Rivers know this: there is no hurry. We shall get there some day.
河流知道這一點：無需匆忙。我們終有一日會到達。———— A. A. Milne
據(jù)說是一個百度php的面試題，已給定一個數(shù)組：$arr = array(‘b’=>’a’, ‘c’=>’a’, ‘e’=>’b’, ‘d’=>’b’, ‘f’=>’c’, ‘g’=>’e’, ‘h’=>’f’);寫一個算法，完成到以下格式的轉換：array ( 'a' => array ( 'b' => ar...