post-workshop debrief changes

[stephlabou]

• move 10.2 "code may look intimidating" paragraph to top of section 10
• move practice questions throughout to matching sections (when appropriate)
• add language examples throughout, like in conditional sections
• more time needed overall and/or especially for exercises
• make sure all questions/exercises have answers
• make all tables pretty
• add section on subsetting, beyond index subsetting? (filter, select, etc. as a concept of subsetting) Or add a section within functions?
• add bit about missing values?
• clarify example answer to popcorn function

[stephlabou]

@kekoziar added sections for language examples at bottom of loops and functions to match conditionals. That should help scaffold up to real code practice.

These sections are a bit long, so what about having a separate section for a real world example after each? A new chapter rather than a new section - or is that breaking things up too much?

[stephlabou]

For missing values, probably sufficient as is to address NA in functions section. Otherwise we risk getting even deeper into the weeds and we don't have the time.

[stephlabou]

Adding language examples throughout, but looks like need additional packages to actually run Python, C, etc. code to get output examples.