Re: SubVector's (via 'subvec') do not support 'transient'
On Apr 30, 8:16 pm, Nathan Sorenson n...@sfu.ca wrote: Yes but the contract of subvec is that it returns a persistent vector and the resulting data structure returns true under the vector? predicate. I know that subvec returns a different type because I've looked at the Java source code but that's a leaky abstraction. Agreed, looks like a bug to me. I'll see if I can fix it in the separate clj-ds project, which you can then use until there is an official clojure fix. Karl On Apr 30, 10:57 am, Ken Wesson kwess...@gmail.com wrote: On Sat, Apr 30, 2011 at 11:27 AM, Armando Blancas armando_blan...@yahoo.com wrote: On Apr 29, 10:54 am, Nathan Sorenson n...@sfu.ca wrote: (transient (subvec [1 2 3 4 5] 0 2)) fails with a class cast exception. Is this expected/unavoidable? How do I know whether the vectors I'm passed are regular vectors or come via subvec? I'm assuming I lose all the performance benefits of subvec if I defensively pour all vectors into a new vector before calling transient? I'm on clojure 1.3.0-alpha4 Check this out:http://clojure.org/Transients There is no mention of subvec on that page. -- 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
Re: SubVector's (via 'subvec') do not support 'transient'
Check this out: http://clojure.org/Transients On Apr 29, 10:54 am, Nathan Sorenson n...@sfu.ca wrote: (transient (subvec [1 2 3 4 5] 0 2)) fails with a class cast exception. Is this expected/unavoidable? How do I know whether the vectors I'm passed are regular vectors or come via subvec? I'm assuming I lose all the performance benefits of subvec if I defensively pour all vectors into a new vector before calling transient? I'm on clojure 1.3.0-alpha4 -- 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
Re: SubVector's (via 'subvec') do not support 'transient'
I've read that, and the claim seems to be that Vectors support transience. Within Clojure's abstraction SubVectors are Vectores: (vector? (subvec [1 2 3] 0 2)) = true. On Apr 30, 8:27 am, Armando Blancas armando_blan...@yahoo.com wrote: Check this out:http://clojure.org/Transients On Apr 29, 10:54 am, Nathan Sorenson n...@sfu.ca wrote: (transient (subvec [1 2 3 4 5] 0 2)) fails with a class cast exception. Is this expected/unavoidable? How do I know whether the vectors I'm passed are regular vectors or come via subvec? I'm assuming I lose all the performance benefits of subvec if I defensively pour all vectors into a new vector before calling transient? I'm on clojure 1.3.0-alpha4 -- 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
Re: SubVector's (via 'subvec') do not support 'transient'
On Sat, Apr 30, 2011 at 11:27 AM, Armando Blancas armando_blan...@yahoo.com wrote: On Apr 29, 10:54 am, Nathan Sorenson n...@sfu.ca wrote: (transient (subvec [1 2 3 4 5] 0 2)) fails with a class cast exception. Is this expected/unavoidable? How do I know whether the vectors I'm passed are regular vectors or come via subvec? I'm assuming I lose all the performance benefits of subvec if I defensively pour all vectors into a new vector before calling transient? I'm on clojure 1.3.0-alpha4 Check this out: http://clojure.org/Transients There is no mention of subvec on that page. -- 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
Re: SubVector's (via 'subvec') do not support 'transient'
Yes but the contract of subvec is that it returns a persistent vector and the resulting data structure returns true under the vector? predicate. I know that subvec returns a different type because I've looked at the Java source code but that's a leaky abstraction. On Apr 30, 10:57 am, Ken Wesson kwess...@gmail.com wrote: On Sat, Apr 30, 2011 at 11:27 AM, Armando Blancas armando_blan...@yahoo.com wrote: On Apr 29, 10:54 am, Nathan Sorenson n...@sfu.ca wrote: (transient (subvec [1 2 3 4 5] 0 2)) fails with a class cast exception. Is this expected/unavoidable? How do I know whether the vectors I'm passed are regular vectors or come via subvec? I'm assuming I lose all the performance benefits of subvec if I defensively pour all vectors into a new vector before calling transient? I'm on clojure 1.3.0-alpha4 Check this out:http://clojure.org/Transients There is no mention of subvec on that page. -- 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
