On 17 February 2010 22:24, metaperl <[email protected]> wrote:
> Hi, the ref manual <http://clojure.org/special_forms> introduces :keys
> which I understand. It then says:
>
> """There are similar :strs and :syms directives for matching string
> and symbol keys."""
>
> but no example is given. Could someone supply an example for each of
> these directives please? I simply am finding the manual too terse
> here.
user=> (let [{:keys [fred]} {:fred "I'm fred"}] fred)
"I'm fred"
user=> (let [{:strs [fred]} {"fred" "I'm fred"}] fred)
"I'm fred"
user=> (let [{:syms [fred]} {'fred "I'm fred"}] fred)
"I'm fred"
:keys binds fred to the value in the map found with key :fred
:strs binds fred to the value in the map found with key "fred"
:syms binds fred to the value in the map found with key which is
a symbol fred
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