/**
* This method returns a list of values matching the specified key.
*
* @access public
* @static
* @param IArrayList\Type $xss the array list to be processed
* @param Core\Type $k the key associated with value to be
* plucked
* @return IArrayList\Type a list of values matching the specified
* key
*/
public static function pluck(IArrayList\Type $xss, Core\Type $k) : IArrayList\Type
{
return IArrayList\Module::foldLeft($xss, function (IArrayList\Type $ys, IMap\Type $xs) use($k) : IArrayList\Type {
if ($xs->__hasKey($k)) {
return IArrayList\Module::append($ys, $xs->item($k));
}
return $ys;
}, IArrayList\Type::empty_());
}
/**
* This method tests the "append" method.
*
* @dataProvider data_append
*/
public function test_append(array $provided, array $expected)
{
$p0 = IArrayList\Type::make($provided[0], '\\Saber\\Data\\IInt32\\Type');
$p1 = IInt32\Type::box($provided[1]);
$r0 = IArrayList\Module::append($p0, $p1);
$e0 = $expected[0];
$this->assertInstanceOf('\\Saber\\Data\\IArrayList\\Type', $r0);
$this->assertSame($e0, $r0->unbox(1));
}
/**
* This method returns the list as an array.
*
* @access public
* @static
* @param ILinkedList\Type $xs the operand
* @return IArrayList\Type the list as an array list
*/
public static function toArrayList(ILinkedList\Type $xs) : IArrayList\Type
{
return ILinkedList\Module::foldLeft($xs, function (IArrayList\Type $c, Core\Type $x) {
return IArrayList\Module::append($c, $x);
}, IArrayList\Type::empty_());
}
