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Happy Birthday

Today marks a special day for us on the App Engine team. It was just thirty-six years ago today that IBM announced the IBM System/360 . As Wikipedia...

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Are the criticisms against Dart valid?

- by Hassan

According to this Wikipedia article, Microsoft, Apple, Mozilla, and others criticize Dart, a programming language Google introduced to work in web browsers, because they feel "it seems harmful (cf. VBScript in IE)". But Dart also compiles to Javascript, so a web application written in Dart can run on any modern browser. So are their concerns valid? Can Dart really be a threat to the web's openness?

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What is enterprise software, exactly?

- by good_computer

I don't understand the difference between "normal" software and enterprise software. Even after reading these... "Enterprise Software" on Wikipedia "Enterprise Software Is Sexy Again" on Techcrunch "The Great Enterprise Software Swindle" on Coding Horror I can't really wrap my head around the real differences. Is there any difference at all between the two? Why do people say enterprise software sucks?

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Get to Know a Candidate (12 of 25): Andre Barnett–Reform Party

- by Brian Lanham

DISCLAIMER: This is not a post about “Romney” or “Obama”. This is not a post for whom I am voting. Information sourced for Wikipedia. Barnett is an American politician and entrepreneur. He is the founder of the information technology (IT) company WiseDome Inc. Barnett was born in Zanesville, Ohio in 1976. He attended Austin Peay State University and Western Governors University. A former member of the United States Armed Forces, Barnett served in Sarajevo before being wounded in a helicopter accident. Following his military service, Barnett became a fitness model in New York. In 2001, he founded WiseDome Incorporated, an IT company that provides information technology and data recovery services. Reform Party of the United States of America (RPUSA), generally known as the Reform Party USA or the Reform Party, is a political party in the United States, founded in 1995 by Ross Perot. Perot said Americans were disillusioned with the state of politics—as being corrupt and unable to deal with vital issues—and desired a viable alternative to the Republican and Democratic Parties. The party has nominated different candidates over the years, such as founder Ross Perot, Pat Buchanan, and Ralph Nader. The party's most significant victory came when Jesse Ventura was elected governor of Minnesota in 1998. Since then, the party has been torn by infighting and disagreements, which it seeks to overcome. The Reform Party platform includes the following: * Maintaining a balanced budget, ensured by passing a Balanced Budget Amendment and changing budgeting practices, and paying down the federal debt * Campaign finance reform, including strict limits on campaign contributions and the outlawing of the Political action committee * Enforcement of existing immigration laws and opposition to illegal immigration * Opposition to free trade agreements like the North American Free Trade Agreement and Central America Free Trade Agreement, and a call for withdrawal from the World Trade Organization * Term limits on U.S. Representatives and Senators * Direct election of the United States President by popular vote * Federal elections held on weekends A noticeable absence from the Reform Party platform has been social issues, including abortion and gay rights. Reform Party representatives had long stated beliefs that their party could bring together people from both sides of these issues, which they consider divisive, to address what they considered to be more vital concerns as expressed in their platform. The idea was to form a large coalition of moderates; that intention was overridden in 2001 by the Buchanan takeover which rewrote the RPUSA Constitution to specifically include platform planks opposed to any form of abortion. The Buchananists, in turn, were overridden by the 2002 Convention which specifically reverted the Constitution to its 1996 version and the party's original stated goals. Barnett has Ballot Access in: FL Learn more about Andre Barnett and Reform Party on Wikipedia.

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Search engine optimization Links

- by Michael Freidgeim

Below there are a few links, that I used for my Search engine optimization research: http://websearch.about.com/od/designforsearch/ss/tendesigntips.htm Keyword Selection Guidelines Where To Use Keywords Google Search Engine Optimization http://websearch.about.com/od/keywordsandphrases/a/sitedesign.htm http://en.wikipedia.org/wiki/Search_engine_optimization http://www.google.com/support/webmasters/bin/answer.py?answer=35291

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What's the difference between MariaDB and MySQL?

- by Chris J. Lee

What's the difference between MariaDB and MySQL? I'm not very familiar with both. I'm primarily a front end developer for the most part. Are they syntactically similar? Where do these two query languages differ? Wikipedia only mentions the difference between licensing: MariaDB is a community-developed branch of the MySQL database, the impetus being the community maintenance of its free status under GPL, as opposed to any uncertainty of MySQL license status under its current ownership by Oracle.

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How did programming work when programmers used punchcards?

