partial returns a closure, closing over a at the time b is defined.

On Wed, Jul 18, 2012 at 7:18 AM, Alice <[email protected]> wrote:
> I'm reading Clojure Programming from O'Reilly.
>
> (defn a [b] (+ 5 b))
> ;= #'user/a
> (def b (partial a 5))
> ;= #'user/b
> (b)
> ;= 10
> (defn a [b] (+ 10 b))
> ;= #'user/a
> (b)
> ;= 10
>
> Redefining a has no effect. But,
>
> (defn foo [] 1)
> ;= #'user/foo
> (defn bar [] (foo))
> ;= #'user/bar
> (bar)
> ;= 1
> (defn foo [] 2)
> ;= #'user/foo
> (bar)
> ;= 2
>
> Shouldn't this also be the same? Why does (bar) evaluates 2 instead of
> 1 this time?
>
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