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  • Places to share my new blog entry? [closed]

    - by TomasAlabes
    I started yesterday a tech blog called devhike and as my first entry I explained a palette behaviour made with RaphaelJS. I wanted to share the entry the tech people around the world, to see if they like it, find it useful, etc. I submitted the link to my post in dzone.com and hackernews which are the places from where I like to read tech articles, but I feel there should be other places where I could post my blog or entry too. If not, I feel my blog will never be read. Do you know any places or ways to be read?

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  • What is the formal definition of a meta package?

    - by kojiro
    There are several examples of packaging where an application package is built, named, described, even licensed, but contains only setup code and dependencies -- it has no first-class runtime software of its own. I would call this "meta-packaging". This seems to be particularly popular in the open-source world, including examples like kde-meta (Gentoo Portage), Plone, and I'm sure lots of others. I can see how it's a useful practice, but despite it existing as a practice, I couldn't find a formal definition of either "meta-packaging" or "meta-egg" (Python) in searching the web. Is that not the correct term? If it is, is it such common-sense that it needs no formal definition? If not, what is the correct way to put it?

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  • WF4 &ndash; It has suddenly got interesting

    - by MarkPearl
    I was at Teched two years ago when one of the Microsoft leads said there were three new area’s that we needed to pay attention to for development, namely: WPF WCF WF At the time I was just getting back into development work and had a look at WPF and immediately was sold on the approach. While I haven’t been to involved with WCF directly, I know that some of the guys in my dev team have been and that it too was a success. So what happened to WF? It seemed clunky, and all the demo’s that I saw of it left me scratching my head wondering how if it was going to be useful. Fast forward two years later and while I have had a brief look at WF4, I can immediately see areas where we can use the technology. Does that mean that I think WF4 is the bees knees? I don’t know enough about it yet to really have a solid opinion, but I do think that it is finally going in the right direction. A good introduction to WF4 can be found here.

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  • What modern alternatives to Numerical Recipes exist?

    - by Stewart
    In the past, the Numerical Recipes book was considered the gold standard reference for numerical algorithms. The earliest Fortran Edition was followed by editions in C and C++ and others, bringing it then more up-to-date. Through these, it provided reference code for the state-of-the-art algorithms of the day. Older editions are available online for free nowadays. Unfortunately, I think it is now mostly useful only as a historic tome. The "software engineering" practises seem to me to be outdated, and the actual content hasn't kept pace with the literature. What comprehensive yet approachable references should the modern programmer look at instead?

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  • How to enable hibernate on Ubuntu 13.10?

    - by mjwittering
    Something I usually do after installing Ubuntu is reactivate the hibernation function. I find it quite useful to function for the more energy concious. Typically, I'd complete the instructions in this tutorial for Ubuntu 12.04 and I'd be back in business. However, it does seem to work any more. Any suggestions? http://www.howtogeek.com/113923/how-to-re-enable-hibernate-in-ubuntu-12.04/ sudo gedit /etc/polkit-1/localauthority/50-local.d/com.ubuntu.enable-hibernate.pkla [Enable Hibernate] Identity=unix-user:* Action=org.freedesktop.upower.hibernate ResultActive=yes

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  • How do you properly word a Google search when you don't even have a solution in mind? [closed]

    - by Bruno Romaszkiewicz
    So, I'm stuck on a problem, looking for a solution, my rubber duck can't help me, my co-workers can't help me. Next natural step is research, right? Google can help me, He always can. Or so I'm told. My problem is, I never found much use for Google when looking for a programming solution, it's very useful for finding how to implement one, but when you don't even know where to start, how do you properly word a Google search? Is there any other option?

