note 82335 deleted from ref.array by levim
| From: | levim@php.net | Date: | Tue, 06 May 2014 21:57:42 +0000 |
| Subject: | note 82335 deleted from ref.array by levim | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-199430@lists.php.net to get a copy of this message | ||
Note Submitter: pragash_jey at yahoo dot com
----
Java Like Array Implementation!
<?php
/*
* Author : Pragash Jeyaratnam
* Vector Class
* PHP Version 5.2.5
* Contact : pragash_jey@yahoo.com.
*/
class Vector
{
/*
* The number of valid components in this Vector object.
*/
protected $elementCount;
/*
* The array buffer into which the components of the vector are stored.
*/
protected $elementData;
/**Default vector Constructor*/
function __construct()
{
$this->elementData = array();
$this->elementCount = count($this->elementData);
}
/**Append the parameter element to the vector*/
public function add($object)
{
if(!empty($object))
{
$this->elementData[] = $object;
$this->elementCount = count($this->elementData);
return true;
}
else
return false;
}
/*
* Returns true of Vector is empty false otherwise
*/
public function isEmpty()
{
return($this->elementCount==0);
}
/*
* Returns the current size of this Vector
*/
public function size()
{
return $this->elementCount;
}
/*
* Searches for the first occurence of the given argument
**/
public function indexOf($object)
{
if(($index =array_search($object,$this->elementData)) !==false)
return $index;
else
return -1;
}
/*
* This function will retain TRUE if $object is contained
* within the vector else FALSE
*/
public function contains($object)
{
return ($this->indexOf($object)>=0);
}
/*
* Returns Vector Object at index $index
* Error : Null is returned
*/
public function get($index)
{
if($this->checkBound($index))
{
return ($this->elementData[$index]);
}
return NULL;
}
/*
* Sets the object at $index to be $object
**/
public function set($index,$object)
{
if($this->checkBound($index))
{
$this->elementData[$index] =$object ;
return true;
}
return false;
}
/*
* Removes element at $index
**/
public function removeAt($index)
{
if ($this->checkBound($index))
{
for ($i = $index; $i != $this->elementCount - 1; $i++)
{
$this->elementData[$i] = $this->elementData[$i +1];
}
array_pop($this->elementData);
$this->elementCount = count($this->elementData);
return true;
}
else {
return false;
}
}
/**
* Removes all elements from the Vector. Note that this does not
* resize the internal data array.
*/
public function removeAll()
{
if($this->elementCount ==0)
return;
for($i=0;$i<$this->size();$i++)
{
$this->set($i,NULL);
}
}
/*
* This function checks whether index
* is within the array bound
**/
private function checkBound($index)
{
if($index > $this->elementCount-1 || $index < 0)
{
throw new Exception('Array Index Out Of Bound Exception');
return false;
}
return true;
}
/*
*Removes the first element from the Vector
*/
public function removeFirstElement()
{
if($this->elementCount==0)
{
throw new Exception('No Such Element');
}
$test =array_shift($this->elementData);
if(!empty($test))
$this->elementCount = count($this->elementData);
}
}
?>