Lenses and software transactional memory are covered in my book "Beginning
Haskell" http://www.apress.com/9781430262503
To the list of things that blew my mind, I would like to add data type
generic programming (in the style of GHC.Generics), something which is
really useful but not that discussed.
2014-11-03 23:53 GMT+01:00 Jeffrey Brown
What concepts relatively unique to Haskell are powerful, widely applicable, and not mentioned in most introductory texts? (By "relatively unique to Haskell" I mean maybe they're part of Lisp or Scheme, but not, say, Java.)
Some of the concepts important to Haskell, such as lambda expressions and recursion, are also present in more popular languages. Many others, though, either have no equivalent in (most) other languages, or else are very unlike the equivalent:
types, classes and kinds higher-order functions evaluation partial application tail recursion laziness currying pattern matching application and composition operations contexts functors, applicatives, monads monad transformers * lenses* * :def macros* * arrows* * continuation passing style* * software transactional memory*
Most of those topics appear to be covered by introductory texts, but the last five are not. I found each of them by accident, and each kind of blew my mind. They all strike me as powerful, widely applicable, and obscure.
Are there others?
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