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  Erlang Style Concurrency

Introduction On an evolutionary scale of innovation from one to ten (one being Bloomberg and Citi Group, eight being Google and Cirque Du Soleil, and ten being the company you couldn't imagine in your wildest dreams), the company I work for is about a three1. Being employed by this bastion of ingenuity affords me certain opportunities I can't get elsewhere. For example, every developer gets to interview potential...

   Erlang,Concurrency,Lock,Message,Innovation     2012-01-03 10:44:44

  Supercolliding a PHP array

Did you know that inserting 2^16 = 65536 specially crafted values into a normal PHP array can take 30 seconds? Normally this would take only 0.01 seconds. This is the code to reproduce it: <?php echo '<pre>'; $size = pow(2, 16); // 16 is just an example, could also be 15 or 17 $startTime = microtime(true); $array = array(); for ($key = 0, $maxKey = ($size - 1) * $size; $key <= $maxKey; $key += $size) { $array[$key] = 0; } $endTime = microtime(true); echo 'Inserting...

   PHP,Array,hashtable,Slow,Colliding     2011-12-29 09:02:01

  Uber’s audio recording plan in Brazil and Mexico

Uber has recently come out with a plan to introduce a new feature to its App in Brazil and Mexico. The feature will record the conversations between the driver and the passenger, with their consent. But consent here is a bit tricky. Basically, if the driver decides to turn on the recording feature, they are not obligated to warn the passenger and vice versa. Once the recording has been made and submitted to support for some kind of violation, neither of the two parties will have the ability...

   UBER,SECURITY,PRIVACY,VOICE RECORDING APP,NEW FEATURE     2019-11-21 09:20:36

  "Programmer" is an Overgeneralization

"Beware of bugs in the above code; I have only proved it correct, not tried it." - Donald Knuth Earlier today, I came across a post during a google-fu session that claimed that no one should use the C++ standard library function make_heap, because almost nobody uses it correctly. I immediately started mentally ranting about how utterly ridiculous this claim is, because anyone whose gone to a basic algorithm class would know how to properly use make_heap. Then I started thinking about all the ...

   Programmer,Overgeneration,Overload     2012-03-13 08:13:16

  Javascript Frameworks Are Too Small

A while back I stumbled upon a great post by Jean-Baptiste Queru. It describes the incredible depth of the modern technology stack. Layers upon layers of complex science, hardware, and software, each layer creating a simpler abstraction around the previous. This ultimately enables our paltry human brains to create amazing things that would otherwise be impossible (or really difficult). This is, in my opinion, the lifeblood of modern software development. For some reason, however, when i...

   JavaScript,Framework,Size,Small,jQuery     2012-01-10 07:20:59

  Taking Precautions to Avoid Shady VPN Providers

VPNs or virtual private networks are virtual tunnels that obscure your IP address, routing your internet traffic through a server located in a country of your choice, in an encrypted and anonymous way. Using a VPN allows you to: secure your sensitive data from hackers obscure the IP address so you can see content not available in your country avoid websites you routinely surf (e.g., Facebook) noticing a different IP address when you are traveling, and asking you to verify your identity bypass t...

   VPN,NETWORKING     2019-02-19 07:26:26

  High performance web apps with C++

It is Christmas over here, and it is time of giving. So I decided to give something back to the community. I guess this is as old as web programming itself. Trying to create C++ web framework. If you search on the web, you can find dozen of guys that had exactly the same idea. I am not different. For one of the previous projects(discontinued now) I created simple web framework in C++. If you like to hack in C++, here it is. Code is provided as-is, as part of larger application. You can ex...

   C++,Web apps,Web framework     2012-01-08 10:06:48

  How can I teach a bright person, with no programming experience, how to program?

I usually prescribe the same sequence for anyone who wants to learn programming. It's very theoretical, but it lays a good foundation. It should take three or four months of fulltime study, but programming isn't something you learn overnight.If you can't get through this sequence, you're not going to be able to program, so you might as well give up now.Code, by Charles Petzold.The C Programming Language, K&RThe Structure and Interpretation of Computer Programs, Abelson and Sussman.My rule is...

   Steps,Programming,No experience,No knowledge     2011-11-07 08:27:48

  10 notorious computer virus

The history of computer virus is the same as computer history. With more and more powerful computers, virus also are smarter and harder to be detected and killed. They have big impact on data security and system usability. We introduce 10 notorious computer virus in the history. 1. Creeper In 1971, the Creeper virus, an experimental self-replicating program, is written by Bob Thomas at BBN Technologies. Creeper infected DEC PDP-10 computers running the TENEX operating sy...

   Computer virus,History,Security     2013-07-16 21:09:22

  5 tips for selling your software company for maximum value

From the moment you start your software company, you should be developing an exit strategy. While you might have no plans to sell your business, things can go wrong, and you can find yourself in a position with no other option. In this case, having a plan to go to will make the entire process easier. If you do plan on selling, you should be constantly improving your exit strategy as your business evolves in order to ensure you sell your company for maximum value. Selling a software company can ...

   TIPS,BUSINESS,SELLING,SOFTWARE BUSINESS     2017-11-14 03:44:52

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