CODEWITHSUNDEEP
phparraysarray-map
user5175034
user5175034

Reputation:

Array Map With Empty Array

In merging two arrays similar to the simplified ones below, one of them is sometimes initially empty.

$newFields is always populated as an array from a database query when the page is opened and gets merged with the second value from $rowView but only when an entry on the page has been opened.

The problem is, with $newFields empty, the value from $rowView appears in its place and that is what I am trying to stop and make it have no value instead.

// If entry not opened, initialize array
$rowView = is_array($rowView) ? $rowView : [];

$newArray = array_map(function ($n) use ($rowView) {
    if (substr($n, 0, 1) === '$' && !empty($rowView)) :
        $k = substr($n, 1);
        return $rowView[$k];
    endif;
    return $n;
}, $newFields);

// Array $rowView is only when an entry has been opened
// otherwise it is empty
Array
(
    [ID] => 2
    [Marque] => MarqueName
)

// Array $newArray empty
Array
(
    [0] => Marque
    [1] => Marque
    [2] => 
    [3] => 1
    [4] => 0
    [5] => 50
    [6] => 1
    [7] => 
    [8] => 
    [9] => 0
    [10] => 
)

// Array $newArray populated
Array
(
    [0] => Marque
    [1] => Marque
    [2] => MarqueName
    [3] => 1
    [4] => 0
    [5] => 50
    [6] => 1
    [7] => 
    [8] => 
    [9] => 0
    [10] => 
)

Upvotes: -2

Views: 951

Answers (1)

CodeLoop
CodeLoop

Reputation: 37

You should be able to remove empty array items with array_filter()

or do this:

$newArray = array_filter(array_map(function ($n) use ($rowView) {
    if (substr($n, 0, 1) === '$' && !empty($rowView)) :
        $k = substr($n, 1);
        return $rowView[$k];
    endif;
    return $n;
}, $newFields));

Upvotes: 0

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