[学习记录]VB数组应用：传值还是传址

[颜采川]

今天发现数组的内容总被改掉，仔细查了一下还是概念不清

直接使用等号了，结果数组B改了，A就跟着改了

Dim  arr1()  As   Object   =  { " string1 " ,  " string2 " ,  " string3 " }
Dim  arr2()  As   Object   =  arr1

按照上面代码，如果arr2改了，arr1就跟着被改了，被称为传址

要想给arr2与arr1一样的初始值，并且以后两个再也没有啥关系，需要传值

Dim  arr1()  As   Object   =  { " string1 " ,  " string2 " ,  " string3 " }
Dim  arr2()  As   Object
ReDim  arr2(arr1.Length - 1 )
Array.Copy(arr1, arr2, arr1.Length)