Class: Alt

This class is a little redundant, as a simple array would usually suffice, but the Object Oriented syntax is nicer, and our original inspiration for this class was a two element array of background colours for table rows. The equivalent using an array still required an if statement, which this eliminates.

New in 1.2:

• Added a reset() method.

1     <?php
2     
3      $c = new Alt ('odd', 'even');
4     
5      while (...) {
6          echo $c->next ();
7      }
8     
9      --
10    
11     The equivalent using a single variable:
12    
13     $c = 'odd';
14    
15     while (...) {
16         echo $c;
17         if ($c == 'odd') {
18             $c = 'even';
19         } else {
20             $c = 'odd';
21         }
22     }
23    
24     --
25    
26     The equivalent using an array:
27    
28     $c = array ('odd', 'even');
29     $i = 0;
30    
31     while (...) {
32         echo $c[$i];
33         if ($i >= count ($c)) {
34             $i = 0;
35         }
36     }
37    
38     Using arrays, the next(), current(), each(), end(), etc. functions are
39     not appropriate when the alternating values are not the focus of the
40     loop, but are still required to change.
41    
42     ?>

Tags:

$vals =

[line 99]

Tags:

constructor Alt [line 128]

method next [line 151]

method reset [line 166]