- by Thomas Dignan

I saw this: Learning to program on punchcards and I've seen this: http://en.wikipedia.org/wiki/Computer_programming_in_the_punched_card_era but they leave much to be desired. Can anyone explain to me how programmers programmed when they used punchcards? Specifically, the system of input computers used to derive instructions from the punched card itself. I do not know much about retrocomputers, so any one system of input you are familiar with would be fine. More general answers are also appreciated.

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Is there a way to disallow only crawling in https in robots.txt?

- by David Wilkins

I just realized that Bingbot is crawling my company's website's pages over https. Bing already crawls the site over http, so this seems frivolous. Is there a way to specify Disallow: / for https only? According to Wikipedia, each protocol has its own robots.txt And according to Google's Robots.txt Specification, the robots.txt applies to http AND https I don't want to Disallow: / for Bing totally, just over https.

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Which statically typed languages support intersection types for function return values?

- by stakx

Initial note: This question got closed after several edits because I lacked the proper terminology to state accurately what I was looking for. Sam Tobin-Hochstadt then posted a comment which made me recognise exactly what that was: programming languages that support intersection types for function return values. Now that the question has been re-opened, I've decided to improve it by rewriting it in a (hopefully) more precise manner. Therefore, some answers and comments below might no longer make sense because they refer to previous edits. (Please see the question's edit history in such cases.) Are there any popular statically & strongly typed programming languages (such as Haskell, generic Java, C#, F#, etc.) that support intersection types for function return values? If so, which, and how? (If I'm honest, I would really love to see someone demonstrate a way how to express intersection types in a mainstream language such as C# or Java.) I'll give a quick example of what intersection types might look like, using some pseudocode similar to C#: interface IX { … } interface IY { … } interface IB { … } class A : IX, IY { … } class B : IX, IY, IB { … } T fn() where T : IX, IY { return … ? new A() : new B(); } That is, the function fn returns an instance of some type T, of which the caller knows only that it implements interfaces IX and IY. (That is, unlike with generics, the caller doesn't get to choose the concrete type of T — the function does. From this I would suppose that T is in fact not a universal type, but an existential type.) P.S.: I'm aware that one could simply define a interface IXY : IX, IY and change the return type of fn to IXY. However, that is not really the same thing, because often you cannot bolt on an additional interface IXY to a previously defined type A which only implements IX and IY separately. Footnote: Some resources about intersection types: Wikipedia article for "Type system" has a subsection about intersection types. Report by Benjamin C. Pierce (1991), "Programming With Intersection Types, Union Types, and Polymorphism" David P. Cunningham (2005), "Intersection types in practice", which contains a case study about the Forsythe language, which is mentioned in the Wikipedia article. A Stack Overflow question, "Union types and intersection types" which got several good answers, among them this one which gives a pseudocode example of intersection types similar to mine above.

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Columnar Databases

- by jchang

Ingres just published a TPC-H benchmark for VectorWise , an analytic database technology employing 1) SIMD processing (Intel SSE 4.2), 2) better memory optimizations to leverage on-chip cache, 3) compression, 4) Column-based storage. Ingres originated as a research project at UC Berkeley (see Wikipedia ) in the 1970s, and has since become a commercially supported, open source database system. Apparently, Ingres project people later founded Sybase. So Ingres in a sense, is the grandfather (or perhap...(read more)

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Where does the term "Front End" come from?

- by Richard JP Le Guen

Where does the term "front-end" come from? Is there a particular presentation/talk/job-posting which is regarded as the first use of the term? Is someone credited with coining the term? The Merriam-Webster entry for "front-end" claims the first known use of the term was 1973 but it doesn't seem to provide details about that first known use. Likewise, the Wikipedia page about front and back ends is fairly low quality, and cites very few sources.

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Why is iOS "jailbreaking" CPU specific? [closed]

- by Ted Wong

Recently, iOS 6 was "jailbroken" but only on the Apple A4 CPU. Why is the "jailbreaking" process specific to a CPU? From Wikipedia: ... "iOS jailbreaking is the process of removing the limitations imposed by Apple on devices running the iOS operating system through the use of hardware/software exploits – such devices include the iPhone, iPod touch, iPad, and second generation Apple TV. Jailbreaking allows iOS users to gain root access to the operating system""" ...

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Why’s Poignant Guide To Ruby

- by Liam McLennan

According to Wikipedia, “why the lucky stiff was the persona of an anonymous, but prolific writer, cartoonist, musician, artist, and computer programmer”. He looks a bit like Jack Black. His book, Why’s Poignant Guide to Ruby, is a classic, though it can be hard to find since Why disappeared. If you want to learn the Ruby programming language I highly recommend Why’s Poignant Guide to Ruby. I am including a link here so that others who search for it may find it more easily.

