mystery function
var_dump($bar[2]);
// Desired output:
array(3) {
["a"]=>
string(2) "a2"
["b"]=>
string(2) "b2"
["c"]=>
string(2) "c2"
}
How would you implement flipDiagonally()?
Edit: this is not homework. I just want to see if any SOers have a more creative solution than the most obvious route. But since a few people have complained about this problem being too easy, what about a more general solution that works with an nth dimension array?
i.e. How would you write a function so that:
$foo[j][k][...][x][y][z] = $bar[z][k][...][x][y][j]
?(ps. I don't think 12 nested for loops is the best solution in this case.)
function transpose($array) {
array_unshift($array, null);
return call_user_func_array('array_map', $array);
}
Or if you're using PHP 5.6 or later:
function transpose($array) {
return array_map(null, ...$array);
}
With 2 loops.
function flipDiagonally($arr) {
$out = array();
foreach ($arr as $key => $subarr) {
foreach ($subarr as $subkey => $subvalue) {
$out[$subkey][$key] = $subvalue;
}
}
return $out;
}
I think you're referring to the array transpose (columns become rows, rows become columns).
Here is a function that does it for you (source):
function array_transpose($array, $selectKey = false) {
if (!is_array($array)) return false;
$return = array();
foreach($array as $key => $value) {
if (!is_array($value)) return $array;
if ($selectKey) {
if (isset($value[$selectKey])) $return[] = $value[$selectKey];
} else {
foreach ($value as $key2 => $value2) {
$return[$key2][$key] = $value2;
}
}
}
return $return;
}
Transposing an N-dimensional array:
function transpose($array, &$out, $indices = array())
{
if (is_array($array))
{
foreach ($array as $key => $val)
{
//push onto the stack of indices
$temp = $indices;
$temp[] = $key;
transpose($val, $out, $temp);
}
}
else
{
//go through the stack in reverse - make the new array
$ref = &$out;
foreach (array_reverse($indices) as $idx)
$ref = &$ref[$idx];
$ref = $array;
}
}
$foo[1][2][3][3][3] = 'a';
$foo[4][5][6][5][5] = 'b';
$out = array();
transpose($foo, $out);
echo $out[3][3][3][2][1] . ' ' . $out[5][5][6][5][4];
Really hackish, and probably not the best solution, but hey it works.
Basically it traverses the array recursively, accumulating the current indicies in an array.
Once it gets to the referenced value, it takes the "stack" of indices and reverses it, putting it into the $out array. (Is there a way of avoiding use of the $temp array?)
Codler's answer fails for a single-row matrix (e.g. [[1,2]]) and also for the empty matrix ([]), which must be special-cased:
function transpose(array $matrix): array {
if (!$matrix) return [];
return array_map(count($matrix) == 1 ? fn ($x) => [$x] : null, ...$matrix);
}
(note: PHP 7.4+ syntax, easy enough to adapt for older versions)
I got confronted with the same problem. Here is what i came up with:
function array_transpose(array $arr)
{
$keys = array_keys($arr);
$sum = array_values(array_map('count', $arr));
$transposed = array();
for ($i = 0; $i < max($sum); $i ++)
{
$item = array();
foreach ($keys as $key)
{
$item[$key] = array_key_exists($i, $arr[$key]) ? $arr[$key][$i] : NULL;
}
$transposed[] = $item;
}
return $transposed;
}
I needed a transpose function with support for associative array:
$matrix = [
['one' => 1, 'two' => 2],
['one' => 11, 'two' => 22],
['one' => 111, 'two' => 222],
];
$result = \array_transpose($matrix);
$trans = [
'one' => [1, 11, 111],
'two' => [2, 22, 222],
];
And the way back:
$matrix = [
'one' => [1, 11, 111],
'two' => [2, 22, 222],
];
$result = \array_transpose($matrix);
$trans = [
['one' => 1, 'two' => 2],
['one' => 11, 'two' => 22],
['one' => 111, 'two' => 222],
];
The array_unshift trick did not work NOR the array_map...
So I've coded a array_map_join_array function to deal with record keys association:
/**
* Similar to array_map() but tries to join values on intern keys.
* #param callable $callback takes 2 args, the intern key and the list of associated values keyed by array (extern) keys.
