Hi,
Fairly-new Clojure enthusiast here, currently using Clojure to work through
projecteuler.net problems as a means of learning. While using sets on one
of the PE problems, I encountered what *might* be a bug. I admit that I
haven't searched the backlog of messages from this group or the issues on
GitHub, so if this is already known I apologize.
Here is the issue: I discovered that I could pass a list as the second
parameter to set/union, and it would be merged into the the set passed as
the first parameter and the new resulting set returned. However, if the
number of items in the list exceeds the number of items in the set, then
the return value is a list with any duplicate elements completely present.
To illustrate, here is a snippet from my REPL:
user=> (require '[clojure.set :as set])
nil
user=> (set/union #{1 2 3} #{2 3 4})
#{1 4 3 2}
user=> (set/union #{1 2 3} #{2 3 4 5})
#{1 4 3 2 5}
user=> (set/union #{1 2 3} (list 2 3 4))
#{1 4 3 2}
user=> (set/union #{1 2 3} (list 2 3 4 5))
(2 3 1 2 3 4 5)
Note that the last expression yields a list of 7 elements rather than a set
of 5.
I have not tried this with more than two arguments, so I don't know that
would affect the output. I did try putting a list as the first parameter,
and that results in a list return value all the time.
Is this a bug? Should I file a GitHub issue on this? I first encountered
this in 1.7.0, but I recently updated to 1.8.0 and it is still present.
Randy
--
Randy J. Ray - randy.j....@gmail.com - twitter.com/rjray
Silicon Valley Scale Modelers: http://www.svsm.org
Sunnyvale, CA
--
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
---
You received this message because you are subscribed to the Google Groups
"Clojure" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to clojure+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
