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Il sito del progetto Git è stato finalmente aggiornato. Nuova grafica, nuovo logo, ottimizzazione dei contenuti e soprattutto integrazione di importanti risorse prima ospitate altrove: la Git Reference, il libro ProGit, Why Git is Better Than X e il nuovo progetto Git Video Series, che include quattro bei filmati già pronti.
This post is a list of many of the reasons to use Postgres, much this content as well as how to use these features will later be curated within PostgresGuide.com . If you need to get started check out Postgres.app for Mac, or get a Cloud instance at Heroku Postgres for free Last week I did a post on the many reasons to use Postgres . My goal with the post was two fold: Call out some of the historical arguments against it that don....
This post is a list of many of the reasons to use Postgres, much this content as well as how to use these features will later be curated within PostgresGuide.com . If you need to get started check out Postgres.app for Mac, or get a Cloud instance at Heroku Postgres for free Last week I did a post on the many reasons to use Postgres . My goal with the post was two fold: Call out some of the historical arguments against it that don....
Over the past few days I’ve been processing my thoughts about the Guild Wars 2 Beta Weekend Event, which was now a couple of weeks ago.
Venite da PHP e siete incuriositi da Python? Vi consiglio la lettura di Python FAQ Webdev: i web framework Python dal punto di vista di un ex sviluppatore PHP.
Venite da PHP e siete incuriositi da Python? Vi consiglio la lettura di Python FAQ Webdev: i web framework Python dal punto di vista di un ex sviluppatore PHP.
Venite da PHP e siete incuriositi da Python? Vi consiglio la lettura di Python FAQ Webdev: i web framework Python dal punto di vista di un ex sviluppatore PHP.
Ogni tanto ricevo proposte di lavoro che non sono in grado di soddisfare né direttamente (per mancanza di tempo o know-how) né indirettamente (passando nomi di colleghi e conoscenti). E’ questo il caso della richiesta di Michele, che vi propongo nel caso qualcuno di voi sia interessato. Sia chiaro che io non c’entro e non ci guadagno nulla; mi interessa solo favorire domanda e offerta e mi limito, col permesso dell’autore, a ripubblicare il..
Problem: Prove that $ 2 = 4$. Solution: Consider the value of the following infinitely iterated exponent: $$\displaystyle \sqrt{2}^{\sqrt{2}^{\sqrt{2}^{\cdot^{\cdot^{\cdot}}}}}$$ Let $ a_n = \sqrt{2} \uparrow \uparrow n$, that is, the above power tower where we stop at the $ n$-th term. Then $ a_n$ is clearly an increasing sequence, and moreover $ a_n \leq 4$ by a trivial induction argument: $ \sqrt{2} \leq 4$ and if $ a_n \leq 4$ then $ a_..
Problem: Prove that $ 2 = 4$. Solution: Consider the value of the following infinitely iterated exponent: $$\displaystyle \sqrt{2}^{\sqrt{2}^{\sqrt{2}^{\cdot^{\cdot^{\cdot}}}}}$$ Let $ a_n = \sqrt{2} \uparrow \uparrow n$, that is, the above power tower where we stop at the $ n$-th term. Then $ a_n$ is clearly an increasing sequence, and moreover $ a_n \leq 4$ by a trivial induction argument: $ \sqrt{2} \leq 4$ and if $ a_n \leq 4$ then $ a_..
Problem: Prove that $ 2 = 4$. Solution: Consider the value of the following infinitely iterated exponent: $$\displaystyle \sqrt{2}^{\sqrt{2}^{\sqrt{2}^{\cdot^{\cdot^{\cdot}}}}}$$ Let $ a_n = \sqrt{2} \uparrow \uparrow n$, that is, the above power tower where we stop at the $ n$-th term. Then $ a_n$ is clearly an increasing sequence, and moreover $ a_n \leq 4$ by a trivial induction argument: $ \sqrt{2} \leq 4$ and if $ a_n \leq 4$ then $ a_..
First a huge thanks to all organizers of conferences, but especially for those that organize not-for-profit conferences. I do understand its a great amount of work, and in nearly all cases have greatly appreciated the experience made available by the work they put into it. As for some guidance. I’ve been on nearly all sides of the conference with the exception of organizing, so again organizers please don’t take offense to the feedback. ....
First a huge thanks to all organizers of conferences, but especially for those that organize not-for-profit conferences. I do understand its a great amount of work, and in nearly all cases have greatly appreciated the experience made available by the work they put into it. As for some guidance. I’ve been on nearly all sides of the conference with the exception of organizing, so again organizers please don’t take offense to the feedback. ....
Typing - www.craigpardey.com - 14 years ago - eng
If there was one piece of advice I could give to someone considering a career in software development it would be: Learn to f$%@cking type! Knowing how to touch type is the single most valuable skill that a developer can possess. Typing allows you to concentrate on what you’re coding rather than how to get the characters on the screen. In other words, you’re able to think about the code rather than thinking about where to find the let..
When you troubleshoot an Oracle (performance) problem you usually want to find out what are the problem sessions doing (wrong) and then why are they doing it. The “what” question is usually answered using some wait interface based method – like ASH or SQL*Trace, which both add plenty of extra details to the plain wait event data. My normal session troubleshooting data collection sequence consists of only three steps: Interpret se..
