dvliman

# Turn on the simulator screen capture
xcrun simctl io booted recordVideo ~/simulator.mov

# Convert the iPhone 6s screen shot into a gif:
ffmpeg -i ~/simulator.mov -vf scale=320:-1 -r 6 -f gif -y simulator.gif

dvliman

(defn pgobj->clj [^org.postgresql.util.PGobject pgobj]
  (let [type (.getType pgobj)
        value (.getValue pgobj)]
    (case type
      "json" (cheshire.core/parse-string value true)
      "jsonb" (cheshire.core/parse-string value true)
      "citext" (str value)
      value)))

(extend-protocol next.jdbc.result-set/ReadableColumn

dvliman

  ;; File: src/some_app/middleware.clj  
  (defn open-gates [request]
       true)
  (def rules [{:pattern #"^/admin.*"
         :handler admin-access
         :redirect "/notauthorized"},
        {:pattern #"^\/vclass.*"
         :handler user-access
         :redirect "/notauthorized"},
        {:pattern #"^\/api.*"

dvliman

(defn ->Function
  [f]
  (reify java.util.function.Function
    (apply [_ obj] (f obj))))
(defn future-map
  [cf f]
  (.thenApply cf (->Function f)))
(defn future->ch
  ([cf]
   (future->ch cf (async/chan 1) true))

dvliman

(ns plokal.cheshire
  (:require [cheshire.generate :refer [add-encoder]]
            [cheshire.core :as json])
  (:import [com.fasterxml.jackson.core JsonGenerator]
           (org.postgresql.geometric PGpoint)))

(add-encoder
  PGpoint
  (fn [^PGpoint data ^JsonGenerator jsonGenerator]
    (.writeString jsonGenerator (json/generate-string {:type :Point

dvliman

 go env
GOARCH="amd64"
GOBIN="/usr/local/go/bin"
GOCACHE="/Users/dv/Library/Caches/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/dv/go"

dvliman

interview-mind-map

dvliman

concurrency-models

dvliman

Keybase proof

I hereby claim:

• I am dvliman on github.
• I am dvliman (https://keybase.io/dvliman) on keybase.
• I have a public key ASBe4DkFe9qsB1j_Dc89k_Vd2euOfMD-Qz4FXTtbNRwTtwo

To claim this, I am signing this object:

dvliman

Spike

I looked into the state of GraalVM and Clojure and wrote some small work-related scripts.

GraalVM Build Tools

• Downloaded GraalVM and set $GRAALVM_HOME
• Found two main libraries for building GraalVM CLIs - https://github.com/luchiniatwork/cambada#packaging-as-a-native-image and https://github.com/taylorwood/clj.native-image (or https://github.com/taylorwood/lein-native-image for the lein equivalent). I chose clj.native-image as it seemed more focused on doing one thing well.
• First tried its template example which was easy to follow.
• Then added a graalvm build to one of our small cli tools
• Found it to be pretty straightforward except for a stdout flushing issue that was trivial to fix