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C# ArrayList question.

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Started by thedevdan May 20, 2004 08:23 PM

3 comments, last by thedevdan 19 years, 11 months ago

thedevdan

210

Author

May 20, 2004 08:23 PM

Why does it''s Clone() method return an object, instead of an ArrayList? All it does is force me to cast to an ArrayList whenever I use Clone().

Not giving is not stealing.

SiCrane

11,840

May 20, 2004 08:34 PM

ArrayList.Clone() is an implementation of the ICloneable interface. And ICloneable.Clone() is defined to return an Object type.

edit: and C# doesn't support covariant return types.

[edited by - SiCrane on May 20, 2004 9:35:28 PM]

thedevdan

210

Author

May 20, 2004 08:41 PM

Thanks again, SiCrane.

Not giving is not stealing.

DrGUI

402

May 21, 2004 07:20 AM

What is a covariant return type? Object can hold refs and boxing value types.

------------------------------------Development of Rock, Paper, Scissors - The Third Dimension

Zahlman

1,682

May 21, 2004 11:40 AM

quote:Original post by DrGUI
What is a covariant return type?

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C# ArrayList question.

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