On Oct 8, 9:54 am, Martin DeMello <[EMAIL PROTECTED]> wrote: > That was my first thought, but I was hoping there was a library for > this already. It seems to be a surprisingly uncommon use case (not > just in clojure, I've ended up implementing something like that in > several languages) - I'd have thought 2d rectangular arrays were a lot > more popular a data structure than that.
Java doesn't even have real 2-D arrays, just syntactic sugar for array- of-arrays. Storage of the rows (indexing is row-oriented in Java, like in C) is not guaranteed contiguous because Java's representation of 2-D arrays is an array-of-references-to-arrays (e.g., each "row" can have a different length) rather than a contiguous chunk of storage mapped to 2-D indices. It shouldn't be hard to sugar yourself up such a mapping. However, if you find yourself doing this a lot, you might want to think about a more Clojure-like idiom that doesn't require destructive updates and minimizes consing for local changes (e.g., a quadtree). mfh --~--~---------~--~----~------------~-------~--~----~ 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 To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~----------~----~----~----~------~----~------~--~---