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  • The sign of a true manager is delegation (C# style)

    - by MarkPearl
    Today I thought I would write a bit about delegates in C#. Up till recently I have managed to side step any real understanding of what delegates do and why they are useful – I mean, I know roughly what they do and have used them a lot, but I have never really got down dirty with them and mucked about. Recently however with my renewed interest in Silverlight delegates came up again as a possible solution to a particular problem, and suddenly I found myself opening a bland little console application to just see exactly how far I could take delegates with my limited knowledge. So, let’s first look at the MSDN definition of delegates… A delegate declaration defines a reference type that can be used to encapsulate a method with a specific signature. A delegate instance encapsulates a static or an instance method. Delegates are roughly similar to function pointers in C++; however, delegates are type-safe and secure. Well, don’t you love MSDN for such a useful definition. I must give it credit though… later on it really explains it a bit better by saying “A delegate lets you pass a function as a parameter. The type safety of delegates requires the function you pass as a delegate to have the same signature as the delegate declaration.” A little more reading up on delegates mentions that delegates are similar to interfaces in that they enable the separation of specification and implementation. A delegate declares a single method, while an interface declares a group of methods. So enough reading - lets look at some code and see a basic example of a delegate… Let’s assume we have a console application with a simple delegate declared called AdjustValue like below… class Program { private delegate int AdjustValue(int val); static void Main(string[] args) { } } In a sense, all we have said is that we will be creating one or more methods that follow the same pattern as AdjustValue – i.e. they will take one input value of type int and return an integer. We could then expand our code to have various methods that match the structure of our delegate AdjustValue (remember the structure is int xxx (int xxx)) class Program { private delegate int AdjustValue(int val); private static int Dbl(int val) { return val * 2; } private static int AlwaysOne(int val) { return 1; } static void Main(string[] args) { } }  Above I have expanded my project to have two methods, one called Dbl and the other AlwaysOne. Dbl always returns double the input val and AlwaysOne always returns 1. I could now declare a variable and assign it to be one of those functions, like the following… class Program { private delegate int AdjustValue(int val); private static int Dbl(int val) { return val * 2; } private static int AlwaysOne(int val) { return 1; } static void Main(string[] args) { AdjustValue myDelegate; myDelegate = Dbl; Console.WriteLine(myDelegate(1).ToString()); Console.ReadLine(); } } In this instance I have declared an instance of the AdjustValue delegate called myDelegate; I have then told myDelegate to point to the method Dbl, and then called myDelegate(1). What would the result be? Yes, in this instance it would be exactly the same as me calling the following code… static void Main(string[] args) { Console.WriteLine(Dbl(1).ToString()); Console.ReadLine(); }   So why all the extra work for delegates when we could just do what we did above and call the method directly? Well… that separation of specification to implementation comes to mind. So, this all seems pretty simple. Let’s take a slightly more complicated variation to the console application. Assume that my project is the same as the one previously except that my main method is adjusted as follows… static void Main(string[] args) { AdjustValue myDelegate; myDelegate = Dbl; myDelegate = AlwaysOne; Console.WriteLine(myDelegate(1).ToString()); Console.ReadLine(); } What would happen in this scenario? Quite simply “1” would be written to the console, the reason being that myDelegate was last pointing to the AlwaysOne method before it was called. Make sense? In a way, the myDelegate is a variable method that can be swapped and changed when needed. Let’s make the code a little more confusing by using a delegate in the declaration of another delegate as shown below… class Program { private delegate int AdjustValue(InputValue val); private delegate int InputValue(); private static int Dbl(InputValue val) { return val()*2; } private static int GetInputVal() { Console.WriteLine("Enter a whole number : "); return Convert.ToInt32(Console.ReadLine()); } static void Main(string[] args) { AdjustValue myDelegate; myDelegate = Dbl; Console.WriteLine(myDelegate(GetInputVal).ToString()); Console.ReadLine(); } }   Now it gets really interesting because it looks like we have passed a method into a function in the main method by declaring… Console.WriteLine(myDelegate(GetInputVal).ToString()); So, what it the output? Well, try take a guess on what will happen – then copy the code and see if you got it right. Well that brings me to the end of this short explanation of Delegates. Hopefully it made sense!

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  • How does Lastpass recognize actual login?

