I have an issue that I think is related to laziness, but I am not sure I understand where the problem lies.
Let's say I have tabular data in a sequence of sequences. I get the second column of the table like this: (map #(nth % 1) my-table) I can do some sequence things directly to the list returned by the call to function, but not everything. For example, (distinct (map #(nth % 1) my-table)) works fine, but (frequencies (map #(nth % 1) my-table)) throws java.lang.RuntimeException: java.lang.IndexOutOfBoundsException My own implementation of frequencies, which is maybe a little naive, throws the same exception. However, if I bind the result of my map call to a variable first and then call frequencies, it works fine: (def my-list (map #(nth % 1) my-table)) (frequencies my-list) It is my understanding that the def does not do anything but give the list an entry in a symbol table, but something is obviously happening. Am I causing a lazy sequence to be populated with concrete values? -- 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
