The best kind of documentation let's you try your own code, right there

[CharlieJV]

Programming Reference: feature to try your own code next to code snippets

In case it is of any interest.

I'm in the process of rejigging the navigation for my programming reference.

Here's a rough first draft of notes describing this feature (i.e. running sample code and trying your own code while reading about some concept/feature/whatever):

Demonstration Programs and Runs