using CList

[12Code]

Can anyone tell me what's the different between CList<CTime,CTime> m_listTime and CList<CTime,CTime&> m_listTime i used either one of these in my program, can't see the different.

;)*12Code

[Stuart Dootson]

12Code wrote:

CList m_listTime

This version will copy CTime items when you pass them as parameters to list methods like SetAt[^].

12Code wrote:

CList m_listTime

This version will pass a reference to CTime items when you pass them as parameters to list methods like SetAt[^]. I'm not surprised you don't see a difference - there's not much of one in this case. A slight performance issue, but not much else - except that you really want the default value for the second template parameter.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

[toxcct]

you see no difference because the differences are underground. the second parameter is meant to tell to CList how it's gonna handle your list elements like. a CTime template parameter tells to use so as methods parameter, that means each time you pass an element to a CList method (such as Add()), it will pass a CTime. that means the parameter will be passed by copy. a CTime& (or even better a const CTime&) template parameter will have you make no changes in your code, but it will handle references, so no copies anymore. the difference between the 2 is in the memory consumption and in the performances of the program.

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[CPallini]

As a side note, try to pass a temporary object to the second form and see what happens to your application... :rolleyes:

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