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有這樣一個數組:jQuery。只輸出其他陣列上的唯一元素?
arr= [{"name":"Vasya","class_id":"1","class":{"id":"1","class":"1"}},
{"name":"John","class_id":"1","class":{"id":"1","class":"1"}},
{"name":"Smith","class_id":"2","class":{"id":"2","class":"2"}}];
能否請你告訴如何在類的唯一值的一個單獨的數組帶來了什麼?