If you first language is LISP probably you find easy Haskell and difficult pearl.

Hi, my first programming language is lisp (that is, the language I am most fluent in -- recently Common Lisp, earlier Scheme) and I find Haskell a problematic programming language (this is a fresh experience -- I am writing a syndrome-networks based DSS in Haskell now) because it is not a language. Lisp is a language and Haskell is not, in the sense that lisp allows to write programs that can be read aloud and understood from reading the code. Haskell is a notation that is not a literature by itself, and for Haskell, literate programming, that is, writing more comments than code, is a must; while for lisp it is a rather exotic practice. David