class IArray extends ArrayObject
{
static function make($array)
{
return new self($array);
}
function map($func)
{
$res = new self();
foreach ($this as $k => $v)
{
$res[$k] = $func($k, $v);
}
return $res;
}
function filter($func)
{
$res = new self();
foreach ($this as $k => $v)
{
if ($func($k, $v))
{
$res[$k] = $v;
}
}
return $res;
}
}
$nums = array(10,20,30,40);
$res = IArray::make($nums)->filter(function($k, $v) { return $v > 15; })->map(function($k, $v) { return $v * 2; });
print_r($res);
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