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• What makes Erlang suitable for cloud applications?

  - by Duncan

  We are starting a new project and implementing on our corporations's instantiation of an openstack cloud (see http://www.openstack.org/). The project is security tooling for our corporation. We currently run many hundreds of dedicated servers for security tools and are moving them to our corporations instantiation of openstack. Other projects in my company currently use erlang in several distributed server applications, and other Q/A point out erlang is used in several popular cloud services. I am trying to convince others to consider where it might be applicable on our project. What are erlang's strengths for cloud programming? Where are areas it is particularly appropriate to use erlang?

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• On-line Based Conferencing For Admin Panel

  - by Tim Marshall

  Working on my admin panels work station section which will allow the admin to use simple office tools such as word editors, calculators and whatnot. Under this section of the admin panel, I would like to add a conferencing feature which will allow any administrator to connect with another administrator 1-2-1 under the 1-2-1 Conferencing section, or to join a meeting under 'live meeting' section. Upon my search for on-line based, I found there are all these, what seem to be great applications out there, however not all of them are on-line based, and come with a price! I would like to a purely on-line based conferencing/meeting/1-2-1 feature which will allow administrators to communicate via text or sound, stream their video, share their screen and sending of files. I know this sounds like a big feature, and I am not asking for someone to answer by programming one for my website! Does anyone know my best solution to progress to having this feature on my website, any tutorials or free to use, free to modify web plugins? Thank you for your help, Best Regards, Tim

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• Ouya / Android : button mapping biwise

  - by scorvi

  I am programming a game with the Gameplay3d Engine. But the Android site has no gamepad support and that is what I need to port my game to Ouya. So I implemented a simple gamepad support and it supports 2 gamepads. So my problem is that I put the button stats in a float array for every gamepad. But the Gameplay3d engine saves their stats in a unsigned int _buttons variable. It is set with bitwise operations and I have no clue how to translate my array to this.

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• Learning C, Lisp, and UNIX from Ground Up

  - by hunterc

  A friend and I are trying to learn traditional programming from the ground up. We both do web stuff primarily but want to expand to more system related things. We have found a ton of resources but looking for a road map of sorts. We are planning on using SICP to learn Lisp(scheme). Don't really know where to from there. As for C, we figured we'd start with K&R, then do OOC, and sprinkle in Operating Systems Design and Implementation and kind of learn UNIX as we go. I'd really appreciate suggestions on filling in the gaps, reordering things, or just advice in general.

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• What do you look for when debugging deadlocks?

  - by Michael K

  Recently I've been working on projects that heavily use threading. I think that I'm OK at designing them; use stateless design as much as possible, lock access to all resources that more than one thread needs, etc. My experience in functional programming has helped that immensely. However, when reading other people's thread code, I get confused. I am debugging a deadlock right now, and since the coding style and design are different from my personal style, I am having a difficult time seeing potential deadlock conditions. What do you look for when debugging deadlocks?

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• String Formatting with concatenation or substitution

  - by Davio

  This is a question about preferences. Assume a programming language offers these two options to make a string with some variables: "Hello, my name is ". name ." and I'm ". age ." years old." StringFormat("Hello, my name is $0 and I'm $1 years old.", name, age) Which do you prefer and why? I have found myself using both without any clear reason to pick either. Considering micro-optimizations is not within the scope of this question. Localization has been mentioned as a reason to go with option #2 and I think it's a very valid reason and deserves to be mentioned here. However, would opinions differ based on aesthetic viewpoints?

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• Trip Report: Scottsdale Arizona Event Conference Planning

  Monday May 10th, 2010 represents my largest and best event to-date, that I have ever hosted. For the last seven years, I’ve grown a technical audience around Microsoft programming / developers in the Phoenix area. Some travel from California, New Mexico, and other parts of Arizona, but for the most part the crowd is local. In years past, this all day event has been as small as 300 folks, and as large as 500, and I’ve tried been to venues around the valley some better than others. This...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Free LINQPad is a great way to learn LINQ!

