public function testSingle()
{
$arr = array(3, 4, 1, 7, 4);
$val = PHPArray::single($arr, function ($item) {
return $item >= 5;
});
$this->assertEquals(7, $val);
$val = PHPArray::single($arr, function ($item) {
return $item >= 10;
});
$this->assertNull($val);
}