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Get to Know a Candidate (11 of 25): Roseanne Barr–Peace & Freedom Party

- by Brian Lanham

DISCLAIMER: This is not a post about “Romney” or “Obama”. This is not a post for whom I am voting. Information sourced for Wikipedia. Barr is an American actress, comedienne, writer, television producer, and director. Barr began her career in stand-up comedy at clubs before gaining fame for her role in the sitcom Roseanne. The show was a hit and lasted nine seasons, from 1988 to 1997. She won both an Emmy Award and a Golden Globe Award for Best Actress for her work on the show. Barr had crafted a "fierce working-class domestic goddess" persona in the eight years preceding her sitcom and wanted to do a realistic show about a strong mother who was not a victim of patriarchal consumerism. The granddaughter of immigrants from Europe and Russia, Barr was the oldest of four children in a working-class Jewish Salt Lake City family; she was also active in the LDS Church. In 1974 she married Bill Pentland, with whom she had three children, before divorcing in 1990 and marrying comedian Tom Arnold for four years. Controversy arose when she sang "The Star-Spangled Banner" off-key at a 1990 nationally aired baseball game, followed by grabbing her crotch and spitting. After her sitcom ended, she launched her own talk show, The Roseanne Show, which aired from 1998 to 2000. In 2005, she returned to stand-up comedy with a world tour. In 2011, she starred in an unscripted TV show, Roseanne's Nuts that lasted from July to September of that year, about her life on a Hawaiian farm. The Peace and Freedom Party (PFP) is a nationally-organized political party with affiliates in more than a dozen states, including California, Florida, Colorado and Hawaii. Its first candidates appeared on the ballot in 1966, but the Peace and Freedom Party of California was founded on June 23, 1967, after the LAPD riot in the wealthy Century City section of Los Angeles, and qualified for the ballot in January 1968. The Peace and Freedom Party went national in 1968 as a left-wing organization opposed to the Vietnam War. From its inception, Peace and Freedom Party has been a left-wing political organization. It is a strong advocate of protecting the environment from pollution and nuclear waste. It advocates personal liberties and universal, high quality and free access to education and health care. Its understanding of socialism includes a socialist economy, where industries, financial institutions, and natural resources are owned by the people as a whole and democratically managed by the people who work in them and use them. Barr is on the Ballot in: CA, CO, FL Learn more about Roseanne Barr and Peace and Freedom Party on Wikipedia.

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What features does D3D have that OpenGL does not (and vice versa)?

- by Tom

Are there any feature comparisons on Direct3D 11 and the newest OpenGL versions? Well, simply put, Direct3D 11 introduced three main features (taken from Wikipedia): Tesselation Multithreaded rendering Compute shaders Increased texture cache Now I'm wondering, how does the newest versions of OpenGL cope with these features? And since I have this feeling that there are features that Direct3D lacks from OpenGL's side, what are those?

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SQL Injection Attacks are still occurring

- by TATWORTH

It should be of concern to all developers that SQL Injection attacks are still occurring. Here are some resources on the subject: http://www.darkreading.com/DatabaseSecurity/util/4576/download.html (needs free registration) http://en.wikipedia.org/wiki/SQL_injection http://www.unixwiz.net/techtips/sql-injection.html http://msdn.microsoft.com/en-us/library/ms161953.aspx http://www.sitepoint.com/sql-injection-attacks-safe/ And for a funny view on it see http://xkcd.com/327/ So what are you doing to harden your applications?

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Get to Know a Candidate (2 of 25): Merlin Miller–American Third Position Party

