I've got the following array as $main_array .Wanted to sum up all the elements in the sub array such as [0]=>6, [1]=>11, [2]=>15.
Array
(
[0] => Array
(
[0] => 1
[1] => 2
[2] => 3
)
[1] => Array
(
[0] => 2
[1] => 4
[2] => 5
)
[2] => Array
(
[0] => 8
[1] => 4
[2] => 3
)
)
Tried the following code.
foreach ($main_array as $key => $value)
$main_array[$key] = Array('1'=>array_sum($value));
print_r($main_array);
But the array structure I got was,
Array
(
[0] => Array
(
[1] => 6
)
[1] => Array
(
[1] => 11
)
[2] => Array
(
[1] => 15
)
)
I'm expecting the array structure as follows.
Array
(
[0] => 6
[1] => 11
[2] => 15
)
Thanks in advance!
When you're calling Array function you're explicitly making an array so you have to remove this from Array('1'=>array_sum($value));
This is how your code should look like
foreach ($main_array as $key => $value)
$main_array[$key] = array_sum($value);
Try this:
foreach ($main_array as $key => $value)
$main_array[$key] = array_sum($value);
That is, place the sum directly in the top level array.
Call array_sum() on every row in your input array. array_map() makes this operation expressive, concise, and doesn't require any new variables to be declared.
Code: (Demo)
$array = [
[1, 2, 3],
[2, 4, 5],
[8, 4, 3],
];
var_export(array_map('array_sum', $array));
Output:
array (
0 => 6,
1 => 11,
2 => 15,
)
Related
I have an array.in which i want to combine value according to same index value of sub array.it's a multi dimensional dynamic array which contain some same and some different indexes like sports footer etc.Please check the below array
Array
(
[0] => Array
(
[0] => Array
(
[Sport] => 15
)
[1] => Array
(
[Sport] => 14
)
[2] => Array
(
[Sport] => 29
)
)
[1] => Array
(
[0] => Array
(
[Surgical] => 11
)
[1] => Array
(
[Surgical] => 12
)
[2] => Array
(
[Surgical] => 13
)
[3] => Array
(
[Footwear] => 10
)
)
)
Below it the array format which i want as an output
Array
(
[0] => Array
(
[0] => 15
[1] => 14
[2] => 29
)
[1] => Array
(
[0] => 11
[1] => 12
[2] => 13
),
[2] => Array(
[0] => 10
)
)
Assuming your input array is called $data, you could do this:
foreach ($data as $row) {
foreach ($row as $pair) {
foreach ($pair as $key => $value) {
$result[$key][] = $value;
}
}
}
This will provide the $result as follows:
[
"Sport" => [15, 14, 29],
"Surgical" => [11, 12, 13],
"Footwear" => [10]
]
If you really want to throw away the "labels" and just keep the values, then add the following conversion at the end:
$result = array_values($result);
Which will give you the desired result:
[
[15, 14, 29],
[11, 12, 13],
[10]
]
... but that would seem less useful to me.
I have 2 Multidimensional arrays as follow:
Array1:
Array (
[0] => Array (
[0] => 2D Design
[1] => 3D Design & Modeling)
[1] => Array ( [0] => Android Developer
[1] => Artificial Intelligence
[2] => Web Developer)
)
Array2:
Array (
[0] => Array (
[0] => 5
[1] => 10)
[1] => Array ( [0] => 2
[1] => 4
[2] => 6)
)
I want to combine the above 2 arrays as key and value as below.
Array (
[0] => Array (
[2D Design] => 5
[3D Design & Modeling] => 10 )
[1] => Array (
[Android Developer] => 2
[Artificial Intelligence] => 4
[Web Developer] => 6 )
)
Please help me to do this. Answers will be appreciated.
use array_combine() function creates an array by using the elements from one "keys" array and one "values" array.
Note: Both arrays must have equal number of elements!
First parameter array taken as key of new array and second parameter taken as value new array .
$new_array=array();
for($i=0;$i<count($arr1);$i++)
{
$new_array[$i]=array_combine($arr1[$i],$arr2[$i]);
}
print_r($new_array);
Output :
Array
(
[0] => Array
(
[2D Design] => 5
[3D Design & Modeling] => 10
)
[1] => Array
(
[Android Developer] => 2
[Artificial Intelligence] => 4
[Web Developer] => 6
)
)
This will work,
$arr1 = array(
0 => array(
0 => "2D Design",
1 => "3D Design & Modeling"),
1 => array(0 => "Android Developer",
1 => "Artificial Intelligence",
2 => "Web Developer",
),
);
$arr2 = array(
0 => array(
0 => 5,
1 => 10,
),
1 => array(0 => 2,
1 => 4,
2 => 6,
),
);
$temp = [];
foreach ($arr1 as $k => &$v) {
foreach ($v as $k1 => &$v1) {
$temp[$k][$v1] = $arr2[$k][$k1];
}
}
print_r($temp);
I have fetched values of first array arr1 as key to temp variable and map it with values of arr2as value to temp array.
This code will work even if index i.e. 0,1,2,3 can be anything.
