C9 Lectures: Dr. Ralf Lämmel - Advanced Functional Programming - Type Classes
- Posted: Aug 17, 2010 at 12:41PM
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Type classes also take functional or declarative programming to a whole new level—one may define relations and functions pointwisely on types. That is, in the same way a regular function pattern matches on value structure, a type-level function sort of matches
on type-definitional structure. This is quite a mouthful, I know.
There are various extensibility scenarios in the neighborhood of the Expression Problem that are interesting to consider from a design perspective, including several also addressable with type classes, and others that aren't. Look for the riddles (there are indeed several riddles in this lecture); many of them call for a discussion, rather than a straight solution. But beware—some of them are really difficult.
Thank you, Ralf, for another great lecture!
Get the slides for this lecture.
See Lecture 1 - The Expression Problem