After watching few Richard' Hickey talks I decided to take a look at functional programming. After some researching in internet I choosen to learn Haskell. First time when I seen Haskell code I was scared like most peoples. But then... Haskell is simply awesome. If you are newbie I'd suggest you read this book - this will be useful for any developer. After read it I decided to write small web crawler to summarize what I learn and write post about it. Pls note this post is just my notes to summarize my knowledges, I am do not trying explain clearly FP or haskell monads. If you don't know Haskell suggest you read book first :) My parser has few modules: work with network, parsing, work with DB(Postgre SQL). Here is notes how I did it module by module Network access At the beginning I created very small module which can download html by url. We'll need use HTTP module. Then we can create easy function function which will download html: getHTML:: St