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為 PHP 陣列帶來一點 Ruby/Prototype 的味道

文章網址：Bring some Ruby/Prototype flavour in your PHP array

原文轉錄如下：

You know that in ruby/prototype you can traverse thru each element of array like this Array.each(function(){/*function body*/}). It has also some methods like without(), inspect(), indexOf();last(), first() and others…. so how about implementing these cool methods in your regular PHP array?? No problem, lets extend the ArrayObject and have some fun. Here is the class.

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class ExtendedArrayObject extends ArrayObject {
private $_array;
public function __construct()
{
if (is_array(func_get_arg(0)))
$this->_array = func_get_arg(0);
else
$this->_array = func_get_args();
parent::__construct($this->_array);
}
public function XArray()
{
parent::__construct($array);
}
public function each($callback)
{
$iterator = $this->getIterator();
while($iterator->valid()) {
$callback($iterator->current());
$iterator->next();
}
}
public function without()
{
$args = func_get_args();
return array_values(array_diff($this->_array,$args));
}
public function first()
{
return $this->_array[0];
}
public function indexOf($value)
{
return array_search($value,$this->_array);
}
public function inspect()
{
echo "<pre>".print_r($this->_array, true)."</pre>";
}
public function last()
{
return $this->_array[count($this->_array)-1];
}
public function reverse($applyToSelf=false)
{
if (!$applyToSelf)
return array_reverse($this->_array);
else
{
$_array = array_reverse($this->_array);
$this->_array = $_array;
parent::__construct($this->_array);
return $this->_array;
}
}
public function shift()
{
$_element = array_shift($this->_array);
parent::__construct($this->_array);
return $_element;
}
public function pop()
{
$_element = array_pop($this->_array);
parent::__construct($this->_array);
return $_element;
}
}

Now you can use it like this

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$newArray = new ExtendedArrayObject(array(1,2,3,4,5,6));

or you can even construct it like this

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$newArray = new ExtendedArrayObject(1,2,3,4,5,6);

then you can use these methods

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function speak($value)
{
echo $value;
}
$newArray->each(<span style="color: red;">"speak"</span>)<span style="color: red;">;</span>
$newArray->without(2,3,4);
$newArray->i<span style="color: red;">n</span>spect();
$newArray->indexOf(5);
$newArray->reverse();
$newArray->reverse(true); /*for changing array itself*/
$newArray->shift();
$newArray->pop();
$newArray->last();
$newArray->first();

So how is this ExtendedArrayObject, like it?

Regards

Hasin Hayder

真的很厲害，這得把 PHP5 摸得相當熟稔才有辦法想到。

唉…看來我的 PHP5 高手之路還很長…

註：原來的程式有錯，紅色部份的部份是我加上去的。另外原作把 E_NOTICE 關掉，所以會把沒有用引號包住的 speak 當成字串傳遞，因此如果在 E_ALL 的狀況下會出現問題。

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