  - by CatherineRussell

  LINQPad is a great way to learn LINQ: it comes loaded with 500 examples from the book, C# 4.0 in a Nutshell.  There's no better way to experience the coolness of LINQ and functional programming. LINQPad is more than just a LINQ tool: it's an ergonomic C#/VB scratchpad that instantly executes any C#/VB expression, statement block or program with rich output formatting – the ultimate in dynamic development. Put an end to those hundreds of Visual Studio Console projects cluttering your source folder! Best of all, LINQPad standard edition is free and can run without installation (or with a low-impact setup). The executable is 3MB and is self-updating. To get it, go to: http://www.linqpad.net/

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• How do I install the driver for my Linksys AE1200 Wireless-N USB Adapter?

  - by Lewis Graham

  I recently downloaded Ubuntu from the main website with the hopes of dual booting it with Windows. While the operating system works, it says that I need to install a driver for my graphics card. When I type in my password the installation fails. I figure it is because I need Internet access. I tried to install my WiFi USB adapter with the installation disc but Ubuntu doesn't seem to run the setup when I click the exe. What are my available solutions as I would really like to use Ubuntu from my programming and Windows for my gaming needs? The name as read on the box is: Linksys AE1200 Wireless- N USB Adapter The description reads as such: ID 13b1:0039 Linksys (a comma messed up format) ID 046d:0a0b Logitech, Inc. ClearChat Pro USB (headset)

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• Cloudcel: Excel Meets the Cloud

  - by kaleidoscope

  Cloudscale  is launching Cloudcel Cloudcel is the first product that demonstrates the full power of integrated "Client-plus-Cloud" computing. You use desktop Excel in the normal way, but can also now seamlessly tap into the scalability and massive parallelism of the cloud, entirely from within Excel, to handle your Big Data. Building an app in Cloudcel is really easy – no databases, no programming. Simply drop building blocks onto the spreadsheet (in any order, in any location) and launch the app to the cloud with a single click. Parallelism, scalability and fault tolerance are automatic. With Cloudcel, you can process realtime data streams continuously, and get alerts pushed to you as soon as important events or patterns are detected ("Set it and forget it"). Cloudcel is offered as a pay-per-use cloud service – so no hardware, no software licenses, and no IT department required to set it up. Private cloud deployments are also available. Please find below link for more detail : http://billmccoll.sys-con.com/node/1326645 http://cloudcel.com/ Technorati Tags: Tanu

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• How much C/C++ knowledge is needed for Objective-C/iPhone development?

  - by BFree

  First, a little background. I'm a .Net developer (C#) and have over 5 years experience in both web development and desktop applications. I've been wanting to look into iPhone development for some time now, but for one reason or another always got side tracked. I finally have a potential project on the horizon, and I'm now going full steam ahead learning this stuff. My question is this: I haven't done any C/C++ programming since my schooling days, I've been living in managed land ever since. How much knowledge if any is needed to be successful as an iOS developer? Obviously memory management is something that I'll have to be conscious about (although with iOS 5 there seems to be something called ARC which should make my life easier), but what else? I'm not just talking about the C API (for example, in order to get the sin of a number, I call the sin() function), that's what Google is for. I'm talking about fundamental C/C++ idioms that the average C# developer is unaware of.

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• Is it possible for a good programmer to have never used version control?

  - by lortabac

  I am looking for an expert programmer to help solve a difficult situation. The interviews so far have been surprisingly disappointing. The best candidate so far is a very experienced programmer who has never used version control software. The problem in itself might not be too serious because it is something which can be learned in a short time. But there is a deeper aspect, which worries me: How is it possible to actively develop software for 10-15 years without ever needing version control? Is the fact itself of not looking for a solution to the problem of tracking changes a sign of a wrong attitude to programming?

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• building a website

  - by Ant

  A couple of my friends run a business and they asked me to build them a public website. It will only be used for information about the company with soe pictures. No transactions will be involved. Right now I work for a company where I build internal websites, and do alot of backend programming in C#. I understand html, css, jquery, etc. so I feel like I am completely capable of building a website for them. However, I do not know all the basic knowledge to building one. For example, where should we host the files, what type of security issues do I need to be aware of, what's the best software to use for developing websites (I use visual studio at work), where can I find some design techniques, etc. Any help is appreciated.