    - by Pan.student
    We are currently working on simple school project using Codeigniter where we need login page. It would be very useful if Lastpass could recognise and save logins. We have several accounts with different roles and manual insert of login is pretty slow. So I was wondering what needs to be done and where in files (view, controller?) for Lastpass to work as it does on every website. For example this is our login form: <?php echo form_open('login'); ?> <input type="text" id="username" name="username"/> <input type="text" id="password" name="password"/> <input type="submit" value="Login"/> </form> Thanks for help. (could not create new tag "Lastpass" due to low reputation) [SOLVED] changed <input type="text" id="password" name="password"/> to <input type="password" id="password" name="password"/>

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  • Reboot only shuts down and doesn't actually boot again

    - by PherricOxide
    I'm running a fresh install of Ubuntu 12.04 Server on an abmx rack mount server. When I attempt to reboot with sudo shutdown -r now, the machine just shuts down and doesn't come back up without me manually pressing the power button. The output of last -x, runlevel (to lvl 2) 3.2.0-29-generic Wed Oct 31 14:32 - 14:37 (00:05) reboot system boot 3.2.0-29-generic Wed Oct 31 14:32 - 14:37 (00:05) shutdown system down 3.2.0-29-generic Wed Oct 31 14:30 - 14:32 (00:02) runlevel (to lvl 6) 3.2.0-29-generic Wed Oct 31 14:30 - 14:30 (00:00) This appears to show that the system rebooted, but it went dark (no power lights, BIOS, etc) and I had to go press the power button in order to make it boot back up. The machine does have some sort of Intel Boot Agent that usually appears before the BIOS, I'm wondering if it could be causing this. I'm not sure what information is useful for debugging this, but I put the output of lshw in http://pastebin.com/mBy72kTQ

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  • Dell M6800 with Windos 8.1 on part-1, cannot run if Ubuntu and Fedora are 2nd and 3rd OSsen?

    - by user289334
    On a Dell M6800 machine that has Windows 8 pre-installed, I upgraded to 8.1, then I loaded Ubuntu 14.04 then Fedora 20 the only way I could, that is in "Legacy" BIOS Mode. BTW the Ubuntu install was unable to complete but Fedora did, and left all working, 2 bootable OSsen, with Grub2 from Fedora doing the boots, but Windows 8.1 is now "invisible". I have run Boot-Repair but info is not useful. It tells me to switch to UEFI which, on M6800, doesn't work with this (too long-winded to explain why here). I need to have the Grub2 configs "see" the original Windows 8.1 partition, with BIOS switched to "Legacy". BTW various posts have said make switch to UEFI to boot from, say, USB-stick or DVD; this is wrong, you can't - UEFI mode only allows boot from the Windows partition, which it says has a Windows 8.1 on it, which doesn't boot. Basically, if you have actually succeeded in loading Ubuntu 14.04 or Fedora 20 on an M6800, which comes with pre-loaded Windows 8, you will know how I fix this.

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  • Is Unity's Random seeded automatically?

    - by Lohoris
    I seem to recall Unity's Random is automatically seeded; checking the documentation it doesn't say it outright, but a certain interpretation of their words might seem to imply it. The seed is normally set from some arbitrary value like the system clock before the random number functions are used. This prevents the same run of values from occurring each time a game is played and thus avoids predictable gameplay. However, it is sometimes useful to produce the same run of pseudo-random values on demand by setting the seed yourself. (emphasis added)

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  • Friday Tips #34

    - by Chris Kawalek
    Happy Friday! I wanted to take the opportunity this week to not give out a tip per se, but to point you to a really fantastic white paper that you might have missed. It's called What It Takes to Deploy and Manage a Private Cloud with Oracle VM. The paper is filled with useful information and it's written in a really entertaining style, tackling the IT challenges of a friendly systems administrator named Dave. It gives a great overview of application-driven virtualization and covers Oracle VM, Oracle VM Templates, Oracle VM Storage Connect, and Oracle Enterprise Manager. Read the white paper What It Takes to Deploy and Manage a Private Cloud with Oracle VM. See you next week! -Chris 

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  • Looking for PHP/MySQL-based ad manager

    - by user359650
    Could you recommend based on your experience a PHP/MySQL-based admin interface for managing your website ads? In order to be really useful, such application should have: -basic CRM functionality to track who is providing the ads -multilingual multi country support: have the ability to specify for the same ad, different versions for multiple languages/countries -predefined ad formats (google Ads, flash ads...) and sizes with corresponding PHP helpers so as to insert in the HTML code the necessary markup to properly integrate the ad. Ideally if that application could be desgined for Zend Framework that would be awesome (but I think I'm dreaming at this point).