- by Brian Lanham

DISCLAIMER: This is not a post about “Romney” or “Obama”. This is not a post for whom I am voting. Information sourced for Wikipedia. Meet Merlin Miller of American Third Position Party In addition to being American Third Position Party nominee, Miller is an independent film maker. He is a graduate of West Point and has commanded two units in the United States Army. After military service he worked as an industrial engineering manager for Michelin Tire. He learned about film making by earning an MFA from the University of Southern California. Mr. Miller is on the ballot in: CO, NJ, and TN. In the 2000’s, Miller began taking an increasingly paleoconservative political stance. He claimed that Hollywood “ surreptitiously seeks to destroy our European-American heritage and our Christian-based traditional values, and replace them with values that debase these traditional values and elevate minorities as paragons of virtue and wisdom....Today’s motion pictures, in concert with other forms of mass media entertainment, are the greatest enemies to the well-being of our progeny and the future of our country.” Miller states that he "doesn't like" interracial marriage; however, he does not support outlawing interracial marriage, either. Miller has denied being anti-Semitic, instead claiming that he merely opposes "favoritism" granted to Jews in the film industry. He also opposes illegal immigration and what he refers to as "wide open borders" in the United States. The American Third Position Party (A3P) is a third positionist American political party which promotes white supremacy. It was officially launched in January 2010 (although in November 2009 it filed papers to get on a ballot in California) partially to channel the right-wing populist resentment engendered by the financial crisis of 2007–2010 and the policies of the Obama administration and defines its principal mission as representing the political interests of white Americans. The party takes a strong stand against immigration and globalization, and strongly supports an anti-interventionist foreign policy. Although the party does not support labor unions, they do strongly support the labor rights of the American working class on a platform of placing American workers first over illegal immigrant workers and banning of overseas corporate relocation of American industry and technology Third Position or Third Alternative refers to a revolutionary nationalist political position that emphasizes its opposition to both communism and capitalism. Advocates of Third Position politics typically present themselves as "beyond left and right", instead claiming to syncretize radical ideas from both ends of the political spectrum Learn more about Merlin Miller and American Third Position Party on Wikipedia.

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June 23, 1983: First Successful Test of the Domain Name System [Geek History]

- by Jason Fitzpatrick

Nearly 30 years ago the first Domain Name System (DNS) was tested and it changed the way we interacted with the internet. Nearly impossible to remember number addresses became easy to remember names. Without DNS you’d be browsing a web where numbered addresses pointed to numbered addresses. Google, for example, would look like http://209.85.148.105/ in your browser window. That’s assuming, of course, that a numbers-based web every gained enough traction to be popular enough to spawn a search giant like Google. How did this shift occur and what did we have before DNS? From Wikipedia: The practice of using a name as a simpler, more memorable abstraction of a host’s numerical address on a network dates back to the ARPANET era. Before the DNS was invented in 1983, each computer on the network retrieved a file called HOSTS.TXT from a computer at SRI. The HOSTS.TXT file mapped names to numerical addresses. A hosts file still exists on most modern operating systems by default and generally contains a mapping of the IP address 127.0.0.1 to “localhost”. Many operating systems use name resolution logic that allows the administrator to configure selection priorities for available name resolution methods. The rapid growth of the network made a centrally maintained, hand-crafted HOSTS.TXT file unsustainable; it became necessary to implement a more scalable system capable of automatically disseminating the requisite information. At the request of Jon Postel, Paul Mockapetris invented the Domain Name System in 1983 and wrote the first implementation. The original specifications were published by the Internet Engineering Task Force in RFC 882 and RFC 883, which were superseded in November 1987 by RFC 1034 and RFC 1035.Several additional Request for Comments have proposed various extensions to the core DNS protocols. Over the years it has been refined but the core of the system is essentially the same. When you type “google.com” into your web browser a DNS server is used to resolve that host name to the IP address of 209.85.148.105–making the web human-friendly in the process. Domain Name System History [Wikipedia via Wired] What is a Histogram, and How Can I Use it to Improve My Photos?How To Easily Access Your Home Network From Anywhere With DDNSHow To Recover After Your Email Password Is Compromised

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Simulating smooth movement along a line after calculating a collision containing a restitution of zero in 2D

