This question was closed today because it was a duplicate of this question. Today's question, however, had a really good answer — by one Jon Purdy — which I believe actually adds to the answers given to the earlier question. Since today's question has been closed, readers will be less likely to encounter this good answer that was posted today.
So my question is, what's to be done when there is a good answer to a question that is subsequently closed? Is there a way to migrate that answer over to the prior question? Sure, you'll say that someone posting an answer should check first to see if the question is a duplicate. Be that as it may, there's a good answer out that that I think deserves a wider audience than it's going to get. There are likely others, too.
I looked through the questions here to see if there was anything about this issue, and I couldn't find anything. But I am sorry if this question is a duplicate.