micrub

# referecing: # https://www.digitalocean.com/community/tutorials/how-to-install-apache-kafka-on-ubuntu-14-04 # https://chongyaorobin.wordpress.com/2015/07/08/step-by-step-of-install-apache-kafka-on-ubuntu-standalone-mode/

1. Add 'kafka' user:

$ sudo useradd kafka -m

2. Install Java:

micrub

The right way

if [ -z ${var+x} ]; then echo "var is unset"; else echo "var is set to '$var'"; fi

where ${var+x} is a [parameter expansion][1] which evaluates to nothing if var is unset, and substitutes the string x otherwise.

Quotes Digression

Quotes can be omitted (so we can say ${var+x} instead of "${var+x}") because this syntax & usage guarantees this will only expand to something that does not require quotes (since it either expands to x (which contains no word breaks so it needs no quotes), or to nothing (which results in [ -z ], which conveniently evaluates to the same value (true) that [ -z "" ] does as well)).

micrub

Pre-requisite: go to http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html download http://the.earth.li/~sgtatham/putty/latest/x86/putty.exe and http://the.earth.li/~sgtatham/putty/latest/x86/puttygen.exe

Run puttygen and generate the key

1. Click 'Generate' move the mouse around as instructed and wait

micrub

Install neovim in ubuntu 14.04

sudo add-apt-repository ppa:neovim-ppa/unstable 
sudo apt-get update
sudo apt-get install neovim

Using terminal mode

1. Enter terminal mode

micrub

Manual installation

Tried following which broke python:

pact install python-setuptools python-ming
pact install libxml2-devel libxslt-devel libyaml-devel
curl -skS https://bootstrap.pypa.io/get-pip.py | python

micrub

Overview

1. Create RAM disk
2. Create JAVA + Leiningen squashfs image
3. Mount Image to RAM disk and set it as permanent
4. Set Java on RAM disk to be default and patch lein executable to read standalone jar from RAM disk.

Create RAM disk

Create RAM disk using tmpfs:

micrub

xmonad default key bindings

Action key bindings

Key binding	Action
mod - shift - slash	Run xmessage with a summary of the default keybindings (useful for beginners)
mod - shift - return	Launch terminal
mod - p	Launch dmenu
mod - shift - p	Launch gmrun

micrub

Here are a list of headless browsers that I know about:

• [HtmlUnit][1] - Java. Custom browser engine. JavaScript support/DOM emulated. Open source.
• [Ghost][2] - Python only. WebKit-based. Full JavaScript support. Open source.
• [Twill][3] - Python/command line. Custom browser engine. No JavaScript. Open source.
• [PhantomJS][4] - Command line/all platforms. WebKit-based. Full JavaScript support. Open source.
• [Awesomium][5] - C++/.Net/all platforms. Chromium-based. Full JavaScript support. Commercial/free.
• [SimpleBrowser][6] - .Net 4/C#. Custom browser engine. No JavaScript support. Open source.
• [ZombieJS][7] - Node.js. Custom browser engine. JavaScript support/emulated DOM. Open source.
• [EnvJS][8] - JavaScript via Java/Rhino. Custom browser engine. JavaScript support/emulated DOM. Open source.

micrub

ctags

Add the following to ~/.ctags (thanks, xzj / clojure.ctags):

--langdef=Clojure
--langmap=Clojure:.clj
--langmap=Clojure:+.cljx
--langmap=Clojure:+.cljs
--regex-clojure=/\([ \t]*create-ns[ \t]+([-[:alnum:]*+!_:\/.?]+)/\1/n,namespace/
--regex-clojure=/\([ \t]*def[ \t]+([-[:alnum:]*+!_:\/.?]+)/\1/d,definition/

micrub

(def jquery (js* "$"))

(defn show [msg]
  (let [data-as-json ((js* "JSON.stringify") msg nil 4)]
    ((js* "alert") data-as-json)))

(defn make-js-map
  "makes a javascript map from a clojure one"
  [cljmap]
  (let [out (js-obj)]