Things I figured out about Haskell today

[maradydd]

• Maybe is the same thing as Kleene ? (the "zero or one" operator in regular expressions).
• A typeclass is the same thing as an STL concept, but a typeclass actually means it.
• instance means "We're going to make this data type an instance of this typeclass, and here's how."

Now if I can just get my head around monads, I'm set.

Comments

[alexey-rom.livejournal.com]

See the paper "A comparison of C++ concepts and Haskell type classes": http://publications.lib.chalmers.se/cpl/record/index.xsql?pubid=72479

[maradydd.livejournal.com]

Thanks! That was a fun paper.

[oddthink.livejournal.com]

Haskell is fun, but it takes some work to understand all the type classes. Have you seen the "Typeclassopedia" by Brent Yorgey? It helped me wrap my head around some of the abstractions.