When you troubleshoot an Oracle (performance) problem you usually want to find out what are the problem sessions doing (wrong) and then why are they doing it. The “what” question is usually answered using some wait interface based method – like ASH or SQL*Trace, which both add plenty of extra details to the plain wait event data. My normal session troubleshooting data collection sequence consists of only three steps: Interpret se..
Hi, I haven’t really talked about stats very much for the application. I thought this would be a good time to do just that. Thanks to everyone who has downloaded the app and continues to use it. As always, get in touch with any and all feedback and hopefully we can continue to make the app great. Headline figures are 200k downloads and 2,000,000+ sessions (since using flurry). Never expected this when I started working on this as a st..
I dug up some old publicly listed transcripts from The Personality Forge forums. The Personality Forge is a chat bot creation website that I used to frequent on an almost religious basis between about 2004 and 2007. I worked on a chat bot who identified as a 16 year old boy who felt he was human. I wanted to make him sound as human as possible in speech and put lots of typos and grammatical errors into his keyphrases, even using some respon....
Trawling through the logs of search queries I noticed that some people are using the Google Code Search lang syntax. An example that I spotted was the following “throw.* runtime_error lang:c++” Note the lang:c++ portion. Of couse this ended up spitting back no useful results because the lang:c++ was treated as part of the search. Well no longer is this the case. searchcode now supports the lang keyword in addition to the existing ext on..
This post is a list of many of the reasons to use Postgres, much this content as well as how to use these features will later be curated within PostgresGuide.com . If you need to get started check out Postgres.app for Mac, or get a Cloud instance at Heroku Postgres for free UPDATE: A part 2 has been posted on Why Use Postgres Very often recently I find myself explaining why Postgres is so great. In an effort to save myself a....
This post is a list of many of the reasons to use Postgres, much this content as well as how to use these features will later be curated within PostgresGuide.com . If you need to get started check out Postgres.app for Mac, or get a Cloud instance at Heroku Postgres for free UPDATE: A part 2 has been posted on Why Use Postgres Very often recently I find myself explaining why Postgres is so great. In an effort to save myself a....
Performance - www.craigpardey.com - 14 years ago - eng
I recently embarked upon a performance investigation to figure out why a particular operation was slow. My theory was that it was the serialization/deserialization cost with a set of large objects; my colleague’s theory was the iteration over the set. We were both wrong. The investigation became intriguing when we started measuring the elapsed time at various points in the application and noticed that the bulk of the time was being spent ..
My computer met with a large quantity of pepi max last night. Currently the only working computer I have is my work machine, well this isn’t strictly true, I also have a very damp one that won’t turn on. Aside from these ramblings and more to the point, this means that until I can save, order and build a new machine (and hopefully recover my data) I’m unable to continue work on the BBC News app. I know there is currently a minor bug aroun..
My main computer met with a large quantity of pepi max last night. Currently the only working computer I have is my work machine, well this isn’t strictly true, I also have a very damp one that won’t turn on. Aside from these ramblings and more to the point, this means that until I can spec, order and build a new machine and hopefully recover my data I’m unable to continue work on the BBC News app. I know there is currently a minor bug ar..
Laying the foundation of western thought and philosophy, few civilizations in history have contributed to humanity more than the Greeks.
If you were following my blog, you may seem that I have once tried to make WS-FTP project with Java, however the web-sockets were on draft and it was changing quickly and they were not safe. Meantime, I have learned and mastered NodeJS and met Socket.io, and I decided to use them, since they were providing a better interface and it was much more easier to code a web server with NodeJS rather than Java.
caption id=“attachment_48002” align=“alignleft” width=“225” caption=“Look at that face…I don’t think Keeda is as excited about this endeavour as I am.”][/caption]
One feature I miss from my Perl days, which I’ve never seen in another language. I am writing a test loop and I want it to run 10k times. So I write, in Java: for (int i = 0; i < 10000; i++) { ... } Nothing surprising about that. But in Perl I could write: for (my $i = 0; $i < 10_000; $i++) { ... } You can put underscores anywhere when writing number literals, and they will get ignored by Perl. So you can make such large numbers a lot..
Overview In this primer we’ll get a first taste of the mathematics that goes into the analysis of sound and images. In the next few primers, we’ll be building the foundation for a number of projects in this domain: extracting features of music for classification, constructing so-called hybrid images, and other image manipulations for machine vision problems (for instance, for use in neural networks or support vector machines; we’re planning..
Overview In this primer we’ll get a first taste of the mathematics that goes into the analysis of sound and images. In the next few primers, we’ll be building the foundation for a number of projects in this domain: extracting features of music for classification, constructing so-called hybrid images, and other image manipulations for machine vision problems (for instance, for use in neural networks or support vector machines; we’re planning..
Overview In this primer we’ll get a first taste of the mathematics that goes into the analysis of sound and images. In the next few primers, we’ll be building the foundation for a number of projects in this domain: extracting features of music for classification, constructing so-called hybrid images, and other image manipulations for machine vision problems (for instance, for use in neural networks or support vector machines; we’re planning..
The nostalgia of serial console servers, kvm’s and switched PDU’s is hopefully no longer visible in your server room. If not, you must definitely start playing catch up. Please forgive my ignorance, but these things might still be common for big windows shops, however if that’s the case, you’ve got an entirely different set of problems ;) IPMI is an IP based protocol that allows you to talk directly to a little computer, usually built in ..
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