Jan 20, 2014

Speaking engagements for spring 2014

Here are the confirmed engagements for spring 2014. I'm honored to be invited to travel to Asia, in China and Japan. Excellent! 25-27 April - QCon Beijing 2014 - Beijing, China 30 April - QCon Tokyo 2014 - Tokyo, Japan 21 May - DevSum 2014 - Stockholm, Sweden 22 May - InfoShare 2014 - Gdansk, Poland

Jan 14, 2014

Keynoting Community Days 2014

I have been invited to offer a keynote at Community Days 2014 in Milan. I will be giving an Italian version of the Architecture of Stack Overflow talk: Come funziona Stack Overflow: dall'architettura server ai tool di sviluppo This will be held Wednesday 26 February 2014 at 10:00 / 11:00 at Microsoft Italia - Via Lombardia 2/a-1, 20068 Peschiera Borromeo (MI) More info on the official site, including a something for your calendar.

Oct 02, 2013

New speaking engagement: Hacker News London on October 23rd

I am honored to announce that I will be speaking at the Hacker News London meet up. My updated speaking agenda: September 20th — The Architecture of Stack Overflow at DevDay 2013, Krakow, Poland Oct 23rd — Architecture of Stack Overflow -- the TL;DR at Hacker News London, London,United Kingdom October 28th — The Architecture of Stack Overflow at WebTechCon/International PHP Day 2013, München, Germany October 28th — Lean Engineering at Stack Exchange at WebTechCon/International PHP Day 2013, Münc…

Sep 13, 2013

New speaking engagement: Developer Conference 2013

I am happy to announce that I've been asked to give a talk about the Architecture of Stack Overflow at Developer Confererence 2013. My speaking agenda therefore looks as follows: September 20th — The Architecture of Stack Overflow at DevDay 2013, Krakow, Poland October 28th — The Architecture of Stack Overflow at WebTechCon/International PHP Day 2013, München, Germany October 28th — Lean Engineering at Stack Exchange at WebTechCon/International PHP Day 2013, München, Germany Nov 7th — The Archit…

Jul 22, 2013

Speaking in Krakow and Munchen

I'm proud to announce a double speaking engagement this fall. DevDay 2013 20/09/2013, Kraków (Poland) I will be speaking about the Architecture of Stack Overflow. WebTech Conference 2013 27–30/10/2013 München (Germany) I will be giving two talks, one about the Architecture of Stack Overflow and the other about Lean engineering at Stack Exchange. Architecture of Stack Overflow The Stack Exchange network is a huge success story which now counts more than a hundred sites, millions of users and half…

Jun 26, 2013

Answer for "Christmas visit nightmare"

TL;DR: Not only I did get an answer by an egregious reader (hi Emmet!), but it was a really good one. The way to solve the problem is to use an algorithm known as "earliest deadline first": you sort by ascending end date and then proceed in order, excluding the family members that overlap. Demonstration It's fairly easy to convince ourselves that it returns a optimal solution by following this line of reasoning. Sort the dates as specified above pick the first element Get all the visits that ove…

Jun 15, 2013

Hacking Challenge: Christmas visits nightmare!

I originally wrote this challenge in 2012 to select a few developers for my previous company. They turned it down! I still think it's a nice puzzle. I would like to publish more in the future, let's see how this goes. Instructions Subsitute //Write code here... with your awesome solution. Feel happy. If you want me to look at it, your answer to sk...@stackoverflow.com (if you can't guess the email, there's a captcha waiting for you as a punishment). If you don't want me to look at it, that's ok,…

Jun 07, 2013

How to use Forms-Based Authentication with MVC4

I am putting this down just to remind myself in the future, since the documentation I've found on-line is very lacking. To add extra context: you don't need anything else to use forms-based authentication. Most of the documentation you will find on-line will advise you to use some MembershipProvider. You don't need it, and here's how it's done. What does Forms-Based Authentication do? Forms-Based Authentication does a few related things. It writes a cookie which identifies you as, well, yourself…

May 29, 2013

LX week

I was in Lisbon this week visiting old friends. In exchange for a desk and WI-FI — and potentially some yummy pizza — I have been giving quick talks about the high level architecture of the Stack Exchange network and about our development philosophy: we like fast, really fast code! The talks were followed by Q&A sessions where I tried to answer the most common questions on Stack Overflow. After all, I do make Q&A for a living... Here's some of the coolest questions that I've been asked: How do y…