Really nice example Peter, Thanks, I appreciate it. On Sep 3, 6:36 am, Peter Buckley <buckmeist...@gmail.com> wrote: > I'm only a little ways through Joy of Clojure (my first Clojure book) > but bear with me as I'm thinking aloud on what it means for me to > "think in Clojure." I hope list members will forgive me if I get > things wrong - and please correct my working concept(s) as well. > > One of the things that stuck out for me that I heard somewhere (can't > remember exactly) was that OOP is about framing questions in terms of > "nouns" and FP is about framing questions in terms of "verbs." > > Partly for my own benefit (and the list's critique and refinement) I > want to talk about this as it relates to an example. The first task > I'm working on in Clojure is taking a text file which is sortof a > template, and then removing/adding/changing certain lines/strings in > it based on an xml kindof config file, in the end spitting out an > improved text file. > > If I was in the OOP frame of mind, I would have a class to represent > my text file, and a class to represent my xml file. There would > possibly be a shared base class to let me share the common slurping > (reading of lines) from the files. As verb-y as that is (I hope > Clojure is polluting my thought process already!) the base class would > probably be called "File" or something super noun-y. In any case, the > classes, the files, these are all "nouns." > > But in the FP frame of mind, I just have data or information, and the > focus is on the transformations that I do with the data. The > transformations are things like zip-my-xml-into-a-struct-map or > read-my-lines-into-a-seq and replace-text-values-with-xml-values. The > focus is on the actions (verbs being action words), and the functions > are essentially the "verbs." > > I feel like I'm starting to get the concept of thinking in a > function-al way, although I have a lot of work to do yet on learning > Clojure the language. > > HTH, > Peter > > > > > > On Thu, Sep 2, 2010 at 10:02 PM, Wilson MacGyver <wmacgy...@gmail.com> wrote: > > I highly recommend "Joy of Clojure". It's a good "2nd book on clojure". > > It shows you the "why things are the way they are", and how to > > do things the clojure way as much as possible. > > > On Thu, Sep 2, 2010 at 9:29 PM, HB <hubaghd...@gmail.com> wrote: > >> Hey, > >> I finished reading "Programming Clojure" and "Practical Clojure" and > >> I'm hooked :) > >> Please count me in the Clojure club. > >> But I failed how to think in Clojure. > >> My main career is around Java web applications (Hibernate, Spring, > >> Lucene) and Web services. > >> Lets not talk about Java web frameworks neither Clojure ones, I want > >> to talk in general. > >> Usually we create some domain entities, map them with Hibernate/ > >> iBatis. > >> I don't know how a Clojure application would be build without objects. > >> I think Scala really shines here, this OOP/FP is really powerful > >> approach (please note I'm not saying Clojure isn't good, I don't seel > >> flame war) > >> How to think in Clojure? how to achieve this shift? > > > -- > > Omnem crede diem tibi diluxisse supremum. > > > -- > > You received this message because you are subscribed to the Google > > Groups "Clojure" group. > > To post to this group, send email to clojure@googlegroups.com > > Note that posts from new members are moderated - please be patient with > > your first post. > > To unsubscribe from this group, send email to > > clojure+unsubscr...@googlegroups.com > > For more options, visit this group at > >http://groups.google.com/group/clojure?hl=en > > -- > The king’s heart is like a stream of water directed by the Lord; He > guides it wherever He pleases.
-- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
