Thanks for the answer. If I understand well your code it's a partial answer to my question because if I'm not wrong it creates a link between to elements at a time. What I need is to create all the elements then create on them every kind of relation. I take as example a graph db used in another engine https://raw.githubusercontent.com/wiki/thinkaurelius/titan/images/graph-of-the-gods-2.png Here you have a graph of Roman gods, with the name of the gods and the links among them. So if I have for example a list of the names of Roman gods I need to create all the nodes, then connect them in various mode. I want to take the list '("jupiter" "saturn" "hercules" "neptune" "pluto" ...) and cycling on it I want to creare the nodes. When I finished to create them I need to be able to call every node to crete the various links among them. For example I need to link jupiter with pluto, jupiter with neptun, neptun with pluto and so on.
Thanks Francesco On Tuesday, June 10, 2014 7:43:21 PM UTC+2, Paul G wrote: > > Hi Francesco, > > You want to decouple your code from the data that it is operating on, so > your code can operate regardless of the contents of the list. Otherwise, > you'll need code that matches the list, in which case it could all be code > anyway. Operating on arbitrary lists makes it easy to test simple examples > too. > > A simple way to create links between pages might be like this (assuming > that conn is in scope and initialized): > > (for [list-elt1 the-list, list-elt2 the-list :when (not= list-elt1 > list-elt2)] > (let [page1 (page-fn list-elt1) > page2 (page-fn list-elt2) > rel (nrl/create conn page1 page2 :links)] > ;; do something with rel > )) > > This creates links both ways. > > If you only want one-way links then the first approach that comes to mind > (there are others, and they're probably better) is to index through the seq: > > (for [n (range (count the-list)), m (range (inc n) (count the-list))] > (let [page1 (page-fn (nth the-list n)) > page2 (page-fn (nth the-list m)) > rel (nrl/create conn page1 page2 :links)] > ;; do something with rel > )) > > The general idea here is to use an arbitrary var to represent your list > elements and pages. > > Does this address your issue? > > Regards, > Paul > > > > On Tue, Jun 10, 2014 at 1:04 PM, Francesco Lunelli <francesc...@gmail.com > <javascript:>> wrote: > >> Thanks for the answer, I try to explain better what I have to do. >> >> I need to create some nodes in Neo4j then I need to create relationships >> between those nodes. >> >> This is an example taken from necons doc. >> >> (let [conn (nr/connect "http://localhost:7474/db/data/";) >> page1 (nn/create conn {:url "http://clojurewerkz.org"}) >> page2 (nn/create conn {:url "http://clojureneo4j.info"}) >> ;; a relationship that indicates that page1 links to page2 >> rel (nrl/create conn page1 page2 :links)] >> (println rel))) >> >> They create two nodes called page1 and pag2 then connect them. >> >> In my case I have a list of names, I want to create one node for each of >> them with the possibility to work on nodes after they are created. >> So if I have for example a list like this one (def mylist '(j"john" >> "paul" "mary")) I want to create three nodes calling them john paul and >> mary storing the value "John" "Paul" "Mary" and after having created them I >> want to be albe to connect nodes creating a relationship among them, with a >> funciont like rel (nrl/create conn john paul :friend)] >> >> I hope this example explain better my needs. >> >> Thanks in advance >> >> Francesco >> >> >> On Tuesday, June 10, 2014 6:11:16 PM UTC+2, James Reeves wrote: >> >>> Could you explain a little more what your end goal is? >>> >>> It sounds like you want a map, but without knowing more about the >>> purpose, it's difficult to say. >>> >>> - James >>> >>> >>> On 10 June 2014 16:43, Francesco Lunelli <francesc...@gmail.com> wrote: >>> >>>> Hello everybody, I have a newbie question about destructuring and >>>> assigning and didn't find an answer in documentation or books. >>>> >>>> I have a list that contains an arbitrary number of elements for example >>>> '("one" "two" "three" ...) I now only that elements are strings. >>>> >>>> I need to to take every element and use it as the name of a variable >>>> inside a let and assign the result of a funcion on that element to that >>>> variable. >>>> Somthing like this for example: >>>> >>>> (let [one (clojure.string/capitalize "one") >>>> two (clojure.string/capitalize "two") >>>> three (clojure.string/capitalize "three")] >>>> ;; here I have access to vars one two three etc. >>>> ) >>>> >>>> where the names of the vars are taken from the list and values are >>>> obtained applying a function on the corresponding element of the list (the >>>> capitalize function il only an example, it could be everything else). >>>> >>>> If I do in this way >>>> (for [word ["the" "quick" "brown" "fox"]] (let [word >>>> (clojure.string/capitalize word)] (prn word))) >>>> it works, but I need to access the variables outside of the cycle for, >>>> after having defined and assigned everyone because I need to put in >>>> relation some of them. >>>> >>>> Thanks to everybody >>>> >>>> Francesco >>>> >>>> >>>> >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "Clojure" group. >>>> To post to this group, send email to clo...@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+u...@googlegroups.com >>>> >>>> For more options, visit this group at >>>> http://groups.google.com/group/clojure?hl=en >>>> --- >>>> You received this message because you are subscribed to the Google >>>> Groups "Clojure" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to clojure+u...@googlegroups.com. >>>> >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> >>> -- >> You received this message because you are subscribed to the Google >> Groups "Clojure" group. >> To post to this group, send email to clo...@googlegroups.com >> <javascript:> >> Note that posts from new members are moderated - please be patient with >> your first post. >> To unsubscribe from this group, send email to >> clojure+u...@googlegroups.com <javascript:> >> For more options, visit this group at >> http://groups.google.com/group/clojure?hl=en >> --- >> You received this message because you are subscribed to the Google Groups >> "Clojure" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to clojure+u...@googlegroups.com <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> > > -- 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 --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
