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Providing opportunities for students to gain experience in software development and grow the skills necessary to excel in their careers after graduation is a top priority for Cerner Engineering. Our annual Software Intern Program gives students insight into the design, implementation, testing, deployment, and maintenance of large-scale software projects, which are often beyond the scope of the typical academic experience. In 2013, we had a ..
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Speaking of Ben Evans and Amazon back in August 1 , when Amazon was the hot topic of discussion amongst the small circles we tend to frequent, he neatly and concisely explained many of the mysteries surrounding the company. For instance, why does Amazon turn nearly zero profit? And why, for crying out loud, do so many have such considerable faith in this curious company? ↩ This should give you a general idea as to how good I am at ke..
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From last month but no less applicable now, Benedict Evans takes a few moments to break down the core businesses of Apple, Amazon, and Google. And that’s all it took: a few moments. If only more “tech journalists” would read this before writing — or performing some semblance of the act — their next article. Permalink.
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Like most fun stories this one starts with getting drunk. One summer night I got very drunk at a party. In the morning I hated the hangover and myself. I wanted to try something new. I was going for my first internship the following week, travelling to California. Getting to a new place, I decided to try an experiment - try to make it until my birthday without drinking - month and a half on the dry. I didn’t. I gave in and watched Batman ....
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Video blogs, or vlogs, are becoming increasingly popular and if you have a decent following on Twitter/Facebook/etc then you probably also have a YouTube channel from which to pontificate. Vlogs are great. I get to know you a little better because I can hear your accent, the tone of your voice, and see all the non-verbal facial expressions that add so much to any communication. But there are several downsides, too.
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In the last twenty years there has been a lot of research in a subfield of machine learning called Bandit Learning. The name comes from the problem of being faced with a large sequence of slot machines (once called one-armed bandits) each with a potentially different payout scheme. The problems in this field all focus on one central question: If I have many available actions with uncertain outcomes, how should I act to maximize the quality ..
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In the last twenty years there has been a lot of research in a subfield of machine learning called Bandit Learning. The name comes from the problem of being faced with a large sequence of slot machines (once called one-armed bandits) each with a potentially different payout scheme. The problems in this field all focus on one central question: If I have many available actions with uncertain outcomes, how should I act to maximize the quality ..
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In the last twenty years there has been a lot of research in a subfield of machine learning called Bandit Learning. The name comes from the problem of being faced with a large sequence of slot machines (once called one-armed bandits) each with a potentially different payout scheme. The problems in this field all focus on one central question: If I have many available actions with uncertain outcomes, how should I act to maximize the quality ..
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About 5 months ago, I was asked to join a Ruby on Rails project. After a lot of thinking whether I should switch to a new language after programming in Java for about 8 years or not I decided to do so. I was really excited actually and I couldn’t wait to start learning the new stuff. Day one I had an introduction to the development environment. A text editor and a console. I said, “OK, this must be this guy’s thing, I’ll download an IDE”.....
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Amidst all the hubbub that invariably follows every Apple event as embargoes lift and reviews flood the internet, as writers formulate, present, and respond to thoughts and opinions regarding Apple’s latest moves, it’s easy to lose a diamond in the rough. The problem is further compounded when amongst other diamonds, to continue stretching this metaphor, such as John Siracusa’s famous Mavericks review . Such was the case when Stephen Hacke..
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I realize I have come late to the party, but after just two weeks that does not change the relevancy of John Gruber’s article written in the wake of Apple’s October iPad event. Many wrote about a single aspect: Marco chimed in on the presentation itself , and I devoted an entire article to the notion of an upcoming iPad Pro ; others, such as Jim Dalrymple , attempted the more monumental task of tackling the entire event; still others put....
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This completely blindsided me. I had the lack of foresight to uninstall the betas after Instapaper 5 hit the market, so I had no idea a revamped iPad app was in the works until coming across the announcement in my Twitter feed late yesterday evening. Thanks iOS 7’s automatic update feature, I got to experience Betaworks’ latest revision firsthand as soon as I opened the app; and as I said on Twitter , I really like the new design. The folk..
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When I started writing Need, Fashion, and Matt Alexander I began with the title “Harry Marks Interviews Matt Alexander on Need”. Those curious can look to the post’s URL for confirmation, which still reads as described despite the fact that I changed its title. I set out with such a headline intending to make a short congratulatory post linking to Harry Marks’ article Interview with Matt Alexander of Need ; however, ambition got th..
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Composer is amazing for pulling in packages, but what if you find a Gist that isn't Composer aware? Fear not, as Composer has the magical ability to pull in repositories not explicitly set up in Packagist by defining them in the "repositories" section. But what if you wanted to load a single class from a git gist? You can add the following repositories section to your composer.json file, adjusting name and url as necessary. The name s....
