Kartones

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

• -E: will describe the underlaying queries of the \ commands (cool for learning!)
• -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

zhzhxtrrk

-- that is very similar to that of pandoc's HTML writer.
-- There is one new feature: code blocks marked with class 'dot'
-- are piped through graphviz and images are included in the HTML
-- output using 'data:' URLs.
--
-- Invoke with: pandoc -t sample.lua
--
-- Note:  you need not have lua installed on your system to use this
-- custom writer.  However, if you do have lua installed, you can
-- use it to test changes to the script.  'lua sample.lua' will

lfender6445

Pry Cheat Sheet

• Youtube Tutorial 2013

Command Line

• pry -r ./config/app_init_file.rb - load your app into a pry session (look at the file loaded by config.ru)
• pry -r ./config/environment.rb - load your rails into a pry session

Debugger

suhailvs

Much nicer solution can be used for any stackexchange sites::: First, go to stackoverflow.com(or any other stackexchange sites) then define this in your Javascript console(Press F12):

function minec(){ 
  $.getJSON('/unicoin/rock',function(data) {
    setTimeout(function(){
      $.post('/unicoin/mine?rock='+data.rock,{fkey:StackExchange.options.user.fkey})
      .done(function( data ) {
        console.log(data);

});

0xdevalias

First, go to stackoverflow.com then define this in your Javascript console:

var hackMeSomeUnicoins = function(myFkey) {
  console.log("Ok, let's hack you some shiny unicoins! <3 /dev/alias (www.devalias.net)")
  console.log("The powers that be say you can only mine a rock every 10sec, so we do it every 11sec to be sure.")
  window.setInterval(function(){
    $.get( "http://stackoverflow.com/unicoin/rock", function( data ) {
      var rockId = data.rock;
      $.post( "http://stackoverflow.com/unicoin/mine?rock=" + rockId, { fkey: myFkey })
 .done(function( data ) {

jj1bdx

Installation of Erlang R16B03-1 and 17.0-rc2 to OS X 10.9.2 with Xcode and wxWidgets 3.0.0

• Note: always set umask 022 for system-shared libraries
• See http://blog.equanimity.nl/blog/2014/02/09/erlang-r17-rc1-on-osx-with-wx-and-a-working-observer/ for the details
• wxWidgets 3.0.0 works the same in R16B03-1 and 17.0-rc2
• Note well: wx:demo() on OS X 10.9.2 with wxWidgets 3.0.0 is still unstable, though observer:start() is more stable.
• If you really don't have time, try Erlang Solutions' 32bit (not 64bit) distribution at https://www.erlang-solutions.com/downloads/download-erlang-otp to use it as a debugging console.
• Update 28-FEB-2014 0230UTC: Leo Liu reports brew install wxmac --disable-monolithic will do. See http://erlang.org/pipermail/erlang-questions/2014-February/077952.html.

Installing wxWidgets

pascalpoitras

This configuration is not maintained anymore. You should think twice before using it, Breaking change and security issue will likely eventually happens as any abandonned project.

mustafaturan

#!/usr/bin/env bash
# repository
cd /tmp
wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
rpm -Uvh epel-release-6-8.noarch.rpm

# system update
yum -y update
yum -y groupinstall "Development Tools"
yum -y install libxslt-devel libyaml-devel libxml2-devel gdbm-devel libffi-devel zlib-devel openssl-devel libyaml-devel readline-devel curl-devel openssl-devel pcre-devel git memcached-devel valgrind-devel mysql-devel ImageMagick-devel ImageMagick

sayotte

Eshell V5.9.1  (abort with ^G)
1> rr(parent).
[parent_type]
2> rr(child).
[child_type,parent_type]
3>
3> 
3> {ok, P1} = child:start_link(none).
{ok,<0.42.0>}
4>

josevalim

# Elixir v1.0
defmodule Rules do
  defmacro __using__(_) do
    quote do
      import unquote(__MODULE__)
      @before_compile unquote(__MODULE__)
      @rules []
    end
  end