Andreas Kostler wrote:
> Hi all,
> Suppose I have the following function:
> (defn foo [x changeling]
> (cond
> (= (first x) 'bar)
> (map #(foo % changeling) (rest x))))
>
> (def foobar (atom {:something "in-here"}))
>
> Now, changeling gets bound to (atom {:something "in-here"}).
Erm.. no? where?
> The
> conditional in foo might contain another case that actually changes
> changeling.
As a matter of style and readability: don't do that. Have (foo
whatever) return a new value for whatever, then use (swap! foobar foo)
or something similar.
> How can I avoid the binding of changeling to the initial value of the
> atom and have the anonymous function passed to map use the current
> (possibly changed) value of changeling?
You might not want to do this in any function passed to map, since map
is lazy.
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