_section
Display a List as a Header, followed by its contents --
Function
_section is intended for the common case where you want to display a section
on the page if and only if a specific List is non-empty. It looks like this:
My List -> _section(HEADER, DETAILS, EMPTY)
Each of the parameters can be any QL phrase, although they are often just text blocks. They are
treated as follows:
- HEADER is shown first, if the incoming List is non-empty. It gets the entire List as its Context.
- DETAILS is shown after the header, also getting the incoming List as its Context.
- EMPTY is shown if and only if the List is empty. This lets you show something else if appropriate.
It is optional -- you can leave it off.
Note that the generated QText will have the HEADER on a separate line from the DETAILS. This is
usually what you want. It means that, for example, if you start the HEADER with "###", it will show
up as a true header, separate from the DETAILS, but if it is just something like "Contents:", the
HEADER and DETAILS will run together, since QText joins ordinary text lines together.
