I occasionally see questions which have been answered in the comments, but the poster has not responded to requests to post an answer, or only has a partial answer.
For example:
Is it okay to post their answer (with credit and CW) as was done here?
I occasionally see questions which have been answered in the comments, but the poster has not responded to requests to post an answer, or only has a partial answer.
For example:
Is it okay to post their answer (with credit and CW) as was done here?
I would try to notify the user first to give them the opportunity to answer the post and get the reputation. If they don't respond in a few days then answer it.
Perhaps somewhere inbetween the existing answers.
If the post is older and hasn't seen activity in a while (e.g. a day or two), then leave a comment to see if the user still wants to write their own answer before answering yourself.
If the post is new or has activity, then go ahead and answer :)
The user already had the opportunity to answer the question when he posted the comment, but decided for some reason not to do so. I don't get the point of 'locking' a question by posting a comment.
When the comment was too short or incomplete as an answer, it would motivate other users to write a better answer. This would help to improve the answer rate currently (1.4 of 2.5 required to leave beta). Therefore I would vote