1. new in this version
2. build a web 2.0 app in happstack
3. why happstack is cool
4. getting started with happstack
5. prerequisites
6. cabal install me
7. first shot at happstack
8. url handling
9. basic HTML inclusion
10. templates
11. stringtemplate basics
12. debugging
13. form data: get and post
14. form data: file uploads
15. cookies
16. introduction to macid
17. first steps with macid
18. scaling with multimaster
19. using macid safely
20. macid dummy data
21. changing the data model
22. macid stress test
23. limitations of macid
24. foreign characters
25. IxSets
26. cron jobs
27. thanks
28. appendix (floundering in ghci)

Introduction to IxSet

There's another utility package included in the Happstack suite, happstack-ixset, which you might find useful

In a nutshell, the package provides a module Happstack.Data.IxSet, that defines a new data type which acts an awful lot like the old familiar Data.Map but allows you to easily select subsets based upon component data.

An example is included with this tutorial at IxSetExample.hs.

I suggest reading over the code included to supplement the haddock documentation for Happstack.Data.IxSet and playing with all of the values starting with "ex" to make sure you feel comfortable with the values they have and why.

I make no attempt to cover all of the combinators defined in Happstack.Data.IxSet, but I hope I cover enough of them to give you a good start.

A final note about IxSet is that if the contained type is an instance of Serialize, then the entire IxSet will be an instance of Serialize thus making it suitable for use with Happstack.State