1.9 Manipulating Simple HTML Documents: "docs.ss"
The teachpack provides three operations for creating simple “HTML” documents:
Annotation An Annotation is a symbol that starts with “<” and ends in “>”. An end annotation is one that starts with “</”.
Determines whether or not a Scheme value
is a number, a symbol, or a string.
| (annotation? x) → boolean? |
| x : any/c |
Determines whether or not a Scheme
symbol is a document annotation.
| (end-annotation x) → Annotation |
| x : Annotation |
Consumes an annotation
and produces a matching ending annotation.
| (write-file l) → true |
| l : (list-of atom) |
Consumes a list of symbols and annotations and prints them out as a
"file".
Sample session: set teachpack to “docs.ss”> and click RUN:
| > (annotation? 0) |
| false |
| > (annotation? '<bold>) |
| true |
| > (end-annotation 0) |
| end-annotation: not an annotation: 0 |
| > (write-file (list 'a 'b)) |
| a b |