On Mon, Jan 12, 2009 at 5:56 PM, Jason Wolfe <jawo...@berkeley.edu> wrote:
>
> For mapping across maps I often find the following utility helpful:
>
> (defn map-map "Like map, but expects f to produce pairs that are
> combined to produce a map output."
> [f & maps] (reduce #(conj %1 %2) {} (apply map f maps)))
>
> 1:1 user=> (map-map (fn [[k v]] [k (str v " Mark")]) {:greet
> "hello" :farewell "goodbye"})
> {:farewell "goodbye Mark", :greet "hello Mark"}
This is a pattern, isn't it. I've generally used 'for' when I want
destructuring and producing vectors. Combined with 'into' you get:
(into {} (for [[k v] {:greet "hello" :farewell "goodbye"}]
[k (str v " Mark")]))
--Chouser
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