fns are normal values, I guess you got strange glitch, try with the fresh
vm/repl:
(def fff ^{:a 1} (fn [] 4))
#<[object Object]>
=> nil
(meta fff)
=> {:a 1}
(meta ^{:a 1} (fn [] 4))
=> {:a 1}
четверг, 28 мая 2015 г., 10:49:53 UTC+3 пользователь Mike Thompson написал:
> On Thursday, May 28, 2015 at 5:39:54 PM UTC+10, Ruslan Prokopchuk wrote:
>
>
> Okay, thanks, that makes some sense. So, attaching metadata to the var
> rather than the value the var is bound to. Got it.
>
> But ... I then performed this experiment where I feel I am attaching metadata
> to the value ...
>
> (def fff ^{:a 1} (fn [] 4))
>
> (meta fff) ;; => nil
>
> Damn.
>
> And here's what's odd:
>
> (def v ^{:b 1} [1 2 3])
>
> (meta v) ;; => {:b 1 .....}
>
> So, when it comes to metadata, this:
> ^{:a 1} (fn [] 4)
>
> is different to:
> ^{:b 1} [1 2 3]
>
>
> So fns are not normal values? Something else?
>
> I'll get this eventually.
>
> --
> Mike
>
>
>
>
>
> > `with-meta` is the thing which deals with value, you get "an object of the
> > same type and value as obj, with map m as its metadata". But `defn`, which
> > is essentially `(def ... (fn ...` creates a Var, and attaches metadata to
> > that Var, not its value.
> >
> > четверг, 28 мая 2015 г., 10:30:14 UTC+3 пользователь Mike Thompson написал:
> > > On Thursday, May 28, 2015 at 4:55:09 PM UTC+10, Ruslan Prokopchuk wrote:
> > > > (meta #'f)
> > >
> > >
> > > Hmm. I think there's something fundamental I'm not grasping here. But
> > > I'm struggling to ask the right question to get the ahhh moment.
> > >
> > > Perhaps this: why, in my original example code, does (meta f) return
> > > nil, but (meta ff) return {:b 1}. What is different about the
> > > attachment of metadata?
> > >
> > > --
> > > Mike
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