This page is not created by, affiliated with, or supported by Slack Technologies, Inc.
2018-11-20
Channels
- # announcements (2)
- # architecture (5)
- # beginners (118)
- # cider (5)
- # clara (13)
- # cljdoc (8)
- # cljs-dev (49)
- # cljsjs (2)
- # clojure (107)
- # clojure-dev (9)
- # clojure-europe (3)
- # clojure-italy (58)
- # clojure-japan (2)
- # clojure-nl (6)
- # clojure-spec (89)
- # clojure-uk (27)
- # clojurescript (9)
- # core-async (33)
- # cursive (2)
- # datascript (2)
- # datomic (31)
- # duct (4)
- # emacs (1)
- # events (1)
- # figwheel-main (1)
- # fulcro (69)
- # hoplon (7)
- # hyperfiddle (16)
- # incanter (4)
- # instaparse (4)
- # kaocha (1)
- # mount (2)
- # nrepl (19)
- # off-topic (40)
- # onyx (6)
- # other-languages (3)
- # pedestal (2)
- # re-frame (48)
- # reagent (2)
- # reitit (10)
- # ring-swagger (9)
- # shadow-cljs (63)
- # spacemacs (13)
- # sql (8)
Why don't both these thing give me the same result?
(d/q '[:find ?a
:in [[?a]]
:where
[(> ?a 2000)]
[(even? ?a)]
[(= 1090 (/ ?a 2))]]
(map vector (range 0 20000)))
(->>
(range 0 20000)
(filter #(> % 2000))
(filter even?)
(filter #(= 1090 (/ % 2))))
You can't call a function in a function in datascript:
(datascript.core/q '[:find ?a
:in [[?a]]
:where
[(> ?a 2000)]
[(even? ?a)]
[(/ ?a 2) ?aover2]
[(= 1090 ?aover2)]]
(map vector (range 0 20000)))
4