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Just over a week ago we had our first internal hackathon at SoundCloud. You can read (and listen!) about it on our community blog or read…
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This is a story of how we adapted our architecture over time to accomodate growth. Scaling is a luxury problem and surprisingly has more to…
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Just over a week ago we had our first internal hackathon at SoundCloud. You can read (and listen!) about it on our community blog or read…
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This is a story of how we adapted our architecture over time to accomodate growth. Scaling is a luxury problem and surprisingly has more to…
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JSBooks Free JavaScript Books è una valida selezione di risorse gratuite su JavaScript. Si tratta di libri e guide gratuite per programmatori di ogni livello, dal principiante al veterano. Il catalogo include titoli su jQuery, Backbone, design patterns, Node, CoffeeScript, qualcosa su HTML5 e addirittura un libro su MongoDB (si tratta una mia vecchia conoscenza ). Alcuni suggerimenti sono davvero di ottima qualità. Il progetto è open sourc..
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JSBooks Free JavaScript Books è una valida selezione di risorse gratuite su JavaScript. Si tratta di libri e guide gratuite per programmatori di ogni livello, dal principiante al veterano. Il catalogo include titoli su jQuery, Backbone, design patterns, Node, CoffeeScript, qualcosa su HTML5 e addirittura un libro su MongoDB (si tratta una mia vecchia conoscenza ). Alcuni suggerimenti sono davvero di ottima qualità. Il progetto è open sourc..
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12 - Implementing Continuous Delivery While keeping software production ready throughout its lifecycle and optimizing your delivery process for shorter cycle times might seem like a good idea to you, your colleagues might not share your excitement. In this webinar, Jez Humble discusses ways of implementing continuous delivery, and shares stories from companies who have successfully worked to improve their capability in continuous delivery.
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I served as lead developer on this award-winning crowdsourcing platform at the University of Iowa Libraries. The code has been made freely available on Github and has been used by over 20 research libraries and archives around the world, including Yale University, Oxford University Museum of Natural History, The Newberry Library, University College Dublin Archives, […]
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I have been watching a lot of video conferences on security and I'm wondering what will happen in the next couple of years.
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Prefix notation I’m a big fan of the prefix notation. It makes everything appear the same (if-statements, function calls , etc). I like how it removes the need for operator precedence rules. All the parentheses Once you get into learning Clojure and you have written a small application, you don’t really see the parens anymore. Sure, sometimes you still get the Unbalanced parens error but those are easy to spot. If you are afraid of....
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Prefix notation I’m a big fan of the prefix notation. It makes everything appear the same (if-statements, function calls , etc). I like how it removes the need for operator precedence rules. All the parentheses Once you get into learning Clojure and you have written a small application, you don’t really see the parens anymore. Sure, sometimes you still get the Unbalanced parens error but those are easy to spot. If you are afraid of....
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The Recipe for Classification One important task in machine learning is to classify data into one of a fixed number of classes. For instance, one might want to discriminate between useful email and unsolicited spam. Or one might wish to determine the species of a beetle based on its physical attributes, such as weight, color, and mandible length. These “attributes” are often called “features” in the world of machine learning, and they often..
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The Recipe for Classification One important task in machine learning is to classify data into one of a fixed number of classes. For instance, one might want to discriminate between useful email and unsolicited spam. Or one might wish to determine the species of a beetle based on its physical attributes, such as weight, color, and mandible length. These “attributes” are often called “features” in the world of machine learning, and they often..
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The Recipe for Classification One important task in machine learning is to classify data into one of a fixed number of classes. For instance, one might want to discriminate between useful email and unsolicited spam. Or one might wish to determine the species of a beetle based on its physical attributes, such as weight, color, and mandible length. These “attributes” are often called “features” in the world of machine learning, and they often..
