3.3.3 Can you answer these questions?

3.3.3.1 pre-code and post-code specifications in array package combining poorly with multirow package
3.3.3.2 Sort citations according to year, while being "grouped" by authors
3.3.3.3 tcolorbox overlays and space needed

Can you answer these?

3.3.3.1 pre-code and post-code specifications in array package combining poorly with multirow package

http://tex.stackexchange.com/questions/348782/pre-code-and-post-code-specifications-in-array-package-combining-poorly-with-mul

I have a long table where every single cell has to be formatted in math mode and enclosed between the same code, i.e. $\{\ldots,<cell>,\ldots\}$. 
To avoid repeating I'm using the feature from  ...
 
- asked by gigabytes 4votes
3.3.3.2 Sort citations according to year, while being "grouped" by authors

http://tex.stackexchange.com/questions/349201/sort-citations-according-to-year-while-being-grouped-by-authors

UPDATE (18 Jan 2017): The issue regarding different sorting between citation and bibliography seem to be due to a bug in biber v2.6 as stated here: Different ordering scheme for multiple citations and  ...
 
- asked by henhag88 2votes
3.3.3.3 tcolorbox overlays and space needed

http://tex.stackexchange.com/questions/348858/tcolorbox-overlays-and-space-needed

I'm moving from mdframed to using tcolorbox, and I'm almost where I want to be. 
Using mdframed, I can use the singleextra and firstextra parameters to add nodes to my frame, and this changes the  ...
 
- asked by Keith Davies 5votes