View specing_oddly_shaped_data.clj
(require '[clojure.spec.alpha :as s])
(s/def ::coord nat-int?)
(s/def ::x ::coord)
(s/def ::y ::coord)
(s/def ::xy (s/keys :req-un [::x ::y]))
(s/def ::point (s/map-of #{:point} ::xy))
(s/def ::username (s/and string? seq))
(s/def ::user (s/map-of #{:user} ::username))
View java_tx_fn_in_clojure.clj
(require '[datomic.api :as d])
(def uri "datomic:mem://foo")
(d/create-database uri)
(def conn (d/connect uri))
(def schema [{:db/ident :foo
:db/fn #db/fn
{:lang "java"
:params [db a b c]
:code "return a;"}}])
View clj-xchart-examples.clj
(def argses (->> (s/exercise ::cs/xy-chart-args 10 ex/generators)
(mapv first)))
View transcriptor-example.clj
(require '[cognitect.transcriptor :refer (check!)])
(+ 1 2)
(check! pos-int?)
View clojure_spec_missing_piece.clj
;; clojure.spec's missing piece, work in progress
;; this is only halfway done, somebody else will need to do the other 95%
(require
'[clojure.spec :as s]
'[clojure.spec.test :as test])
(defn naive-english-explain
"Copy and paste this into your app. Figure out what it does by
trying it in production."
View errors_as_data.clj
;; spec errors are data, and as such are composable with all the rest
;; of Clojure. The forms below show getting to an interesting part
;; of an error in a larger data structure, taking advantage of
;; edn-reading, pretty-printing, *print-length* and threading macro.
;; It is difficult to maintain the compositionality shown here
;; once you convert error data into e.g. ASCII art.
(require
'[clojure.edn :as edn]
View client_transduce_skeleton.clj
(a/transduce
(comp
(halt-when error?)
(map ...)
(filter ...))
(completing ...)
accumulator
query)
View add_at.clj
;; non-working add-at
(require '[boot.core :as core]
'[boot.tmpdir :as tmpd]
'[clojure.java.io :as io])
(deftask add-at
"Like sift :add-*, but lets you make a dest path in fileset"
[r rolekey ROLEKEY kw "rolekey"
s source SOURCE file "source path in project"
d dest DEST file "dest path in fileset"]
View gist:736cd82a51eb9ad24c65bfcac06f5101
(s/keys :req [::first-name
::last-name
::middle-initial])
(s/keys :req [::first-name
::last-name
::middle-initial]
:opt-un [::middle-name])
View log_size.clj
;; bin/run log_size.clj DB-URI t
;; Estimates the total in-memory size of all log entries from t to end of data.
;; Scans log from t to the end, so run against a backup instead of production if possible!
(require
'[clojure.edn :as edn]
'[clojure.pprint :as pp]
'[datomic.api :as d]
'[datomic.memory-size :as size])