/**
* Returns a hash code for this string. The hash code for a
* <code>String</code> object is computed as
* <blockquote><pre>
* s[0]*31^(n-1) + s[1]*31^(n-2) + ... + s[n-1]
* </pre></blockquote>
* using <code>int</code> arithmetic, where <code>s[i]</code> is the
* <i>i</i>th character of the string, <code>n</code> is the length of
* the string, and <code>^</code> indicates exponentiation.
* (The hash value of the empty string is zero.)
*
* @return int a hash code value for this object.
*/
public function hashCode()
{
$h = $this->hash;
if ($h == 0) {
$this->hash = $h = Integer::hexStringToInt(md5($this->string));
// $off = 0;
// $val = $this->string;
// $len = $this->count;
//
// for ($i = 0; $i < $len; $i++) {
// $h = 31 * $h + $val[$off++];
// }
// $this->hash = $h;
}
return $h;
}