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The Blessing of Distance We have often mentioned the idea of a “metric” on this blog, and we briefly described a formal definition for it. Colloquially, a metric is simply the mathematical notion of a distance function, with certain well-behaved properties. Since we’re now starting to cover a few more metrics (and things which are distinctly not metrics) in the context of machine learning algorithms, we find it pertinent to lay out the defi..
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The Blessing of Distance We have often mentioned the idea of a “metric” on this blog, and we briefly described a formal definition for it. Colloquially, a metric is simply the mathematical notion of a distance function, with certain well-behaved properties. Since we’re now starting to cover a few more metrics (and things which are distinctly not metrics) in the context of machine learning algorithms, we find it pertinent to lay out the defi..
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The Blessing of Distance We have often mentioned the idea of a “metric” on this blog, and we briefly described a formal definition for it. Colloquially, a metric is simply the mathematical notion of a distance function, with certain well-behaved properties. Since we’re now starting to cover a few more metrics (and things which are distinctly not metrics) in the context of machine learning algorithms, we find it pertinent to lay out the defi..
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I like the idea of Android home screen widgets. I like to visualize information, to get it quickly and perform common tasks in a single tap. Even though Android market is flooded with useful and not-so-useful widgets of any type and price, I was looking for a geeky way to make my own widgets. why? Normally, I need either very simple widgets (like clock, calendar, weather, battery level) or very specific ones (say, a calendar that draws a da..
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What did you actually learn in college? I’m not talking about what you learned while you were there, but what you learned in the part that you paid for – the…
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I like the idea of Android home screen widgets. I like to visualize information, to get it quickly and perform common tasks in a single tap. Even though Android market is flooded with useful and not-so-useful widgets of any type and price, I was looking for a geeky way to make my own widgets. why? Normally, I need either very simple widgets (like clock, calendar, weather, battery level) or very specific ones (say, a calendar that draws a da..
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How to avoid cluster race conditions or: How to implement a distributed lock manager in puppet
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purpleidea.com
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14 years ago
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eng
I’ve been working on a puppet module for gluster. Both this, my puppet-gfs2 module, and other puppet clustering modules all share a common problem: How does one make sure that only certain operations happen on one node at a time? The inelegant solutions are simple: Specify manually (in puppet) which node the "master" is, and have it carry out all the special operations. Downside: Single point of failure for your distributed cluster, a....
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How to avoid cluster race conditions or: How to implement a distributed lock manager in puppet
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purpleidea.com
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14 years ago
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eng
I’ve been working on a puppet module for gluster. Both this, my puppet-gfs2 module, and other puppet clustering modules all share a common problem: How does one make sure that only certain operations happen on one node at a time? The inelegant solutions are simple: Specify manually (in puppet) which node the "master" is, and have it carry out all the special operations. Downside: Single point of failure for your distributed cluster, a....
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I made a Twitter logo in HTML5. It's like the ugly brother of the actual Twitter logo
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liza.io
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14 years ago
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eng
My entry for the js13kgames challenge was cutting it too close to 13kb and I needed more room, so I decided to cut out the one image that I had - the Twitter logo for the sharing link at the Game Over screen.
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Working on a class in our application, I discovered that it was being included before a number of constants it used for its members were even defined. Puzzled on how this had never been a problem I started to experiment; echoing the member at the bottom of the class file after the class closed showed the expected CONSTANT_NAME. I was very confused at runtime the value of the member in the constructor and elsewhere in the class appeared co....
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Working on a class in our application, I discovered that it was being included before a number of constants it used for its members were even defined. Puzzled on how this had never been a problem I started to experiment; echoing the member at the bottom of the class file after the class closed showed the expected CONSTANT_NAME. I was very confused at runtime the value of the member in the constructor and elsewhere in the class appeared co....
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Continuous Delivery with Maven and Go into Maven Central
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www.thoughtworks.com
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14 years ago
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eng
In continuous delivery the idea is to have the capability to release the software to production at the press of a button, as often as it makes sense from a business point of view, even on every commit (which would then be called continuous deployment). This means that every binary built could potentially be released to production in a matter of minutes or seconds, if the powers that be so wish.
