stuarthalloway

(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))

stuarthalloway

(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;"}}])

stuarthalloway

(def argses (->> (s/exercise ::cs/xy-chart-args 10 ex/generators)
                 (mapv first)))

stuarthalloway

(require '[cognitect.transcriptor :refer (check!)])

(+ 1 2)
(check! pos-int?)

stuarthalloway

;; 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."

stuarthalloway

;; 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]

stuarthalloway

(a/transduce
  (comp
    (halt-when error?)
    (map ...)
    (filter ...))
  (completing ...)
  accumulator
  query)

stuarthalloway

;; 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"]

stuarthalloway

(s/keys :req [::first-name
              ::last-name
              ::middle-initial])


(s/keys :req [::first-name
              ::last-name
              ::middle-initial]
        :opt-un [::middle-name])

stuarthalloway

;; 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])