anmonteiro

var getCountdown = function(targetDate){
    var left = targetDate.getTime() - new Date().getTime();
    var seconds = + ((left / 1000) % 60) ;
    var minutes = + ((left / (1000*60)) % 60);
    var hours   = + ((left / (1000*60*60)));
    
    return hours.toFixed(0)+' h '+minutes.toFixed(0)+' min '+seconds.toFixed(0) + ' s';
  }

anmonteiro

javascript:(function() {
  localStorage.setItem('gameState',
  "{\"grid\":{\"size\":4,\"cells\":[[null,{\"position\":{\"x\":0,\"y\":1},\"value\":2},null,{\"position\":{\"x\":0,\"y\":3},\"value\":4}],[null,null,null,{\"position\":{\"x\":1,\"y\":3},\"value\":4}],[null,{\"position\":{\"x\":2,\"y\":1},\"value\":2},{\"position\":{\"x\":2,\"y\":2},\"value\":16},{\"position\":{\"x\":2,\"y\":3},\"value\":8}],[null,{\"position\":{\"x\":3,\"y\":1},\"value\":4},{\"position\":{\"x\":3,\"y\":2},\"value\":8},{\"position\":{\"x\":3,\"y\":3},\"value\":2048}]]},\"score\":20232,\"over\":false,\"won\":true,\"keepPlaying\":true}");
  window.location.reload();
})();

anmonteiro

(ns express_sample
  (:require [cljs.nodejs :as node]))

(def express (node/require "express"))
(def app (. express (createServer)))

(defn -main [& args]
  (doto app
    (.use (. express (logger)))
    (.get "/" (fn [req res]

anmonteiro

var fib = (function() {
  var fibArr = [];

  var calcFib = function( n ) {
    return ( n <= 1 ? 1 : (fib( n - 1 ) + fib( n - 2 )));
  };

  return function( n ) {
  	if( !fibArr[ n ] ) {
  	  fibArr[ n ] = calcFib( n );

anmonteiro

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns                     on recent CPU
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 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 4X memory

anmonteiro

{% assign RELATED_POSTS_THRESHOLD = 3 %}

<ul>
  {% assign related_post_count = 0 %}
  {% for post in site.related_posts %}
    {% if related_post_count == RELATED_POSTS_THRESHOLD %}
      {% break %}
    {% endif %}
    {% for tag in post.tags %}
      {% if page.tags contains tag %}

anmonteiro

(defn parse-form [down-tok?, up-tok?, [tok & toks]]
  (loop [frm [tok], toks toks]
    (if-let [[tok2 & toks2] (seq toks)]
      (cond
        (down-tok? tok2) (let [[res toks3] (parse-form down-tok?, up-tok?, toks)]
                          (recur (conj frm res) toks3))
        (up-tok? tok2) [(conj frm tok2) toks2]
        :else         (recur (conj frm tok2) toks2))
      [frm nil])))

anmonteiro

(def app-state
    {:people [{:name "Alice" :age 31 :single false}
              {:name "Bob" :age 25 :single false}
              {:name "Carl" :age 20 :single true}]})

(defn read
  [{:keys [state]} k {:keys [length]}]
  {:value
    (take length
          (into []

anmonteiro

(defn view [opts & children]
  (apply js/React.createElement js/React.View (clj->js opts) children))

(defn text [opts & children]
  (apply js/React.createElement js/React.Text (clj->js opts) children))

(defn image [opts & children]
  (apply js/React.createElement js/React.Image (clj->js opts) children))

(defn navigator [opts & children]

anmonteiro

;; =============================================================================
;; Composite

(def composite-data
  {:composite/item {:id 0
                   :width 400
                   :height 400
                   :color "#428BCA"
                   :children [{:id 1
                               :width 200