wrap($arrays->arrayOf($plugins->loadClass("java.lang.String"), "hello", "world", "kotlin")); // 从右到左连接所有单词，并添加索引信息 $joinedString = $words->foldRightIndexed("", function ($index, $word, $acc) { return $acc . $index . "_" . $word . " "; }); // 输出：连接后的字符串: 2_kotlin 1_world 0_hello $console->log("连接后的字符串: ", $joinedString);