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Composer is amazing for pulling in packages, but what if you find a Gist that isn't Composer aware? Fear not, as Composer has the magical ability to pull in repositories not explicitly set up in Packagist by defining them in the "repositories" section. But what if you wanted to load a single class from a git gist? You can add the following repositories section to your composer.json file, adjusting name and url as necessary. The name s....
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Diagnosing buffer busy waits with the ash_wait_chains.sql script (v0.2)
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tanelpoder.com
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12 years ago
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eng
In my previous post ( Advanced Oracle Troubleshooting Guide – Part 11: Complex Wait Chain Signature Analysis with ash_wait_chains.sql ) I introduced an experimental script for analysing performance from “top ASH wait chains” perspective. The early version (0.1) of the script didn’t have the ability to select a specific user (session), SQL or module/action performance data for analysis. I just hadn’t figured out how to write the SQL for th..
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Diagnosing buffer busy waits with the ash_wait_chains.sql script (v0.2)
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tanelpoder.com
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12 years ago
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eng
In my previous post ( Advanced Oracle Troubleshooting Guide – Part 11: Complex Wait Chain Signature Analysis with ash_wait_chains.sql ) I introduced an experimental script for analysing performance from “top ASH wait chains” perspective. The early version (0.1) of the script didn’t have the ability to select a specific user (session), SQL or module/action performance data for analysis. I just hadn’t figured out how to write the SQL for th..
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For my next project, I was exploring the session storages for ExpressJS, and I found a question on StackOverflow, but I was frustrated with the accepted and 30 upvoted answer, which compares local in memory session store with remote session stores. The answer is very misleading, there is no chance that remote storage can beat local storage, even if the in-memory solution does O(n^9) calculations, it would be faster than going to web.
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In the works for nearly a year , Matt Alexander’s new startup Need addresses a fascinating deficiency of not just fashion, but any degree of concern with respect to one’s physical appearance all too prevalent in today’s society, especially amongst young people. At nineteen a young person myself, I speak from first-hand experience: you would not believe the things I see my peers wearing, especially on a college campus. I am not wholly exemp..
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Following Apple’s event last week and after I ordered a top of the line 15“ Retina MacBook Pro, I sat down to read John Siracusa’s famous Mavericks review . I started last year’s Lion review with good intentions, but without any incentive to finish I only read a few pages. This year though, with a shiny new Mac already on its way from China, I finally had more of a reason to persevere than simply to say that I had. Surprisingly, that gra..
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Greg 1.0 Born in the Bronx. Grew up in upper middle class suburban New Jersey. College at Virginia Tech: went in a Computer Science major, came out with a B.A. in Interdisciplinary Studies. College summers working at Walt Disney World, first at Cosmic Ray's Starlight Cafe
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Hi there, I hope you enjoyed my “ Pushing Puppet (to its limit)” talk and demos from Puppet Camp D.C., LISA 2013 . As requested, I’ve posted the code and slides. Here is the code: https://github.com/purpleidea/puppet-pushing This module will require three modules as dependencies. The dependencies are: My Puppet-Common module https://github.com/purpleidea/puppet-common My Puppet-Runonce module https://github.com/purpleid..
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Hi there, I hope you enjoyed my “ Pushing Puppet (to its limit)” talk and demos from Puppet Camp D.C., LISA 2013 . As requested, I’ve posted the code and slides. Here is the code: https://github.com/purpleidea/puppet-pushing This module will require three modules as dependencies. The dependencies are: My Puppet-Common module https://github.com/purpleidea/puppet-common My Puppet-Runonce module https://github.com/purpleid..
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XML libraries in Java is a minefield. The amount of code required to manipulate and read XML is staggering, the risk of getting class path problems with different libraries is substantial and the handling of namespaces opens for a lot of confusion and errors. The worst thing is that the situation doesn’t seem to improve. A colleague made me aware of the JOOX library some time back. It’s a very good attempt to patch these problems.
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I’m here at LISA 2013 at the Gluster Community Day . I’ve been asked by Joe Brockmeier to give a little recap about what’s been going on. So here it is! Wesley Duffee-Braun started off with a nice overview talk about GlusterFS . The great thing about his talk was that he gave a live demo, running on virtual machines, on his laptop. If you’re a new GlusterFS user, this is good exposure to help you get started. He also has the nicest ..
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I’m here at LISA 2013 at the Gluster Community Day . I’ve been asked by Joe Brockmeier to give a little recap about what’s been going on. So here it is! Wesley Duffee-Braun started off with a nice overview talk about GlusterFS . The great thing about his talk was that he gave a live demo, running on virtual machines, on his laptop. If you’re a new GlusterFS user, this is good exposure to help you get started. He also has the nicest ..
