nateware

# Create vagrant image
vagrant init ubuntu12_64 http://files.vagrantup.com/precise64.box
vagrant up
vagrant ssh

# Fork aws/opsworks-cookbooks on github
# https://github.com/aws/opsworks-cookbooks
# Clone locally
git clone git@github.com:yourusername/opsworks-cookbooks.git
cd opsworks-cookbooks

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
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 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

fogus

class Lisp
  def initialize
    @env = { 
      :label => lambda { |(name,val), _| @env[name] = val },
      :quote => lambda { |sexpr, _| sexpr[0] },
      :car   => lambda { |(list), _| list[0] },
      :cdr   => lambda { |(list), _| list.drop 1 },
      :cons  => lambda { |(e,cell), _| [e] + cell },
      :eq    => lambda { |(l,r), _| l == r },
      :if    => lambda { |(cond, thn, els), ctx| eval(cond, ctx) ? eval(thn, ctx) : eval(els, ctx) },

phpdude

        location /resize {
                alias /tmp/nginx/resize;
                set $width 150;
                set $height 100;
                set $dimens "";

                if ($uri ~* "^/resize_(\d+)x(\d+)/(.*)" ) {
                        set $width  $1;
                        set $height $2;
                        set $image_path $3;

esperlu

#!/bin/sh

# Converts a mysqldump file into a Sqlite 3 compatible file. It also extracts the MySQL `KEY xxxxx` from the
# CREATE block and create them in separate commands _after_ all the INSERTs.

# Awk is choosen because it's fast and portable. You can use gawk, original awk or even the lightning fast mawk.
# The mysqldump file is traversed only once.

# Usage: $ ./mysql2sqlite mysqldump-opts db-name | sqlite3 database.sqlite
# Example: $ ./mysql2sqlite --no-data -u root -pMySecretPassWord myDbase | sqlite3 database.sqlite

joshwand

ganked from unreadable scribd doc here: http://cleancoder.posterous.com/what-killed-waterfall-could-kill-agile

What Killed Waterfall could Kill Agile.

Robert C. Martin
20 Nov, 2010

In 1970 a software engineer named Dr. Winston W. Royce wrote a seminal paper entitled Managing the Development of Large Software Systems. This paper described the software process that Royce felt was appropriate for large-scale systems. As a designer for the Aerospace industry, he was uniquely qualified.

He began the paper by setting up a straw-man process to knock down. He described this naïve process as “grandiose”. He depicted it with a simple diagram on an early page of his paper. Then the paper methodically tears this “grandiose” process apart. In the end, Royce proposed a far more nuanced and insightful approach, leaving the reader to giggle at the silliness of the “grandiose” model.

endolith

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