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[CLJ-1179] distinct? does not accept zero arguments Created: 09/Mar/13  Updated: 04/Jan/14  Resolved: 12/Apr/13

Status: Closed
Project: Clojure
Component/s: None
Affects Version/s: Release 1.4, Release 1.5
Fix Version/s: None

Type: Enhancement Priority: Minor
Reporter: Jean Niklas L'orange Assignee: Unassigned
Resolution: Declined Votes: 0
Labels: bug

Attachments: Text File clj-1179-distinct-zero-arguments.txt    
Patch: Code

 Description   

distinct? cannot be invoked with zero arguments. When using the pattern (apply distinct? x), this is bothersome as you have to check whether x is empty or not. It is also logical that distinct? should return true if no arguments are given, since there are no duplicates.

What (small set of) steps will reproduce the problem?

user=> (apply distinct? [])
ArityException Wrong number of args (0) passed to: core$distinct-QMARK-  clojure.lang.AFn.throwArity (AFn.java:437)

What is the expected output? What do you see instead?

I would expect distinct? to return true whenever given zero arguments.

What version are you using?

This was tested under Clojure 1.4 and Clojure 1.5.



 Comments   
Comment by Jean Niklas L'orange [ 09/Mar/13 6:08 AM ]

Attached the straightforward patch which solves this issue.

Comment by Devin Walters [ 04/Jan/14 1:32 PM ]

Is there a reason this was closed without a comment?

Comment by Alex Miller [ 04/Jan/14 2:12 PM ]

Rich declined it, implying that it was not a change he wanted. Not sure of the reason.

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