I see a lot of people taking issue with the idioms presented, and rightfully so in many cases.

Add the ability for people to improve or debate the solutions. Ultimately we should have a large curated cookbook (with additional variant selections and associated recipe variants).

The most important human element of programming is knowing what to build (and what pieces to build to make the bigger thing). How often do I have to lookup ways to read a file in Ruby?... most times I need to read a file, I have to refer to the different approaches. I just don't do that often enough to remember everything. What I do know is, "this will be a lot of data, so I need to read it line by line or in chunks". That should be all you need to know, and then you pull up a recipe.