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Are you really interested in learning how to Write a Search Engine from Scratch? Click this link and register your interest for my book about how to do so. This is part 2 of a 5 part series. Part 1 – Part 2 – Part 3 – Part 4 – Part 5 – Downloads/Code The first implementation has a few issues that are pretty apparent. Chiefly is performance. Secondly it stores the index in a single folder which is loosely related to the fi..
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Are you really interested in learning how to Write a Search Engine from Scratch? Click this link and register your interest for my book about how to do so.][1] This is part 1 of a 5 part series. [Part 1][2] – [Part 2][3] – [Part 3][4] – [Part 4][5] – [Part 5][6] – [Downloads/Code][7] I imagine that if you have landed on this page you probably have an interest in search and search engines. Not only that, you have probably read the foll..
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A story of a game exploit Once upon a time I developed a somewhat popular web game called Forumwarz . At its peak, we were serving about 6 million dynamic requests a day off a single quad-core server. Forumwarz limits how many turns a player can take in a day. We designed it this way so that the competitive aspect of the game wasn’t simply a contest of who had the most time available to play. Players had to choose their targets wisely.
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And so commences the first Tea and Stuff meeting of 2013! It did begin rather late, as not all were present until 5:30. While waiting for all members to turn up, we cleared space for a recently acquired beer home brewing kit. Though we could not commence the beer brewing, as a few additional items are still required (e.g. brewing sugar). There is now room in the cupboard under the stairs for the fermenting pot thing, but in order to make ..
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And so commences the first Tea and Stuff meeting of 2013! It did begin rather late, as not all were present until 5:30. While waiting for all members to turn up, we cleared space for a recently acquired beer home brewing kit. Though we could not commence the beer brewing, as a few additional items are still required (e.g. brewing sugar). There is now room in the cupboard under the stairs for the fermenting pot thing, but in order to make ..
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I am sure you have heard about the javascript Promises Pattern, but if you haven’t, here is a quick and simple definition: a promise or future is an object that represents a future result, not yet obtained or calculated ( here you have a more complete definition). In fact, what is really nice about it is that allows you to define callbacks for async code in and more elegant and readable way. But wait a moment, what’s the problem with the....
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Lo scorso anno abbiamo lavorato duro per costruirci una RESTful Web API su misura, flessibile e completa. In corso d’opera abbiamo imparato molto sulle migliori pratiche REST, mettendo anche alla frusta le rinomate capacità Web del linguaggio Python. Ad EuroPython 2012 ho poi raccontato la nostra esperienza e condiviso ciò che avevamo imparato. In quell’occasione mi sono reso conto di quanto l’argomento fosse d’attualità, tanto che da q..
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We developed a cool algorithm to add informational trailer texts to SMS at Uboot. It was online from mid 2000 to mid 2011 (when Uboot stopped doing SMS). I developed this algorithm together with my colleague Mike. So that it doesn't get lost forever, here is a description of it :-) The general situation was this: The users may send SMS from Uboot to phones SMS have fixed length (e.g. single part SMS contains 160 characters) Th..
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ownCloud + DreamHost: Your own Unlimited DropBox for 13$/mo
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www.evantahler.com
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13 years ago
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eng
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A long time ago, I saw this in the Hak5 store . After reading about it in mossmann's blog , I found somewhat interesting that using this easily built device you can HACK THE PLANET . An ethernet tap is a passive device used to monitor traffic between two hosts using a third one. For more info on network taps read here .
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With this post I thought I would try something different: rather than writing a full-fledged post for each of the myriad notes I have created over the past months in Simplenote, I will begin posting whatever I have collected for the potential topic as I would a linked item: with the excerpt as a blockquote along with some commentary if I deem it necessary. With that, then, the first post taken straight from my notepad, in which I attempt to..
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I just got internet back after being without it since before Christmas. It was a tearful reunion, to be sure. Turns out, I was actually more productive than usual without internet. There's a one-word explanation for that, and it rhymes with "edit". ANYway, here's what got done: Analytics When you finish a play session, you'll see something like this: I haven't figured out the server side of this system yet, but all it really ..
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It is now 2013, and the IKS project , started back in 2009 to improve content management systems through semantic technologies, has ended. Alongside Apache Stanbol and VIE.js , the Create.js inline editing toolkit was one of the major outcomes of this European Union funded effort. This post outlines the current state of Create, and some of the things that will be happening around it in 2013. Increased CMS adoption Thanks to bein....
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Turbolinks Turbolinks is a new Ruby library, enabled in Rails 4 by default, that is designed to speed up your web applications. It does this by binding a Javascript handler to all link clicks. Instead of allowing the browser to load the new page, it fetches it in the background via AJAX. It then parses out the body, and injects it into the document you’re currently viewing. The main advantage of Turbolinks is that your static assets ..
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Well, how nice! Look what the UPS man hid behind my garbage can (seriously… the thing was all damp; it must have been sitting out there for two weeks). That’s pretty nice of them! It even included a note: The one strange thing is that while it’s marked for Project Sputnik (which uses a Dell XPS 13), I’m not sure I would feel comfortable carrying such a small computer with it.
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It is now 2013, and the IKS project , started back in 2009 to improve content management systems through semantic technologies, has ended. Alongside Apache Stanbol and VIE.js , the Create.js inline editing toolkit was one of the major outcomes of this European Union funded effort. This post outlines the current state of Create, and some of the things that will be happening around it in 2013. Increased CMS adoption Thanks to bein....
