Re: ClassCastException - maybe a bug

[Stephen C. Gilardi]

On Jun 28, 2009, at 11:48 AM, Handkea fumosa wrote:

On Jun 28, 11:27 am, Rich Hickey <richhic...@gmail.com> wrote:

Deducing it doesn't contain 5 because it was passed a key incomparable

to some other key seems like a stretch to me, and bug-hiding.

Clojure is relatively free of exception catching in normal flow of
control, and I'm disinclined to start here.

I don't agree that it is a bug to have (contains? 5 (sorted-set "foo"
"bar" "baz")).

In a call to contains?, the collection is the first argument:

user=> (doc contains?)
-------------------------
clojure.core/contains?
([coll key])
  Returns true if key is present in the given collection, otherwise
  returns false.  Note that for numerically indexed collections like
  vectors and Java arrays, this tests if the numeric key is within the
  range of indexes. 'contains?' operates constant or logarithmic time;
  it will not perform a linear search for a value.  See also 'some'.
nil

The really weird thing is, at my REPL the above yields the expected
false rather than an exception.

--Steve

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