Brian Candler wrote:
> Li Chen wrote:
>> I expect that once an array is set up it should be fixed regardless how
>> many times it is called.
> 
> I'm not sure why you expect that.
> 
> In your program, you first assign @b1 to an empty array.
> 
> In method2, you loop around 4 times pushing '10' onto the end of the 
> array. Therefore @b1 becomes, each time around the loop,
> [10]
> [10,10]
> [10,10,10]
> [10,10,10,10]

How come this loop happan? I don't want a loop here.

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