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Postgres out of the box has an abundance of datatypes, from standard numeric datatypes to geometric or even network datatypes . With extensions you can get even more out of it as earlier discussed with hStore . Though with all of the datatypes its easy to miss out on some of them that are there, in fact one of my favorites is often missed entirely. The Array datatype lets you do just as you’d expect, store an array inside Postgres. ....
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Postgres out of the box has an abundance of datatypes, from standard numeric datatypes to geometric or even network datatypes . With extensions you can get even more out of it as earlier discussed with hStore . Though with all of the datatypes its easy to miss out on some of them that are there, in fact one of my favorites is often missed entirely. The Array datatype lets you do just as you’d expect, store an array inside Postgres. ....
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Webinar with Jim Highsmith and Suzie Prince The Agile scaling myth goes something like this: “Agile development works well for smaller projects, but doesn’t scale to larger ones.” Which raises questions like: “At what size does delivering value to customers fail to be important?” and “Can large organizations afford to be inflexible, rigid, and unresponsive?”
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Non fare lo stronzo Codice semplice è difficile da scrivere Codice squisitamente semplice è davvero difficile da scrivere Se è semplice leggerlo non vuol dire che sia stato semplice scriverlo In effetti più è semplice più, probabilmente, è stato difficile scriverlo Ci sono molti modi di ottenere lo stesso risultato E’ davvero improbabile che il primo che ti viene in mente sia anche il migliore Probabilmente il migliore non esiste – n....
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Just over a year ago, Pearson, who published Continuous Delivery, approached Martin Fowler and I with a proposal to do a series of videos on the topic of continuous delivery. We filmed a bunch of material for these videos, but then both Martin and then I dropped out of the project due to other commitments.
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In my applications any personal data collected is not intentionally sold or shared to any third parties. Apparently the above wasn’t complete enough. Please see below. Your privacy is important to GripDev. This privacy statement provides information about the personal information that GripDev collects, and the ways in which GripDev uses that personal information. Personal information collection GripDev may collect and use the follow..
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കഴിഞ്ഞ മൂന്നു വര്ഷങ്ങളില് എണ്ണം 80-ശതമാനത്തിലധികം കുറഞ്ഞ അണ്ണാരക്കണ്ണന്മാര് ഇപ്പോള് വംശനാശ ഭീഷണി നേരിടുകയാണ് (മാതൃഭൂമി, 15 ഓഗസ്റ്റ്). കേരളത്തിലെമ്പാടും ഒരു കാലത്ത് പതിവ് കാഴ്ച്ചയായിരുന്ന അണ്ണാന് ഇല്ലാതാകുന്നു എന്ന് കേള്ക്കുമ്പോള് ആദ്യം നടുക്കം, പിന്നെ സങ്കടം :(
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കഴിഞ്ഞ മൂന്നു വര്ഷങ്ങളില് എണ്ണം 80-ശതമാനത്തിലധികം കുറഞ്ഞ അണ്ണാരക്കണ്ണന്മാര് ഇപ്പോള് വംശനാശ ഭീഷണി നേരിടുകയാണ് (മാതൃഭൂമി, 15 ഓഗസ്റ്റ്). കേരളത്തിലെമ്പാടും ഒരു കാലത്ത് പതിവ് കാഴ്ച്ചയായിരുന്ന അണ്ണാന് ഇല്ലാതാകുന്നു എന്ന് കേള്ക്കുമ്പോള് ആദ്യം നടുക്കം, പിന്നെ സങ്കടം :(
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Hands Across the Conference Table: Coordinating Simultaneous Agile Work Streams
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www.thoughtworks.com
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14 years ago
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eng
Most of the people I interact with are unequivocally excited about the opportunity to try agile for the first time. Not.
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