Problems are not stop signs; they are guidelines.
問(wèn)題的出現(xiàn)不是讓你止步，而是給你指路。———— Robert Schuller
據(jù)說(shuō)是一個(gè)百度php的面試題，已給定一個(gè)數(shù)組： $arr = array(‘b’=>’a’, ‘c’=>’a’, ‘e’=>’b’, ‘d’=>’b’, ‘f’=>’c’, ‘g’=>’e’, ‘h’=>’f’); 寫(xiě)一個(gè)算法，完成到以下格式的轉(zhuǎn)換： array ( 'a' => array ( 'b' => ar...