public function step($result, $input)
{
$ret = $this->xf->step($result, $input);
if (Transducers::isReduced($ret)) {
return Transducers::reduced($ret);
}
return $ret;
}
public static function reduce($coll, TransformerInterface $xf, $init)
{
$result = $init;
foreach ($coll as $key => $value) {
$result = $xf->step($result, new Pair([$key, $value]));
if (Transducers::isReduced($result)) {
$result = Transducers::deref($result);
break;
}
}
return $xf->result($result);
}
public static function reduceArray($coll, TransformerInterface $xf, $init)
{
$result = array_reduce($coll, function ($result, $input) use($xf) {
if (Transducers::isReduced($result)) {
return $result;
}
return $xf->step($result, $input);
}, $init);
if (Transducers::isReduced($result)) {
$result = Transducers::deref($result);
}
return $xf->result($result);
}
public static function reduce($coll, TransformerInterface $xf, $init)
{
$result = $init;
while (!feof($coll)) {
$item = fgets($coll, 8196);
$result = $xf->step($result, $item);
if (Transducers::isReduced($result)) {
$result = Transducers::deref($result);
break;
}
}
return $xf->result($result);
}
public static function reduce($coll, TransformerInterface $xf, $init)
{
$result = $init;
$length = strlen($coll);
for ($i = 0; $i < $length; $i += 1) {
$result = $xf->step($result, $coll[$i]);
if (Transducers::isReduced($result)) {
$result = Transducers::deref($result);
break;
}
}
return $xf->result($result);
}
public function step($result, $input)
{
$pval = $this->pval;
$val = call_user_func($this->f, $input);
$this->pval = $val;
$none = Transducers::none();
if ($pval === $none || $pval === $val) {
$this->a[] = $input;
return $result;
}
$ret = $this->xf->step($result, $this->a);
$this->a = [];
if (!Transducers::isReduced($ret)) {
$this->a[] = $input;
}
return $ret;
}
