PHP実現反復器
2649 ワード
言うまでもなく、PHPの初心者にとって、勉強になりました.
<?php
/**
*
*/
interface NewIterator{
public function hasNext();
public function Next();
}
/**
* , NewIterator
*/
class BookIterator implements NewIterator {
private $array = array();//
private $num = 0;//
public function __construct($_string){
// 。
if (is_array($_string)){
$this->array = $_string;
}else{
$this->array = explode("|",$_string);
}
}
public function next(){
//
$arrayA = $this->array[$this->num];
// 1
$this->num = $this->num + 1;
return $arrayA;
}
public function hasNext(){
if($this->num >= count($this->array) || $this->array[$this->num] == null){
return false;
}else{
return true;
}
}
}
/**
*
*/
class BookA{
private $bookarray = array();
public function __construct(){
$this->addItem(" ");
$this->addItem("think in java");
$this->addItem("php ");
}
public function addItem($_string){
$this->bookarray[]=$_string;
}
// 。 。 。
public function getIterator(){
return new BookIterator($this->bookarray);
}
}
/**
*
*/
class BookB{
private $bookindex="";
public function __construct(){
$this->addItem(" ");
$this->addItem("PHP");
$this->addItem("think in java");
}
public function addItem($_string){
$this->bookindex.="|".$_string;
}
public function getIterator(){
return new BookIterator(trim($this->bookindex,"|"));//
}
}
/**
*
// */
//require "NewIterator.php";
//require 'BookA.php';
//require 'BookB.php';
//require "BookIterator.php";
class BookList{
private $bookarray;
private $bookstring;
public function __construct(BookA $_booka,BookB $_bookb){
$this->bookarray = $_booka;
$this->bookstring = $_bookb;
// ;
}
public function Menu(){
$bookaiterator = $this->bookarray->getIterator();
echo " A :"."</br>";
$this->toString($bookaiterator);
echo "</br>";
$bookbiterator = $this->bookstring->getIterator();
echo " B :"."</br>";
$this->toString($bookbiterator);
}
public function toString(NewIterator $_iterator){
while ($_iterator->hasNext()){
echo $_iterator->Next()."</br>";
}
}
}
$booka=new BookA();
$bookb=new BookB();
$a = new BookList($booka,$bookb);
$a->Menu();
?>