我有一個像這樣的 JSON：  [   {      "faculty":{         "_id":"5f9c3e04e5a5423cec34b2e2",         "code":"khmt",         "facultyName":"Computer Science"      },      "classSize":91,      "warnedLength":61   },   {      "faculty":{         "_id":"5f9c53c8a0db8f4240ec6f71",         "code":"dtvt",         "facultyName":"Electronics and Telecommunication"      },      "classSize":89,      "warnedLength":44   },   {      "faculty":{         "_id":"5f9c53c8a0db8f4240ec6f71",         "code":"dtvt",         "facultyName":"Electronics and Telecommunication"      },      "classSize":59,      "warnedLength":20   },   {      "faculty":{         "_id":"5f9c53c8a0db8f4240ec6f71",         "code":"hkvt",         "facultyName":"Space Airline"      },      "classSize":10,      "warnedLength":5   },   {      "faculty":{         "_id":"5f9c53c8a0db8f4240ec6f71",         "code":"hkvt",         "facultyName":"Space Airline"      },      "classSize":20,      "warnedLength":10   },   {      "faculty":{         "_id":"5f9c53c8a0db8f4240ec6f71",         "code":"hkvt",         "facultyName":"Space Airline"      },      "classSize":30,      "warnedLength":15   }]我想要這樣的輸出：[   {      "faculty":{         "_id":"5f9c3e04e5a5423cec34b2e2",         "code":"khmt",         "facultyName":"Computer Science"      },      "totalClassSize":91,      "totalWarnedLength":61   },   {      "faculty":{         "_id":"5f9c53c8a0db8f4240ec6f71",         "code":"dtvt",         "facultyName":"Electronics and Telecommunication"      },      "totalClassSize":148, // total classSize of all class has facultyName is "Electronics and Telecommunication"      "totalWarnedLength":64 // total warnedLength of all class has facultyName is "Electronics and Telecommunication"   },輸出是一個數組，其總和classSize具有相同的屬性屬性totalClassSize，并且總和warnedLength具有相同的屬性屬性totalWarnedLength輸入是一個數組，輸出也仍然是一個數組我是學習代碼的初學者，但我仍然被這個問題困擾了一段時間非常感謝你幫助我，祝你有美好的一天