On Tuesday, May 12, 2015 at 3:34:46 PM UTC-4, Michael Gardner wrote:
>
> On May 12, 2015, at 1:54 PM, Shantanu Kumar <kumar.s...@gmail.com
> <javascript:>> wrote:
> > I agree about the counter-intuitiveness. I'm only wondering whether the
> error message is a bit misleading "contains? not supported on type:
> java.lang.String" because of course (contains? "hello" 2) works fine.
>
> It seems odd that (contains? "abc" 2) works, at least to me. It's clearly
> intentional, from this line in RT.java:
>
> else if(key instanceof Number && (coll instanceof String ||
> coll.getClass().isArray())) {
>
> Can anyone comment on why Strings are explicitly supported here?
Strings and arrays support constant-time access by index. The thing that's
broken is "contains? not supported on type: java.lang.String" instead of
nil when a nonnumeric key is used. One gets nil with a nonnumeric key and a
PersistentVector, rather than an exception.
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