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  • Industry average percentage of dev salary spent on tooling? [on hold]

    - by RationalGeek
    I'm trying to budget for my dev shop and compare our budget items to industry expectations. I'm hoping to find some information on what percentage of a dev's salary is generally spent on tooling, both hardware and software. Where can I find such information? If instead there is a source that looks at raw dollars that is useful, too. I can extrapolate what I need from that. NOTE: Your anecdotal evidence from your own job will not be very helpful. I'm looking for industry average statistics from a credible source.

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  • How to configure ubuntu for lightweight low-memory usage?

    - by augustin
    I just upgraded an old, secondary computer to the latest Kubuntu (10.10). It seems the effort was a bit too much for the hardware and one 512MB memory module died. I tried to take it away, clean the connectors, put it back several times, but to no avail. Until such a time I can find a second hand DDR memory module, I am left with a meagre 256MB RAM, which is below the official requirements (384MB) to run Kubuntu/KDE. Indeed: the computer constantly swaps the memory, making everything painfully slow. Since Kubuntu is already installed and I use it on all my computers (and I want to keep KDE for when I really need it), how can I configure ubuntu to squeeze out every bit of unnecessary memory usage? This is a secondary computer but still very useful. We use it mostly for web browsing. A "lightweight" tag is missing.

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  • What's an acceptable "Avg. Page Load Time"?

    - by hawbsl
    Is there any industry rule of thumb for what's considered an unacceptable load time v. an OK one v. a blistering fast one? We're just reviewing some Google Analytics data and getting 0.74 Avg. Page Load Time reported. I guess that's OK. However it would be good if some meatier comparison data were available, or a blog post, or somewhere where there's some analysis of what speeds are generally being achieved by various kinds of sites. Any useful links to help someone interpret these speeds? If you Google it you just get a lot of results dealing with how to improve your speed. We're not at that stage yet.

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  • RTOS experience

    - by Subbu
    I have been working as an embedded software engineer on mostly 8 bit micro-controller firmware and desktop/mobile applications development for the past five years. My work on a WinCE project (in which I got introduced to .NET CF) was short lived. I did use core APIs for interrupt processing, peripheral communication, etc...but again, not exactly a pure RTOS environment. In order to get together more solid experience for growing more in the embedded field, I want to work more with RTOSes. Will buying an evaluation board with an RTOS and putting together a project at home be regarded as a good experience or will an online course be more useful? I am just not clear as to what will be regarded as good experience. Any suggestions or directions will greatly help me. I have a passion for the field but just a need a point in the right direction.

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  • SSIS Basics: Using the Execute SQL Task to Generate Result Sets

    The Execute SQL Task of SSIS is extraordinarily useful, but it can cause a lot of difficulty for developers learning SSIS, or only using it occasionally. What it needed, we felt, was a clear step-by-step guide that showed the basics of how to use it effectively. Annette Allen has once again cleared the fog of confusion. NEW! Take the stress out of .NET deploymentEliminate the risk in deploying manually to live systems using Deployment Manager, the new tool from Red Gate. Try it now.

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  • Who owns the code, who owns the algorithm, who owns the idea?

    - by Vorac
    This question got me thinking what products of the programming effort belong to the employer, and what don't. The two extremes are (0) the code - it apparently belongs to the employer and (1) the learned personal and technical skills. But what is in between? Who owns the pseudocode/algorithm? Who owns the general idea of the algorithm? Who owns the know-how that such an algorithm may serve some useful purpose (e.g. on this site questions are values, as well as answers)? Also: Who owns an idea on the web?

