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/**
* Allows you to easily keep track of rows of items as either odd or even.
* Each time you check (using the "which" method) the counter increments so that
* the next time you check the state will have changed.
*
* Jonathan Spalink
* Dec. 2009
*/
class OddEven
{
private $counter;
private $odd;
private $even;
const ODD = "odd";
const EVEN = "even";
/**
* Constructor method to create a new OddEven counter
*
* @param String $odd The value to return when the counter is Odd
* @param String $even The value to return when the counter is Even
*/
public function __construct($odd=self::ODD, $even=self::EVEN)
{
$this->counter = 1;
$this->odd = $odd;
$this->even = $even;
}
/**
* Increase the counter by 1 and return the old value
*
* @return Int The value of the counter before it is incremented
*/
public function increment()
{
return $this->counter++;
}
/**
* Resets the counter
*
* @param Int $initial The value at which to start the counter
*/
public function reset($initial=1)
{
$this->counter = $initial;
}
/**
* Runs an interation of the counter and returns whether its Odd or Even.
* This also increments the counter by 1.
*
* @return String Odd or Even?
*/
public function which()
{
$now = $this->increment();
return ($now % 2 ? $this->odd : $this->even);
}
/**
* Static invocation of the OddEven class to simply check a number without
* futher complications. If you don't pass in $odd or $even then the class
* defaults are used.
*
* @param int $number The number to check
* @param mixed $odd Value to return if number is odd
* @param mixed $even Value to return if number is even
* @return mixed $odd or $even
*/
static public function OddOrEven($number, $odd=self::ODD, $even=self::EVEN)
{
return ($number % 2 ? $odd : $even);
}
}
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2010-04-23 00:00:00