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Examples 3
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..

clojure.core

Available since 1.0 (source)

(.. x form)
(.. x form & more)

form => fieldName-symbol or (instanceMethodName-symbol args*)
 Expands into a member access (.) of the first member on the first
argument, followed by the next member on the result, etc. For
instance:
 (.. System (getProperties) (get "os.name"))
 expands to:
 (. (. System (getProperties)) (get "os.name"))
 but is easier to write, read, and understand.

© Rich Hickey. All rights reserved. Eclipse Public License 1.0

3 Examples

user> (.. "fooBAR" (toLowerCase) (contains "ooba"))
true

;; use macroexpand to see how the form above will appear
user> (macroexpand '(.. "fooBAR" (toLowerCase) (contains "ooba")))
(. (. "fooBAR" (toLowerCase)) (contains "ooba"))

user=> (.. "abc" toUpperCase (equals "ABC"))
;;=> true

;; With .. you do not need to add a . to your method.
(.. "fooBAR" (toLowerCase) (contains "ooba"))

;; Which you do if using -> instead.
(-> "fooBAR" (.toLowerCase) (.contains "ooba"))