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  1. <?php
  2.  
  3. // your code goes here
  4. $meanValueFunc = function (array $arr): float {
  5.     return \array_sum($arr) / \count($arr);
  6. };
  7.  
  8. // п.2
  9. function arrayCallbackGenerator(array $arr, callable $callback): \Generator {
  10.     foreach ($arr as $a) {
  11.         yield $callback($a);
  12.     }
  13. }
  14.  
  15. // п.3
  16. $arr = [
  17.     [1, 2, 3],
  18.     [10, 20, 30, 40, 50],
  19. ];
  20.  
  21. // п.4
  22. foreach (arrayCallbackGenerator($arr, $meanValueFunc) as $mean) {
  23.     echo "$mean<br>";
  24. }
Success #stdin #stdout 0.02s 23664KB
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2<br>30<br>
https://ideone.com/1CwqRH
language:
PHP (php 7.3.5)
created:
5 years ago
visibility:
public

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