This seems pretty well-written and well organized, kudos to the creators. It wasn't clear who the target audience is - from the table of contents on the side,

This seems pretty well-written and well organized, kudos to the creators. It wasn't clear who the target audience is - from the table of contents on the side, I thought it might be for people to new to programming. But they seem to assume at least some basic programming knowledge - just things like what variables are, how functions and types work, etc.