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• Rapid Application Development, good, bad or ugly?

  - by chrisw

  I have been working for such a shop for the past three years and I know deep down it cannot be like this everywhere. When I think of Rapid Application Development I immediately think programming without fore-thought. For example, when my company decides to come out with a new product, they don't do any type of relationship mapping, no ER diagrams, no round table discussions on expandability. No, the senior developer that ends up working on the product puts together a screen shot walk-through of the application to show to the client. Once the client signs off on the project work is underway by the senior developer. Now you have a senior developer (I use that term "senior" loosely) coding the application in under a week with no unit testing. Well I guess the good to this is it keeps programmers employed due to the enormous amount of unforeseen "features" in the newly created application. Have any of you dealt with a company like this? If you did how did you preserve your sanity?

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• What are some good, simple examples for queues?

  - by Michael Ekstrand

  I'm teaching CS2 (Java and data structures), and am having some difficulty coming up with good examples to use when teaching queues. The two major applications I use them for are multithreaded message passing (but MT programming is out of scope for the course), and BFS-style algorithms (and I won't be covering graphs until later in the term). I also want to avoid contrived examples. Most things that I think of, if I were actually going to solve them in a single-threaded fashion I would just use a list rather than a queue. I tend to only use queues when processing and discovery are interleaved (e.g. search), or in other special cases like length-limited buffers (e.g. maintaining last N items). To the extent practical, I am trying to teach my students good ways to actually do things in real programs, not just toys to show off a feature. Any suggestions of good, simple algorithms or applications of queues that I can use as examples but that require a minimum of other prior knowledge?

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• What's New in Visual Studio 2010 Languages

  - by Aamir Hasan

  What's New in Visual Basic 2010Describes new features in the Visual Basic language and Code Editor. The features include implicit line continuation, auto-implemented properties, collection initializers, and more.What's New in Visual C# 2010Describes new features in the C# language and Code Editor. The features include the dynamic type, named and optional arguments, enhanced Office programmability, and variance.What's New in Visual C++ 2010Describes new and revised features in Visual C++. The features include lambda expressions, the rvalue reference declarator, and the auto, decltype, and static_assert keywords.What's New in Visual F# 2010Describes the F# language, which is a language that supports functional programming for the .NET Framework.Reference:http://msdn.microsoft.com/en-us/library/bb386063%28VS.100%29.aspx

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• installing ubuntu 10.04 over top 11.04

  - by Alex

  im looking to install 10.04 over top the 11.04 partition, it wouldnt let. keeps giving me a "root file system not found" error ever time i manually select partition. (i have a win7 partition) 11.04 popped up after upgrade that my hardware isnt supported for unity. and i cant boot into it, hangs up on purple screen right after boot menu. if anyone can post a link to a how to guide or put it on here, would be great? im trying to take advantage of my nvidia geforce gt 120m (its a laptop) to play around with cuda/c++ programming!

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• Do reactive extensions and ETL go together?

  - by Aaron Anodide

  I don't fully understand reactive extensions, but my inital reading caused me think about the ETL code I have. Right now its basically a workflow to to perform various operations in a certain sequence based on conditions it find as it progresses. I can also imagine an event driven way such that only a small amount of imperative logic causes a chain reaction to occur. Of course I don't need a new type of programming model to make an event driven collaboration like that. Just the same I am wondering if ETL is a good fit for potentially exploring Rx further. Is my connection in a valid direction even? If not, could you briefly correct the error in my logic?

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• How can a new programmer impress the software engineer (boss)? [closed]

  - by Pablo

  Note 1/8/2011: As of this Monday, I'm the new software engineer. Turns out I did not impress the S.E., but ended impressing the CEO. See Joel, not everyone has to leave their Honda idling in front of the airport. =) Ashton, this one is for you buddy. Hi, I'm working at my first programming job. My boss is a very smart software engineer, and I feel like I have very little to offer compared to him. Problem is, he is always busy, and needs someone to help him out. I feel like I'm not good enough, but I still want to succeed. I want to be a great programmer. What can I do to impress him? Thank you.

