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  1. <?php
  2.  
  3. function diagonalDifference($arr) {
  4.     $i = 0; 
  5.     $n = count($arr);
  6.     return abs(array_reduce($arr, 
  7.         function  ($c, $str) use (&$i, $n ) {
  8.         $i++;
  9.         return $c + $str[$i-1] - $str[$n-$i];
  10.    }, 0));
  11. }
  12.  
  13. print(diagonalDifference(
  14. [
  15. 	[11, 2, 4],
  16. 	[4, 5, 6],
  17. 	[10, 8, -12]
  18. ])); // should be 15
Success #stdin #stdout 0s 82560KB
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Standard input is empty
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15
https://ideone.com/l57vd7
language:
PHP (php 7.3.5)
created:
5 years ago
visibility:
public

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