简介：这是数据结构&算法(PHP描述) 三元组 Triplet的详细页面，介绍了和php,有关的知识、技巧、经验，和一些php源码等。
class='pingjiaF' frameborder='0' src='http://biancheng.dnbcw.info/pingjia.php?id=339825' scrolling='no'>1 <?php
2 /**
3 * 三元组 Triplet
4 *
5 */
6 class Triplet
7 {
8 private $_data = null;
9
10 // 初始化三元组
11 public function init($val1,$val2,$val3)
12 {
13 $this->_data[0] = $val1;
14 $this->_data[1] = $val2;
15 $this->_data[2] = $val3;
16 return true;
17 }
18
19 // 销毁三元组
20 public function destroy()
21 {
22 unset($this->_data);
23 return true;
24 }
25
26 // 返回第$key的值
27 public function get($key)
28 {
29 if($key < 1 || $key > 3) return false;
30 return $this->_data[$key - 1];
31 }
32
33 // 设置第$key元的值为$val
34 public function put($key,$val)
35 {
36 if($key < 1 || $key > 3) return false;
37 $this->_data[$key - 1] = $val;
38 return true;
39 }
40
41 // 是否按升序排序
42 public function isAscending()
43 {
44 return ($this->_data[0] <= $this->_data[1]) && ($this->_data[1] <= $this->_data[2]);
45 }
46
47 // 是否按降序排序
48 public function isDescending()
49 {
50 return ($this->_data[0] >= $this->_data[1]) && ($this->_data[1] >= $this->_data[2]);
51 }
52
53 // 获取最大值
54 public function max()
55 {
56 return ($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] : $this->_data[2];
57 }
58
59 // 获取最小值
60 public function min()
61 {
62 return ($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];
63 }
64 }
65
66 //
67 $objTriplet = new Triplet();
68 echo "init:";var_dump($objTriplet->init(1,2,3)); echo "<br/>";
69
70 echo "get 1:";var_dump($objTriplet->get(1)); echo "<br/>";
71 echo "get 4:";var_dump($objTriplet->get(4)); echo "<br/>"; // false
72 echo "put 3,4:";var_dump($objTriplet->put(3,4)); echo "<br/>";
73
74 echo "max:";var_dump($objTriplet->max()); echo "<br/>";
75 echo "min:";var_dump($objTriplet->min()); echo "<br/>";
76
77 echo "isAscending:";var_dump($objTriplet->isAscending()); echo "<br/>";
78 echo "isDescending:";var_dump($objTriplet->isDescending()); echo "<br/>";
79 ?>