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• Building my first ASP.NET WebForms application problem

  - by user1525474

  Hi I have recently started to learn C#/ASP.NET WebForms and after reading two books I thought I was ready to create my first web application. Problem is I could not have been more wrong. Although I am not quite a beginner as a programmer and have done some programming in Java (a Monopoly game), JavaScript (using jQuery), and PHP (create templates for WordPress), I never really created something that is database driven, and I can't seem to figure where to start. I am very confident in my HTML/CSS/jQuery skills, so that is not the problem. My end goal after becoming comfortable in ASP.NET WebForms is to learn MVC, ADO.NET, and the Entity Framework, and start a career as a .NET developer. I would like if someone could tell me some tutorials that build ASP.NET WebForms applications, such as a blog, so I can see what are the steps in creating an ASP.NET WebForms database driven application. I already have to projects in mind for ASP.NET. One is building a blog and the other building a job board.

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• Is having your own website important?

  - by Josh K

  How necessary or important is it? I try to keep a running list of blogs or sites to follow, but a lot of the time I pull up someone's profile and notice there isn't anything there. Is it really important? I understand are different levels of programming (from C/C++ system programmers to Rails and even Haskell and J) and not everyone works in a language easily worked with for web based applications. Not everything is web-centric, however with the advent of many popular and sometimes free services I don't think it's unreasonable to expect a majority of programmers to have a personal site.

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• Skynet Big Data Demo Using Hexbug Spider Robot, Raspberry Pi, and Java SE Embedded (Part 4)

  - by hinkmond

  Here's the first sign of life of a Hexbug Spider Robot converted to become a Skynet Big Data model T-1. Yes, this is T-1 the precursor to the Cyberdyne Systems T-101 (and you know where that will lead to...) It is demonstrating a heartbeat using a simple Java SE Embedded program to drive it. See: Skynet Model T-1 Heartbeat It's alive!!! Well, almost alive. At least there's a pulse. We'll program more to its actions next, and then finally connect it to Skynet Big Data to do more advanced stuff, like hunt for Sara Connor. Java SE Embedded programming makes it simple to create the first model in the long line of T-XXX robots to take on the world. Raspberry Pi makes connecting it all together on one simple device, easy. Next post, I'll show how the wires are connected to drive the T-1 robot. Hinkmond

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• When to use an Array vs When to use a Vector, when dealing with GameObjects?

  - by user32465

  I understand that from other answers, Arrays and Vectors are the best choices. Many on SE claim that Linked Lists and Maps are bad for video game programming. I understand that for the most part, I can use Arrays. However, I don't really understand exactly when to use Vectors over Arrays. Why even use Vectors? Wouldn't it be best if I simply always used an Array, that way I know how much memory my game needs? Specifically my game would only ever load a single "Map" area of tiles, such as Map[100][100], so I could very easily have an array of GameObjectContainer GameObjects[100][100], which would reserve an entire map's worth of possible gameobjects, correct? So why use a Vector instead? Memory is quite large on modern hardware.

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• Review before or after code commit, which is better?

  - by fifth

  Traditionally we performed code review before commit, I had an argument with my colleague today, who preferred code review after commit. First, here's some background, we got some experienced developers and we also got new hires with almost zero programming practice. we'd like to perform fast and short iterations to release our product. we all team members locate at same site. The advantages of code review before commit I've learned, mentor new hires try to prevent errors, failures, bad designs in early developing cycle learn from others knowledge backup if someone quits But I also got some bad experience, like low efficiency, some changes may be reviewed over days hard to balance speed and quality, especially for newbies some guy felt distrust As to post-review, I just knew little about this, but the most thing I worried about is the risk of losing control, people never review. Any opinions?

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• Finding a good University [closed]

  - by Liamh101

  I've currently been searching for good Universities to study Software Engineering or Computer Science at. The three Universities I've chosen so far are: Brighton University (This is my main pick so far) Plymouth Uni Manchester Metropolitan I would just like to know from people who have actually studied at these places to see if there all that there cracked up to be and I'm not going to be wasting up to four years of my life with a course that isn't very well taught. Would love to hear from people and if there are any Universities in the UK that you are/have studied at and are finding really good for learning Programming that would be nice too. Thanks!

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