Here is working code.
Simply make mapped calls of array_combine(). So long as the same positioned rows have the same number of elements in them, everything will work perfectly.
Code: (Demo)
$keys =[
['2D Design', '3D Design & Modeling'],
['Android Developer', 'Artificial Intelligence', 'Web Developer']
];
$values = [
[5, 10],
[2, 4, 6]
];
var_export(
array_map('array_combine', $keys, $values)
);
I have a multidimensional array called $test:
Array (
[First item] => Array (
[screen] => 2
[1] => 2
[2] => 2
[3] => 2
[4] => 2
)
[Second Item] => Array (
[screen] => 3
[1] => 3
[2] => 3
[3] => 3
[4] => 3
)
)
I am trying to get the keys: screen, 1, 2, 3, and 4.
They are the same for First item and Second item. Do you know how I can loop through this array to get those values? So, basically getting the keys for the first array in my multidimensional array. Thank you!
How about this:
$keys = array_keys($test['First item']);
Or if you want to do it manually:
$keys = array();
foreach($test['First item'] as $key => $value) {
$keys[] = $key;
}
That would be something like:
$keys = array_keys(reset($your_array));
reset() gets the first value of your array and array_keys() the keys of the resulting array.
You might want to split it in two lines using a temporary variable to avoid strict warnings.
It depends on what you are trying to archive:
$test = Array (
"First item" => Array (
"screen" => 2,
1 => 2,
2 => 2,
3 => 2,
4 => 2,
),
"Second Item" => Array (
"screen" => 3,
1 => 3,
2 => 3,
3 => 3,
4 => 3,
)
);
To get all the keys
$vals = [];
foreach($test as $k=>$v){
$vals = array_merge($vals, array_keys($v));
}
this will yield you:
Array
(
[0] => screen
[1] => 1
[2] => 2
[3] => 3
[4] => 4
[5] => screen
[6] => 1
[7] => 2
[8] => 3
[9] => 4
)
Separated in another multidimensional array:
foreach($arr as $k=>$v){
$vals[] = array_keys($v);
}
Only the unique keys:
foreach($test as $k=>$v){
$vals = array_unique(array_merge($vals, array_keys($v)));
}
I am trying to subtract parts of one nested array from another, but I'm having difficulty specifying the parts that I want to subtract as both values are numbers.
My arrays are, for example:
Array ( [0] => Array ( [id] => 43 [quantity] => 4 ) )
Array ( [0] => Array ( [id] => 43 [quantity] => 2 ) )
And after the subtraction I want the Result to be:
Array ( [0] => Array ( [id] => 43 [quantity] => 2 ) )
I'm using the following code to perform the subtraction, but I can't stop it from subtracting the id from itself:
foreach(array_keys($arrayA) as $id)
{
foreach(array_keys($arrayA[$id]) as $type)
{
$newArray[$id][$type] = $arrayA[$id][$type] - $arrayB[$id][$type];
}
}
print_r($newArray);
Could someone please tell me how I can just effect the [quantity] part of the array, without changing the [id]? With the code as it is I get:
Array ( [0] => Array ( [id] => 0 [quantity] => 2 ) )
Thanks in advance.
$ar1 = array(0 => array('id' => 43, 'quantity' => 4));
$ar2 = array(0 => array('id' => 43, 'quantity' => 2));
$new_array = array();
foreach($ar1 as $key => $value)
{
$new_array[$key] = array('id' => $value['id'], 'quantity' => ($value['quantity'] - $ar2[$key]['quantity']));
}
Array
(
[0] => Array
(
[id] => 43
[quantity] => 2
)
)
I have an array contain this data
Array
(
[id] => Array
(
[0] => 1
[1] => 10
[2] => 4
)
[age] => Array
(
[0] => 1
[1] => 1
[2] => 2
)
)
Now I want to remove duplicates from the ['age'] and leave the first one in tact.
So this would return
Array
(
[id] => Array
(
[0] => 1
[2] => 4
)
[age] => Array
(
[0] => 1
[2] => 2
)
)
Any ideas? Or is there a function already in place to do this?
Like Gordon said, you'd need a custom function to make the relationship but you can use http://php.net/manual/en/function.array-unique.php ?
Wouldn't it be better to have the keys of the age array the corresponding values of the id array?
<?php
$array = array(
'id' => array(0 => 1, 1 => 10, 3 => 4),
'age' => array(0 => 1, 1 => 1, 2 => 2)
);
array_walk($array, 'dupe_killer');
print_r($array);
function dupe_killer(&$value, $key)
{
$value = array_unique($value);
}
?>
You could try this
$array = array('id' => array(1,10,4), 'age'=>array(1,1,2));
$age_array = array();
foreach ($array['age'] as $key => $val) {
if (in_array($val, $age_array))
unset($array['id'][$key], $array['age'][$key]);
$age_array[] = $val;
}
print_r($array);
this returns Array ( [id] => Array ( [0] => 1 [2] => 4 ) [age] => Array ( [0] => 1 [2] => 2 ) )
Regards
Luke