Why to have properties to sort or duplicate arrays ?

[Pierre Renié]

Hello,
To me, reading a field or a property should not modify the object.
The problem is that just an access to the properties 'reverse' or 'sort' are modifying my array. These 2 properties should be method instead.

I think that the property 'dup' should be a method too, because 'dup' is not a value of my Array object, it does something.