This examples applies for web mainly, but could apply for other stuff also.
Also, having one big post would cause the issue whereas two people could have the "right" answer, one for the JS and one for the CSS.
Though having one big post regroup everything at the same place and that can be great too, as you have a more global view of the whole thing.
What do you think?
This question is a bit related to this question but does not cover exactly the same issue.