Expands into code that creates a fn that expects to be passed an
object and any args and calls the named instance method on the
object passing the args. Use when you want to treat a Java method as
a first-class fn.
user=> (def *files* (file-seq (java.io.File. "/tmp/"))) #'user/*files* user=> (count (filter (memfn isDirectory) *files*)) 68 user=> (count (filter #(.isDirectory %) *files*)) 68
Source
clojure/core.clj:3412
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(defmacro memfn
"Expands into code that creates a fn that expects to be passed an
object and any args and calls the named instance method on the
object passing the args. Use when you want to treat a Java method as
a first-class fn."
{:added "1.0"}
[name & args]
`(fn [target# ~@args]
(. target# (~name ~@args))))
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