- by Casey

[for tl;dr see after listing] //...Code to determine shapes types involved in collision here... //...Rectangle-Line collision detected. if(_rbTest->GetCollisionShape()->Intersects(*_ground->GetCollisionShape())) { //Convert incoming shape to a line. a2de::Line l(*dynamic_cast<a2de::Line*>(_ground->GetCollisionShape())); //Get line's normal. a2de::Vector2D normal_vector(l.GetSlope().GetY(), -l.GetSlope().GetX()); a2de::Vector2D::Normalize(normal_vector); //Accumulate forces involved. a2de::Vector2D intermediate_forces; a2de::Vector2D normal_force = normal_vector * _rbTest->GetMass() * _world->GetGravityHandler()->GetGravityValue(); intermediate_forces += normal_force; //Calculate final velocity: See [1] double Ma = _rbTest->GetMass(); a2de::Vector2D Ua = _rbTest->GetVelocity(); double Mb = _ground->GetMass(); a2de::Vector2D Ub = _ground->GetVelocity(); double mCr = Mb * _ground->GetRestitution(); a2de::Vector2D collision_velocity( ((Ma * Ua) + (Mb * Ub) + ((mCr * Ub) - (mCr * Ua))) / (Ma + Mb)); //Calculate reflection vector: See [2] a2de::Vector2D reflect_velocity( -collision_velocity + 2 * (a2de::Vector2D::DotProduct(collision_velocity, normal_vector)) * normal_vector ); //Affect velocity to account for restitution of colliding bodies. reflect_velocity *= (_ground->GetRestitution() * _rbTest->GetRestitution()); _rbTest->SetVelocity(reflect_velocity); //THE ULTIMATE ISSUE STEMS FROM THE FOLLOWING LINE: //Move object away from collision one pixel to prevent constant collision. _rbTest->SetPosition(_rbTest->GetPosition() + normal_vector); _rbTest->ApplyImpulse(intermediate_forces); } Sources: (1) Wikipedia: Coefficient of Restitution: Speeds after impact (2) Wikipedia: Specular Reflection: Direction of reflection First, I have a system in place to account for friction (that is, a coefficient of friction) but is not used right now (in addition, it is zero, which should not affect the math anyway). I'll deal with that after I get this working. Anyway, when the restitution of either object involved in the collision is zero the object stops as required, but if movement along the same direction (again, irrespective of the friction value that isn't used) as the line is attempted the object moves as if slogging through knee deep snow. If I remove the line of code in question and the object is not push away one pixel the object barely moves at all. All because the object collides, is stopped, is pushed up, collides, is stopped...etc. OR collides, is stopped, collides, is stopped, etc... TL;DR How do I only account for a collision ONCE for restitution purposes (BONUS: but CONTINUALLY for frictional purposes, to be implemented later)

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How would I achieve diablo like 2D isometric projection?

- by Darestium

Good day, I am in the process of coming up with an idea for a game, and I would like it to be isometric like Diablo. The problem is I have no idea how it achieves the effect of height like in the following screenshot (on the columns): http://upload.wikimedia.org/wikipedia/en/thumb/2/20/Diabloscreen.jpg/350px-Diabloscreen.jpg but whatever the case, I'm sure it is going to be harder to achieve then creating a traditional isometric game, but any ideas regarding the topic would be greatly appreciated.

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Is it okay to call exception-triggered debugging "post-mortem debugging"?

- by cool-RR

I heard the term "post-mortem debugging", and Wikipedia says it's debugging done after the program has crashed. I often debug Python apps using a debugger that stops execution once an important-enough exception has been raised. Then I can use the debug probe to investigate. Does this count as "post-mortem debugging"? Because the program doesn't really crash. EDIT: If the answer is no, then what name would you use for the kind of debugging that I described?

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List of Open Source Java Games for Android

- by BluFire

I'm wondering if there are any more opensource games than the ones that you can plainly see when you search a list of open source games for android on google. Such as, is there a good website that has compiled open source games? I don't want an answer of "go google it" or "en.wikipedia.org/wiki/List_of_open_source_Android_applications" it gets really annoying on posts when people just give lazy answers.

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OOP vs Frameworks (DRY, Organisation, Readability)

- by benhowdle89

In terms of organisation, code-readability and DRY programming, which, between OOP and Frameworks shows more of these 3 attributes? I'm aware that inline, procedural coding is viewed by many as a thing of the past, so which is the best route to take for these two? Just to clarify what i mean by OOP and frameworks From Wikipedia: Object-oriented programming (OOP) is a programming paradigm In computer programming, a software framework is an abstraction in which common code providing generic functionality can be selectively overridden or specialized by user code, thus providing specific functionality

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My schoolmates are playing too much and talk loudly, what should I do ? report them ? [closed]

- by jokoon

I'm a in a private game programming school class (there are also 3D/art classes in the school), and at least half or two third of the 12 people in my class play at various games (Age of Empires, web games, online card games, etc). They are talking quite loudly on top of that, and I'm getting hard times trying to concentrate: it feels like I'm in a cybercafe full of teenagers. I don't know if I have Hyperacusis (http://en.wikipedia.org/wiki/Hyperacusis),

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What do you call this { character?

- by John Isaacks

When talking to another programmer I would refer to ( and ) as parentheses. I would refer to [ and ] as brackets. What do you refer to { and } as? I checked the wikipedia article and there were several names listed: curly brackets squiggly brackets definite brackets swirly brackets birdie brackets Scottish brackets squirrelly brackets braces gullwings Is there a term commonly used within programmers to identify these characters?

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