Nice work with the guide, the bevy of examples makes it easy to digest.
The colon being used in multiple contexts is tricky. As I was scanning the examples I found postfix `:` doing type conversion like in `(%)\. {%/Apple/}{`3:}` and then I was wondering what it does when it has nothing on its left-hand side, like in `[(+)|0 [:1"x]`. Then I noticed that the [ were unbalanced in the latter example, and eventually figured out that `[:` is its own operator separate from `:` and the middle `[` had nothing to do with function syntax.
The colon being used in multiple contexts is tricky. As I was scanning the examples I found postfix `:` doing type conversion like in `(%)\. {%/Apple/}{`3:}` and then I was wondering what it does when it has nothing on its left-hand side, like in `[(+)|0 [:1"x]`. Then I noticed that the [ were unbalanced in the latter example, and eventually figured out that `[:` is its own operator separate from `:` and the middle `[` had nothing to do with function syntax.