* #param array $arrays the list of arrays to map keyed by extern keys NB like call_user_func_array()
* #return array
*/
function array_map_join_array(callable $callback, array $arrays)
{
$keys = [];
// try to list all intern keys
array_walk($arrays, function ($array) use (&$keys) {
$keys = array_merge($keys, array_keys($array));
});
$keys = array_unique($keys);
$res = [];
// for each intern key
foreach ($keys as $key) {
$items = [];
// walk through each array
array_walk($arrays, function ($array, $arrKey) use ($key, &$items) {
if (isset($array[$key])) {
// stack/transpose existing value for intern key with the array (extern) key
$items[$arrKey] = $array[$key];
} else {
// or stack a null value with the array (extern) key
$items[$arrKey] = null;
}
});
// call the callback with intern key and all the associated values keyed with array (extern) keys
$res[$key] = call_user_func($callback, $key, $items);
}
return $res;
}
and array_transpose became obvious:
function array_transpose(array $matrix)
{
return \array_map_join_array(function ($key, $items) {
return $items;
}, $matrix);
}
We can do this by using Two foreach. Traveling one array and another array to create new arrayLike This:
$foo = array(
'a' => array(
1 => 'a1',
2 => 'a2',
3 => 'a3'
),
'b' => array(
1 => 'b1',
2 => 'b2',
3 => 'b3'
),
'c' => array(
1 => 'c1',
2 => 'c2',
3 => 'c3'
)
);
$newFoo = [];
foreach($foo as $a => $k){
foreach($k as $i => $j){
$newFoo[$i][]= $j;
}
}
Check The Output
echo "<pre>";
print_r($newFoo);
echo "</pre>";
Before I start, I'd like to say thanks again to #quazardus for posting his generalised solution for tranposing any two dimenional associative (or non-associative) array!
As I am in the habit of writing my code as tersely as possible I went on to "minimizing" his code a little further. This will very likely not be to everybody's taste. But just in case anyone should be interested, here is my take on his solution:
function arrayMap($cb, array $arrays) // $cb: optional callback function
{ $keys = [];
array_walk($arrays, function ($array) use (&$keys)
{ $keys = array_merge($keys, array_keys($array)); });
$keys = array_unique($keys); $res = [];
foreach ($keys as $key) {
$items = array_map(function ($arr) use ($key)
{return isset($arr[$key]) ? $arr[$key] : null; },$arrays);
$res[$key] = call_user_func(
is_callable($cb) ? $cb
: function($k, $itms){return $itms;},
$key, $items);
}
return $res;
}
Now, analogous to the PHP standard function array_map(), when you call
arrayMap(null,$b);
you will get the desired transposed matrix.
This is another way to do the exact same thing which #codler s answer does. I had to dump some arrays in csv so I used the following function:
function transposeCsvData($data)
{
$ct=0;
foreach($data as $key => $val)
{
//echo count($val);
if($ct< count($val))
$ct=count($val);
}
//echo $ct;
$blank=array_fill(0,$ct,array_fill(0,count($data),null));
//print_r($blank);
$retData = array();
foreach ($data as $row => $columns)
{
foreach ($columns as $row2 => $column2)
{
$retData[$row2][$row] = $column2;
}
}
$final=array();
foreach($retData as $k=>$aval)
{
$final[]=array_replace($blank[$k], $aval);
}
return $final;
}
Test and output reference: https://tutes.in/how-to-transpose-an-array-in-php-with-irregular-subarray-size/
Here is array_walk way to achieve this,
function flipDiagonally($foo){
$temp = [];
array_walk($foo, function($item,$key) use(&$temp){
foreach($item as $k => $v){
$temp[$k][$key] = $v;
}
});
return $temp;
}
$bar = flipDiagonally($foo); // Mystery function
Demo.
Here's a variation of Codler/Andreas's solution that works with associative arrays. Somewhat longer but loop-less purely functional:
<?php
function transpose($array) {
$keys = array_keys($array);
return array_map(function($array) use ($keys) {
return array_combine($keys, $array);
}, array_map(null, ...array_values($array)));
}
Example:
<?php
$foo = array(
"fooA" => [ "a1", "a2", "a3"],
"fooB" => [ "b1", "b2", "b3"],
"fooC" => [ "c1", "c2", "c3"]
);
print_r( transpose( $foo ));
// Output like this:
Array (
[0] => Array (
[fooA] => a1
[fooB] => b1
[fooC] => c1
)
[1] => Array (
[fooA] => a2
[fooB] => b2
[fooC] => c2
)
[2] => Array (
[fooA] => a3
[fooB] => b3
[fooC] => c3
)
);