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  1. <?php 
  2.  
  3. function map_impl($arr, $f, $idx)
  4. {
  5.     return array_map($f, array_intersect_key($arr, $idx));
  6. }
  7.  
  8. function map($arr, $f)
  9. {
  10.     return map_impl($arr, $f, range(0, count($arr) - 1));
  11. }
  12.  
  13. function MyFunctor($arg)
  14.     {
  15.         return floatval($arg * $arg) / 2.0;
  16.     };
  17.  
  18. function main()
  19. {
  20.     $arr = Array(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
  21.  
  22.     $arrMappedFunctor = map($arr, "MyFunctor");
  23.     $arrMappedLambda = map($arr, function($x) { return floatval($x * $x) / 2.0; });
  24.  
  25.     foreach ($arrMappedFunctor as $x) {
  26.         echo strval($x) . ' ';
  27.     }
  28.     echo PHP_EOL;
  29.     foreach ($arrMappedLambda as $x) {
  30.         echo strval($x) . ' ';
  31.     }
  32.     echo PHP_EOL;
  33.     return 0;
  34. }
  35.  
  36. main();
  37.  
Success #stdin #stdout 0.03s 23680KB
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0.5 2 4.5 8 12.5 18 24.5 32 40.5 50 
0.5 2 4.5 8 12.5 18 24.5 32 40.5 50
https://ideone.com/74xRnR
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
public

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