hey, I copy this code from tutorial,

(ns project-euler.problem3
  (:use [clojure.contrib.lazy-seqs :only (primes)])
  (:use [clojure.contrib.math :only (sqrt)]))

1. Unhandled java.io.FileNotFoundException
   Could not locate clojure/contrib/lazy_seqs__init.class,
   clojure/contrib/lazy_seqs.clj or clojure/contrib/lazy_seqs.cljc on
   classpath. Please check that namespaces with dashes use underscores
   in the Clojure file name.

i don't recognize those files and neither does clojure. what library are you using?

I learn from this tutorial https://github.com/mishadoff/project-euler/blob/master/project.clj

did you add the org.clojure/clojure-contrib "1.2.0" to your project.clj file and restart your repl?

sorry, I forget it

@dpsutton by the way, how do I now the latest version of clojure-contrib ??

That repo is not active and it has been broken out into several constituents

But I usually just go to the project repo and check the documentation

@dpsutton may I ask more about it, how can I find the repo for org/clojure/clojure-contrib?

I just googled it and it was the second or third result

Whatever tutorial you are using is a bit old though

is the repo

how to import sqrt into clojure, I failed with this code

(ns project-euler.problem3
  (:use [java.lang.Math :only [sqrt]]))

You can’t do that with methods from Java like that

I think at this point you should ask questions in #beginners as the CIDER part seems largely solved