On Mon, Apr 9, 2012 at 7:54 AM, Jim - FooBar(); <[email protected]>wrote:
> Hello everyone...
>
> Can somebody please provide some insight as to why
> (`+ 1 2) => 2 and
> ('+ 1 2) => 2 ???
>
> Thanks in advance...
>
> Jim
>
> ps. I understand that symbols are functions that look themselves up in
> sequences but here i'm not passing a seq - instead i'm passing 2 args!
> Shouldn't there be an error?
>
> When symbols and keywords are in function position, (as you say) they look
themselves up "in" the second argument. The third argument specifies a
not-found value. Since "1" isn't a collection, it will always result in
not-found.
(:key {} :not-found) => :not-found
('key {} :not-found) => :not-found
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