reference or pointer to some object?
steven.bethard at gmail.com
Wed Jan 12 19:43:28 EST 2005
Jeff Shannon wrote:
> Torsten Mohr wrote:
>> I still wonder why a concept like "references" was not
>> implemented in Python. I think it is (even if small)
>> an overhead to wrap an object in a list or a dictionary.
> Because Python uses a fundamentally different concept for variable names
> than C/C++/Java (and most other static languages). In those languages,
> variables can be passed by value or by reference; neither term really
> applies in Python. (Or, if you prefer, Python always passes by value,
> but those values *are* references.) Python doesn't have lvalues that
> contain rvalues; Python has names that are bound to objects. Passing a
> parameter just binds a new name (in the called function's namespace) to
> the same object.
Point of clarification: Java objects (but not Java primitive types like
ints or doubles) work almost identically to Python objects -- you can
basically think of them as references being passed by value. There's no
way to pass by reference in Java (even for Java primitive types).
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