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Data structure & algorithm (PHP description) Triplet Triplet

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2016-07-25 08:50:561028browse
Data structure & algorithm (PHP description) Triplet Triplet
  1. /**
  2. * Triplet
  3. */
  4. class Triplet
  5. {
  6. private $_data = null;
  7. // Initialize triplet
  8. public function init($val1, $val2, $val3)
  9. {
  10. $this -> _data[0] = $val1;
  11. $this -> _data[1] = $val2;
  12. $this -> _data[2] = $val3;
  13. return true;
  14. }
  15. // Destroy the triple
  16. public function destroy()
  17. {
  18. unset($this -> _data);
  19. return true;
  20. }
  21. // Return the value of $key
  22. public function get($key)
  23. {
  24. if ($key < 1 || $key > 3) return false;
  25. return$this -> _data[$key-1];
  26. }
  27. // Set the value of the $key element to $val
  28. public function put($key, $val)
  29. {
  30. if ($key < 1 || $key > 3) return false;
  31. $this -> _data[$key-1] = $val;
  32. return true;
  33. }
  34. // Whether to sort in ascending order
  35. public function isAscending()
  36. {
  37. return ($this -> _data[0] <= $this -> _data[1]) && ($this - > _data[1] <= $this -> _data[2]);
  38. }
  39. // Whether to sort in descending order
  40. public function isDescending()
  41. {
  42. return ($this -> _data[0] > ;= $this -> _data[1]) && ($this -> _data[1] >= $this -> _data[2]);
  43. }
  44. // Get the maximum value
  45. public function max( )
  46. {
  47. return ($this -> _data[0] >= $this -> _data[1])? ($this -> _data[0] >= $this -> _data[2 ])?$this -> _data[0] :$this -> _data[2] : ($this -> _data[1] >= $this -> _data[2])?$this - > _data[1] :$this -> _data[2];
  48. }
  49. // Get the minimum value
  50. public function min()
  51. {
  52. return ($this -> _data[0] <= $this -> _data[1])? ($this -> _data[0] <= $this -> _data[2])?$this -> _data[0] :$this -> _data[ 2] : ($this -> _data[1] <= $this -> _data[2])?$this -> _data[1] :$this -> _data[2];
  53. }
  54. }
  56. $objTriplet = new Triplet();
  57. echo"init:";
  58. var_dump($objTriplet -> init(1, 2, 3));
  59. echo"
    ";
  61. echo "get 1:";
  62. var_dump($objTriplet -> get(1));
  63. echo"
    ";
  64. echo"get 4:";
  65. var_dump($objTriplet -> get(4 ));
  66. echo"
    "; // false
  67. echo"put 3,4:";
  68. var_dump($objTriplet -> put(3, 4));
  69. echo"
    ";
  71. echo"max:";
  72. var_dump($objTriplet -> max());
  73. echo"
    ";
  74. echo"min:";
  75. var_dump($objTriplet -> ; min());
  76. echo"
    ";
  78. echo"isAscending:";
  79. var_dump($objTriplet -> isAscending());
  80. echo"
    ";
  81. echo"isDescending:";
  82. var_dump($objTriplet -> isDescending());
  83. echo"
    ";
  85. ?>
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