;; `project` strips out unwanted key/value pairs from a set of maps.
;; Suppose you have these descriptions of cows:
user=> (def cows #{ {:name "betsy" :id 33} {:name "panda" :id 34} })
#'user/cows
;; You care only about the names. So you can get them like this:
user=> (project cows [:name])
#{{:name "panda"} {:name "betsy"}}
;; `project` strips out unwanted key/value pairs from a set of maps.
;; Suppose you have these descriptions of cows:
user=> (def cows #{ {:name "betsy" :id 33} {:name "panda" :id 34} })
#'user/cows
;; You care only about the names. So you can get them like this:
user=> (project cows [:name])
#{{:name "panda"} {:name "betsy"}}
Source
clojure/set.clj:71
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