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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

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Problem

In Arch Linux mkinitcpio -p linux

shows

Possibly missing firmware for module: aic94xx
 Possibly missing firmware for module: wd719x

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function dedent(callSite, ...args) {

    function format(str) {

        let size = -1;

        return str.replace(/\n(\s+)/g, (m, m1) => {

            if (size < 0)
                size = m1.replace(/\t/g, "    ").length;

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module.exports = {
  config: {
    // default font size in pixels for all tabs
    fontSize: 12,

    // font family with optional fallbacks
    fontFamily: 'Menlo, "DejaVu Sans Mono", Consolas, "Lucida Console", monospace',

    // terminal cursor background color and opacity (hex, rgb, hsl, hsv, hwb or cmyk)
    cursorColor: 'rgba(248,28,229,0.8)',

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<View style={{ justifyContent: 'center', alignItems: 'center', flexDirection: 'row', flex: 1}}>
  <View>
    <Text>Left</Text>
  </View>
  <View>
    <Text>Right</Text>
  </View>
</View>

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First step: Install Android SDK

1. yaourt -S android-sdk android-sdk-platform-tools android-sdk-build-tools
   Note: Maybe you'll have problems with the lasta package: ncurses5-compat-libs. In order to avoid this problem you have to use this command: gpg --recv-keys F7E48EDB. You can find clarification (here)[https://aur.archlinux.org/packages/ncurses5-compat-libs/?comments=all].
2. yaourt -S genymotion
   Note: You'll need install virtual-box and his modules, yaourt will make for you but you need choos between ArchLinux host modules or DKMS host modules.
3. echo -e "vboxdrv\nvboxnetflt\nvboxnetadp\nvboxpci" > /etc/modules-load.d/virtualbox.conf
   Note: You need do this with super user because need super user permissions and with sudo, for us at least, doesn't work.
4. sudo modprobe vboxdrv vboxnetadp vboxnetflt
   Activate for current session.
5. sudo chmod -R 777 /opt/android-sdk

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// === Arrays

var [a, b] = [1, 2];
console.log(a, b);
//=> 1 2


// Use from functions, only select from pattern
var foo = () => [1, 2, 3];

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The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

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Deverus Vue.js Style Guide

Guide for developing Vue.js applications.

v. 0.0.1

Vue.js is an amazing framework, which can be as powerful as Angular or React, the two big heavy hitters in the world of front-end frameworks.

However, most of Vue's ease-of-use is due to the use of Observables - a pattern that triggers re-renders and other function calls with the reassignment of a variable.

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#
# CORS header support
#
# One way to use this is by placing it into a file called "cors_support"
# under your Nginx configuration directory and placing the following
# statement inside your **location** block(s):
#
#   include cors_support;
#
# As of Nginx 1.7.5, add_header supports an "always" parameter which