Re: Bug in count for hash-maps with nil values
On Fri, Sep 25, 2009 at 1:46 AM, Richard Newman holyg...@gmail.com wrote: I guess this is already ticketed. I should have searched first, sorry for the noise. It's not already ticketed, even if the root cause might be the same. As I pointed out in my message, these are not hash maps, they're array maps. It's the same root cause, and it has to do with hash maps. When the 9-item hash map is built the bug causes its count to drop to zero (but calling seq on it reveal there are 9 key-value pairs in it). But, the compiler optimizes literal maps whose count is zero into the empty array map. So, really, it's not a bug in PersistentArrayMap and the patch against PersistentHashMap attached to #192 fixes this behaviour. I'm sorry to have introduced this bug. Christophe --~--~-~--~~~---~--~~ 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: Bug in count for hash-maps with nil values
Can anyone else confirm?
I see the same thing. Both working and non-working lengths are
PersistentArrayMaps, so this isn't a hash map thing.
user= (type {1 nil 2 nil 3 nil 4 nil 5 nil 6 nil 7 nil 8 nil 9 nil})
clojure.lang.PersistentArrayMap
user= (type {1 nil 2 nil 3 nil 4 nil 5 nil 6 nil 7 nil 8 nil})
clojure.lang.PersistentArrayMap
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Re: Bug in count for hash-maps with nil values
Confirmed. I'm using clojure from git:
$ git status
# On branch master
nothing to commit (working directory clean)
I also tried with the ':'
Clojure= (count {:1 nil :2 nil :3 nil :4 nil :5 nil :6 nil :7 nil :8
nil :9 nil})
0
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Re: Bug in count for hash-maps with nil values
I guess this is already ticketed. I should have searched first, sorry for the noise. http://www.assembla.com/spaces/clojure/tickets/192-hashmaps--count-is-not-always-updated-when-associng-dissocing-a-nil-key -Jason --~--~-~--~~~---~--~~ 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: Bug in count for hash-maps with nil values
I guess this is already ticketed. I should have searched first, sorry for the noise. It's not already ticketed, even if the root cause might be the same. As I pointed out in my message, these are not hash maps, they're array maps. You should file a new ticket and refer to #192. --~--~-~--~~~---~--~~ 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 -~--~~~~--~~--~--~---
