var arr1=new Array("a","b","c");?? ??? ?var arr2=new Array("d","e","f");var arr3=arr1.concat(arr2);和var arr1=new Array("a","b","c");?? ??? ?var arr2=new Array("d","e","f");var arr3=new Array();myarr3=arr3.concat(arr1,arr2);一般都是按第二種方法寫， 第一種寫法有什么問題嗎？求詳細解答
2種寫法問題在哪里？
兼容并包
2017-12-06 16:43:54
