1.三個(gè)數(shù)組[1,2,3],[4,5],[6,7]展開為145,147,156,157,246.....2.數(shù)組對象[{name:'a',children:[{name:'a-1'}]},{name:'b',children:[{name:'b-1'}]}] 展開為[{name:'a'},{name:'a-1'},{name:'b'},{name:'b-1'}]