schmich

Programming Media Keys on the Ducky One 2 Skyline

To use media keys on the Ducky One 2 Skyline, you must record a macro to bind the media function to a hotkey combination, i.e. Fn plus some key.

Example

Important: In the instructions below, "Press X+Y+Z" means press and hold key X, press and hold key Y, press and hold key Z in that order, and then release all three.

As an example, to bind Fn+PgUp to the play/pause media function:

rauhs

(ns x.y
  (:use [plumbing.core]) ;; Just for the map-vals
  (:require [clojure.walk :refer [postwalk prewalk prewalk-demo postwalk-demo]]
            [clojure.core.match :refer [match]]
            [schema.utils :refer [named-error-explain validation-error-explain]]
            [schema.core :as s])
  (:import (schema.utils NamedError ValidationError)))

;; Partially FROM:
;; https://github.com/puppetlabs/clj-schema-tools

bhauman

(ns todo-server.core
  (:require
   [cljs.nodejs :as nodejs]
   [figwheel.client :as fw]))

(nodejs/enable-util-print!)

(defonce express (nodejs/require "express"))
(defonce serve-static (nodejs/require "serve-static"))
(defonce http (nodejs/require "http"))

mkwatson

(defmacro while->
  "Takes a predicate, expression, and forms. Threads expr 
  through each form for which applying pred to the returned
  value is true. Threading short circuits after the first 
  false expression."
  [pred expr & forms]
  `(if (~pred ~expr)
     ~(if (not-empty forms)
        (let [next-expr `(-> ~expr ~(first forms))]
           `(if (~pred ~next-expr)

halgari

(ns rabbit-mq-test.core
  (:require [clojure.core.async :refer :all])
  (:import [com.rabbitmq.client ConnectionFactory Connection Channel QueueingConsumer Consumer DefaultConsumer]))

(set! *warn-on-reflection* true)

(defprotocol Lifecycle
  (start [service])
  (stop [service]))

hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD