How to find the missing elements of an array?

Question

PHP

There is an array like:

array(3000) {
  [0]=>
  int(3000)
  [1]=>
  int(2999)
  [2]=>
  int(2998)
  [3]=>
  int(2997)
  .....
}

That is, the output is a list of numbers in order from largest to smallest, with a step of one
How to find out the missing numbers (there may be several in a row) and write them to a separate array?

Answer 1

$array = [...]; // ваш исходный массив

$array_full = range(min($array), max($array)); // эталонный массив

$array_diff = array_diff($array_full, $array); // пропущенные значения

Answer 2

$myArray = [];
for($i = 0; $i < 3000; $i++){
    if(!isset($array[$i])) {
        $myArray[] = $i;
    }
}

Answer 3

$missed = array_diff(range($arr[0], $arr[count($arr) - 1], -1), $arr);

Answer 4

foreach ($array as $key => $value) {
    $value = trim($value);
    if (empty($value))
        echo "$key empty <br/>";
    else
        echo "$key not empty <br/>";
}

Answer 5

Read about translate3d in CSS. Very easy to do.
Example: theory.phphtml.net/css/translate3d.html

Answer 6

On pure JS, without CSS3 - something like this
. Accordingly, you can change the function of the motion trajectory to the required one.