igrigorik

require 'rubygems'
require 'rack'

class Object
  def webapp
    class << self
       define_method :call do |env|
         func, *attrs = env['PATH_INFO'].split('/').reject(&:empty?)
         [200, {}, send(func, *attrs)]
       end

evnm

# Legitimately-useful utilities missing from OS X.
brew install wget watch gnu-sed coreutils

# Up-to-date versions of included tools.
brew install git emacs

# Just for fun.
brew install fortune cowsay

cscotta

cscotta@ordasity:~/Desktop$ scala -cp mongo-2.7.0.jar Repro.scala 
Inserting canary...
Inserting test data...
Paging through records...
Spotted the canary!
Updating canary object...
Spotted the canary!
Whoops, shipped the same order multiple times!

cscotta@ordasity:~/Desktop$

mrflip

Max Battery Life Checklist

Here is a checklist to follow if you want maximum battery life -- for instance if you're about to get on a long plane flight.

Low power use checklist

With power connected:

aphyr

  public final static RuntimeException ᚇ = new RuntimeException("┻━┻");

  public void ノಠ益ಠノ彡(RuntimeException t) { throw t; } 

  public void ノಠ益ಠノ彡(Throwable t) { throw new RuntimeException(t); } 

  public int hashCode() { 
    ノಠ益ಠノ彡(ᚇ);
    return 0;
  }

lukego

I use this data structure all the time. Can someone leave a comment and tell me what it's called?

1. insert(k,v): add a new value
2. lookup(k): lookup an existing value
3. age(): delete old entries (that have not been used since previous call to age())

# Initialize 'old' and 'new' to empty tables
local old, new = {}, {}

aphyr

aphyr@waterhouse:~/timelike master$ lein test timelike.node-test

lein test timelike.node-test
Even connections LB
Total reqs: 10000
Latency distribution:
Min:     0.017489419380090965
Median:  141.4027252436847
95th %:  612.7774737814785
99th %:  937.1806417316121

jdmaturen

On the relative value of startup stock

How do you compare the potential value of different stage companies? And as a company progresses what is the appropriate amount of stock to give new employees?

Using data from Crunchbase and Yahoo Finance we can calculate the average value created per company broken down by how much money they have raised. From this we can then compute relative returns at the different stages, e.g. $1M raised, $10M, $100M, etc.

tl;dr

For this exercise we'll calibrate relative to expected return from a company that's raised $1M.

cmeiklejohn

Think Distributed Systems Summer School
Providence, RI
Curriculum

Friday (night session, open discussion)

* Background, introductions
* What are you working on in distributed systems?
* Lightning talks on research or open problems

Wilto

Let’s leave aside, for now, the fact that you’ve changed web standards. You’ve been a participant in the first time—in the history of the web, far as I know—that the web development community has taken a feature from an initial proposal to the funding of an honest-to-God native implementation.

Instead, I want you to focus on this: say only ten developers use a native responsive images solution to reduce the weight of just one page apeice by only 500kb, and each of those pages has a barely-significant 5,000 hits per month: those users have been saved almost 24GB of data. A thousand pages saving 500kb apeice, and we’ve saved users an entire terabyte in a month. Now expand that to the entire industry: every web developer; every hit on every page that would otherwise carry with it a huge, wasteful image request, saving megabytes at a time. To those users, the only change is that the web is faster, less expensive, more accessible. For those users, the web is just better.

In helping make the picture element