> Could you please summarize what the quoted functions functions do?
Do you mind taking a bit of time to look at https://github.com/magnars/s.el
and click on the names it's unclear?
I mean, I could copy paste it all here but that'd take me 10 minutes, while I guess looking at that page takes about 1 minute.
Except if maybe you think it'd also help others? To be honest I'm surprised that you think those names are not self-evident about what they do. Maybe the fine details are not evident, but what it does in a rough sense should be able to be deduced from their name.