What is sender?

Posted by marty on Stack Overflow See other posts from Stack Overflow or by marty
Published on 2010-05-16T04:56:46Z Indexed on 2010/05/16 5:00 UTC
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I can't find this answer anywhere. What does it mean when there's a sender parameter in a method header? Does it represent the instance that called it, or the method that called it?

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