參考資料

Haskell 相關書籍

Programming in Haskell, by Graham Hutton. Cambridge University Press, 2007
Introduction to Functional Programming using Haskell (2nd Edition), by Richard Bird. Prentice Hall 1998

Learn You a Haskell for Great Good! by Miran Lipovača: a nice tutorial with cute drawings!
Yet Another Haskell Tutorial, by Hal Daume III. s A well-respected and comprehensive tutorial for learning Haskell.
A Gentle Introduction to Haskell, by Paul Hudak, John Peterson, and Joseph H. Fasel: a bit old, but still worth a read.
Real World Haskell, by Bryan O’Sullivan, Don Stewart, and John Goerzen. O’Reilly Media 2008. A very popular resource freely available online. It assumes some basic knowledge of Haskell, however.

如何知道有哪些函數可用？

GHC 有一個龐大的 Haskell Hierarchical Libraries. 從該網頁可看到各 library 的說明，通常由函數的型別與說明即可猜出該函數的意思。若有需要，按 “source” 可看到原始碼。目前我們可能用到的函數大多在 Prelude 與 Data.List之中。
更多各種用途的 Haskell 函數庫可到 Hackage 搜尋。