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It is now 2013, and the IKS project , started back in 2009 to improve content management systems through semantic technologies, has ended. Alongside Apache Stanbol and VIE.js , the Create.js inline editing toolkit was one of the major outcomes of this European Union funded effort. This post outlines the current state of Create, and some of the things that will be happening around it in 2013. Increased CMS adoption Thanks to bein....
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It is now 2013, and the IKS project , started back in 2009 to improve content management systems through semantic technologies, has ended. Alongside Apache Stanbol and VIE.js , the Create.js inline editing toolkit was one of the major outcomes of this European Union funded effort. This post outlines the current state of Create, and some of the things that will be happening around it in 2013. Increased CMS adoption Thanks to bein....
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Over the course of the last few days I have begun developing a new app to replace Hacker News Story Pickup Rate , a site that aims to take the guesswork out of submitting stories to Hacker News by using various heuristics to determine the best time to submit a story in order to gain the most attention. Partway through last week Hacker News Story Pickup Rate went down, and as of January 1st it had not gone back online. Permalink.
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If you log into your Raspberry Pi using ssh it will prompt you for a password. Having to do this multiple times a days this is very annoying. To ease the pain, and enhance security, you can use public key authentication instead. Therefor you create a pair of keys on your client, and store the public key on your Raspberry Pi. Then you set up an authentication by key. Afterwards the user can login into the Raspberry Pi using his private key.
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During my flight earlier this afternoon I started writing an article tentatively titled “I Should Blog Full Time, But I Can’t”, the first two paragraphs of which I have included below: Permalink.
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It is a wonder that we have yet to officially write about probability theory on this blog. Probability theory underlies a huge portion of artificial intelligence, machine learning, and statistics, and a number of our future posts will rely on the ideas and terminology we lay out in this post. Our first formal theory of machine learning will be deeply ingrained in probability theory, we will derive and analyze probabilistic learning algorith..
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It is a wonder that we have yet to officially write about probability theory on this blog. Probability theory underlies a huge portion of artificial intelligence, machine learning, and statistics, and a number of our future posts will rely on the ideas and terminology we lay out in this post. Our first formal theory of machine learning will be deeply ingrained in probability theory, we will derive and analyze probabilistic learning algorith..
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It is a wonder that we have yet to officially write about probability theory on this blog. Probability theory underlies a huge portion of artificial intelligence, machine learning, and statistics, and a number of our future posts will rely on the ideas and terminology we lay out in this post. Our first formal theory of machine learning will be deeply ingrained in probability theory, we will derive and analyze probabilistic learning algorith..
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I've heard the phrase "Let's rewrite this in Java!" uttered in various meetings at various companies at various times in my career. Often by managers. All such projects to completely re-write the company's software in a new language or framework inevitably end in disaster. Why is this? I must confess I don't really know. I suppose it doesn’t have to be Java, although it often is. Java is the classic. For example, a big company comes alo..
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This could be a post detailing how to host clustered virtual machines with rgmanager and clusvcadm, but that is a longer story and there is much work to do. For now, I will give you a short version including an informative “gotcha”. With my cluster up and running, I added a virtual machine entry to my cluster.conf :
This could be a post detailing how to host clustered virtual machines with rgmanager and clusvcadm, but that is a longer story and there is much work to do. For now, I will give you a short version including an informative “gotcha”. With my cluster up and running, I added a virtual machine entry to my cluster.conf :
One often needs to send users email notifications. Ideally these should have the following capabilities: Text is stored in separate files (not strings in the source code) Localizable into different languages Variables (“Hello Adrian!”) Attachments (e.g. PDF invoices) HTML (for styling) Plain text alternative version Inline images (e.g. company logo) Variables displayed properly in HTML mails (escaping of “&” etc.) Variables which are embe..
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Recently, I wrote a short essay on privilege and programming . It was quite popular on /r/programming and generated hundreds of comments, both there and on this blog. I was surprised and flattered to see the majority of the comments agreed with my post, however a few people brought up a concern which I’d like to address: Why this is person trying to convince me that I should regretful for being able to use a computer at a young age..
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It happened when Steve Jobs introduced the iPhone, and it happened again when he introduced the iPad: a new player entered a market stagnated by incumbents and surprised everyone by tossing the norm out the window and ushering in a new era through the door. On a much smaller scale this happened earlier last week when I stumbled across Cyloramic , a neat little iOS app for the iPhone 5 that uses vibration patterns to spin the phone in a ful..
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If you store your users' ages in the database, in one year's time their ages will be wrong. If you store your users' birth dates in the database, and calculate their age from that, this age will always be correct. Some sites wish to ask the user their age and display it. It would seem simplest to just store this number in an integer field alongside the user in the database. But you can be sure that, in one year, this value will be wrong.
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31 de Diciembre, otro año más. Y uno nuevo a punto de llegar. En mi caso es fácil resumir 2012 en un par de palabras: cambio y aprendizaje . Ha sido un año en el que profesionalmente he tomado un cambio de dirección y del cual estoy realmente satisfecho, aunque en su momento fue una decisión díficil, sobre todo por el momento de crisis en el que nos encontramos. Y es que este cambio me ha hecho aprender. Mucho. Ha sido el año en el q....
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