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Linux is unique to Windows in many ways, and writing programs in Linux is no exception. The use of standard out, standard err and null devices is not only a good idea but it’s the law. If your programs are going to be logging information, it is best to follow the destination conventions. This way your programs will work with all of the Mac/Linux tooling and hosted environments. Go has a package in the standard library called log and a ..
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Javascript Allongé @raganwald is one of the more refreshing coding books I have read in a big while. Usually when I face a programming language book, I skip the beginner chapters (if I already know the language, of course) and go directly for the juicy ones, but with this one I tried to follow it from end to end because I read some comments on twitter telling that the way basics are explained, become a really solid base for the language,....
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Prefer double quotes if escaping single quotes. Prefer string interpolation over join. Eg. "'%s'" % member_default. Prefer double underscore for privates. Prefer with statement to implicitly close file. with open(path, 'r') as text_file: text = text_file.read() Prefer list comprehensions to filter. Prefer using separate modules over classes if only using for separation. Keep in mind: "eafp vs lbyl" (ie. just let it throw). Prefer except....
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I’m speaking at LISA 2013 , the “Large Installation System Administration” conference. This conference runs all week in Washington . I’ll be giving two talks during the week, and attending at least one BOF. My first talk is on Monday during the Gluster Community Day . I’ll be speaking about puppet-gluster , and giving a live demo. I’ll be showing some new features too. If you’d like to talk more about puppet-gluster, or want to attend..
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I’m speaking at LISA 2013 , the “Large Installation System Administration” conference. This conference runs all week in Washington . I’ll be giving two talks during the week, and attending at least one BOF. My first talk is on Monday during the Gluster Community Day . I’ll be speaking about puppet-gluster , and giving a live demo. I’ll be showing some new features too. If you’d like to talk more about puppet-gluster, or want to attend..
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Today I want to present my Tiny Tiny RSS -installation, running on my own VPS . tt-rss is “an open source web-based news feed ( RSS /Atom) reader and aggregator, designed to allow you to read news from any location, while feeling as close to a real desktop application as possible.” Preface Update: Since 30.01.2015 the installation and update-mechanism switched to git . I (hopefully) updated the post accordingly. I’m r....
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JS Error using X-Editable If you're trying to use X-Editable and getting a JS error similar to this... TypeError: $.fn.popover.defaults is undefined It may be because you're using Bootstrap 3 and using their CDN urls for including their JS and CSS. Their CDN currently only hosts their Bootstrap 2 code. To use it with Bootstrap 3, you need to download their repository and host it locally.
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Jon Skeet was once asked to give three questions to check how well you know C#. He asked the following questions : Q1. What constructor call can you write such that this prints True (at least on the Microsoft .NET implementation)? object x = new /* fill in code here */ ; object y = new /* fill in code here */ ; Console . WriteLine ( x == y ); Note that it’s just a constructor call, an....
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Jon Skeet was once asked to give three questions to check how well you know C#. He asked the following questions : Q1. What constructor call can you write such that this prints True (at least on the Microsoft .NET implementation)? object x = new /* fill in code here */ ; object y = new /* fill in code here */ ; Console . WriteLine ( x == y ); Note that it’s just a constructor call, an....
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I am working on a project that requires pulling and processing different XML feeds from the web and storing the data into MongoDB as JSON. Since new feeds come up everyday, changing the Go program to process and publish new feeds is out of the question. A second constraint is that processing has to work in Iron.io or any other linux cloud based environment. What I needed was a Go program that could take an XML document and XSLT stylesh....
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After a long hiatus, let’s continue our foray into amateur genomics with Clojure , in which we continue to encounter elegant expressions of Clojure’s power as well as a few additional wrinkles in the Clojure ecosystem (in this case, Incanter). In our last post we upgraded our genome decoder and used it to show frequencies of the four nucleotides, illustrating Chargaff’s Rule . Another simple question to be asked of the data is, Wh....
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After a long hiatus, let’s continue our foray into amateur genomics with Clojure , in which we continue to encounter elegant expressions of Clojure’s power as well as a few additional wrinkles in the Clojure ecosystem (in this case, Incanter). In our last post we upgraded our genome decoder and used it to show frequencies of the four nucleotides, illustrating Chargaff’s Rule . Another simple question to be asked of the data is, Wh....
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After a long hiatus, let’s continue our foray into amateur genomics with Clojure , in which we continue to encounter elegant expressions of Clojure’s power as well as a few additional wrinkles in the Clojure ecosystem (in this case, Incanter). In our last post we upgraded our genome decoder and used it to show frequencies of the four nucleotides, illustrating Chargaff’s Rule . Another simple question to be asked of the data is, Wh....
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I hesitate to pass judgement just yet, but after the first I can’t say I’m all too hopeful for a sequel. Taking a more adult approach in production will certainly help, but then again the first film didn’t exactly set a high bar. Permalink.
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