Yes, the alter-var-root function allows you to change a var's definition:
(alter-var-root
#'fetch-data
(fn [original-fetch-data]
(fn [& args]
(let [result (apply original-fetch-data args)]
(transform-result result))))))
On Sat, 19 Jan 2019 at 14:58, Janko Muzykant <[email protected]> wrote:
> Hi,
>
> Is there an way to replace body of existing (interned) function with own
> code still being able to call original fn?
> Suppose, I have a function:
>
> (defn fetch-data [arg1 arg2]
> (db/fetch-data ...))
>
> I would like to intern a slightly modified version of this fn. Something
> like this:
>
> (defn fetch-data [& args]
> (let [result (apply original-fetch-data args)]
> (transform-result result)))
>
> The problem I see is how to keep the reference to original fetch-data fn
> (here denoted by original-fetch-data),
> so it could be still called in a altered version of fetch-data function.
>
> Best,
> JM.
>
>
>
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booleanknot.com
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