jberkus

WITH table_scans as (
    SELECT relid,
        tables.idx_scan + tables.seq_scan as all_scans,
        ( tables.n_tup_ins + tables.n_tup_upd + tables.n_tup_del ) as writes,
                pg_relation_size(relid) as table_size
        FROM pg_stat_user_tables as tables
),
all_writes as (
    SELECT sum(writes) as total_writes
    FROM table_scans

dypsilon

Backend Development

• node.js
  • Installation paths: use one of these techniques to install node and npm without having to sudo.
  • Node.js HOWTO: Install Node+NPM as user (not root) under Unix OSes
  • Felix's Node.js Guide
  • Creating a REST API using Node.js, Express, and MongoDB
  • Node Cellar Sample Application with Backbone.js, Twitter Bootstrap, Node.js, Express, and MongoDB
  • JavaScript Event Loop
• Node.js for PHP programmers

dypsilon

Frontend Development

Attention: the list was moved to

https://github.com/dypsilon/frontend-dev-bookmarks

This page is not maintained anymore, please update your bookmarks.

---

jnicklas

Capybara.add_selector :record do
  xpath { |record| XPath.css("#" + ActionController::RecordIdentifier.dom_id(record)) }
  match { |record| record.is_a?(ActiveRecord::Base) }
end

plu

Install OpenStack on a Hetzner VQ7 server

Reinstall Ubuntu

0. Boot the server into the 64bit Linux rescue system
1. Run installimage
2. Select Ubuntu 11.10 (oneiric) 64bit
3. In the editor, where you have to set the disk partition sizes, search for following lines and remove them. The actual lines may vary if Hetzner changes anything.

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

jonavon

<?php
/**
 * CIDR.php
 *
 * Utility Functions for IPv4 ip addresses. 
 * Supports PHP 5.3+ (32 & 64 bit)
 * @author Jonavon Wilcox <jowilcox@vt.edu>
 * @revision Carlos Guimarães <cvsguimaraes@gmail.com>
 * @version Wed Mar  12 13:00:00 EDT 2014
  */

sandinist

-If you're using a Mac terminal, take a look at [this article](http://www.21croissants.com/howto/fix-forward-delete-key-on-snow-leopard-for-irb).
+#### iTerm2
+	
+* Go to iTerm > Preferences... > Keys
+* Add a Global Shortcut Key
+* Type the `delete` key as Shortcut
+* Select Send Hex Codes as Action and type 0x004
+* Click on `OK` and you're good to go
+
+#### iTerm	

mikhailov

# NOTICE: to get Nginx+Unicorn best-practices configuration see the gist https://gist.github.com/3052776

  $ cd /usr/src
  $ wget http://nginx.org/download/nginx-1.2.1.tar.gz
  $ tar xzvf ./nginx-1.2.1.tar.gz && rm -f ./nginx-1.2.1.tar.gz

  $ wget ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-8.30.tar.gz
  $ tar xzvf pcre-8.30.tar.gz && rm -f ./pcre-8.30.tar.gz

  $ wget http://www.openssl.org/source/openssl-1.0.1c.tar.gz

nsdevaraj

package
{
        import flash.display.Loader;
        import flash.net.URLRequest;
        import flash.net.URLStream;
        import flash.events.IOErrorEvent;
        import flash.events.SecurityErrorEvent;
        import flash.events.Event;
        import flash.utils.ByteArray;
        import flash.utils.Endian;