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  • What books/references are recommended on the subject of planning and developing efficient web sites [closed]

    - by Shakil
    Once I visited a site containing videos; a well-known web developer creating a site from scratch via planning(paper, software), management, designing then development. I bookmarked the site but unable to find it now. My question is : How to do web-development effectively? What books or videos are recommended ???(I tried google but unable to find useful books or videos). I want to learn how people does it. Can you share resources(books, videos, links) about this... Thanks in advance.. Note: I created a job site for my university project. It gave me huge pain. Thats why I want to learn efficient way. I know html, css, javascript, jquery, php[learning(mvc and framework not yet completed)], phpmyadmin.

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  • HTG Explains: How Hackers Take Over Web Sites with SQL Injection / DDoS

    - by Jason Faulkner
    Even if you’ve only loosely followed the events of the hacker groups Anonymous and LulzSec, you’ve probably heard about web sites and services being hacked, like the infamous Sony hacks. Have you ever wondered how they do it? There are a number of tools and techniques that these groups use, and while we’re not trying to give you a manual to do this yourself, it’s useful to understand what’s going on. Two of the attacks you consistently hear about them using are “(Distributed) Denial of Service” (DDoS) and “SQL Injections” (SQLI). Here’s how they work. Image by xkcd HTG Explains: How Hackers Take Over Web Sites with SQL Injection / DDoS Use Your Android Phone to Comparison Shop: 4 Scanner Apps Reviewed How to Run Android Apps on Your Desktop the Easy Way

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  • Restoring Grub after Kubuntu installation

    - by justquestions
    I installed Kubuntu on top of my existing Ubuntu 12.04 (64 bit) installation. During Kubuntu installation, I chose lightdm as my default display manager (instead of kdm). Now after rebooting, the Grub has a new color (gray instead of default purplish) and the screen while booting is gray (instead of purplish). I am curious if it is possible to change this grub behavior without removing Kubuntu. I did find a lot of discussion about modifying grub themes but they were not very useful because I do not know what is the default unity grub theme. I did reinstall grub but it didn't change anything. I tried the Grub Customizer but couldn't succeed. Thanks in advance!

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  • Some Early Considerations

    - by Chris Massey
    Following on from my previous post, I want to say "thank you" to everyone who has got in touch and got involved – you are pioneers! An update on where we are right now: paper prototypes v1 To be more specific, we’ve picked two of the ideas that seem to have more pros than cons, turned them into Balsamiq mockups, and are getting them fleshed out with realistic content. We’ll initially make these available to the aforementioned pioneers (thank you again), roll in the feedback, and then open up to get more data on what works and what doesn’t. If you’ve got any questions about this (or what we’re working on right now), feel free to ask me in the comments below. I’ve had a few people express an interest in the process we’re going through, and I’m more than happy to share details more frequently as we go along – not least because you, dear reader, will help us stay on target and create something Good. To start with, here’s a quick flashback to bring you all up to speed. A Brief Retrospective As you may already know, we’re creating a new publishing asset specifically focused on providing great content for web developers. We don’t yet know exactly what this thing will look like, or exactly how it will work, but we know we want to create something that is useful different. For my part, I’m seriously excited at the prospect of building a genuinely digital publishing system (as opposed to what most publishing is these days, which is print-style publishing which just happens to be on the web). The main challenge at this point is working out our build-measure-assess loop to speed up our experimental turn-around, and that’ll get better as we run more trials. Of course, there are a few things we’ve been pondering at this early conceptual stage: Do we publishing about heterogeneous technology stacks from day 1, or do we start with ASP.NET (which we’re familiar with) & branch out later? There are challenges with either approach. What publishing "modes" are already being well-handled? For example, the likes of Pluralsight, TekPub, and Treehouse have pretty much nailed video training (debate about price, if you like), and unless we think we can do it faster / better / cheaper (unlikely, for the record), we should leave them to it. Where should we base whatever we create? Should we create a completely new asset under a new name, graft something onto Simple-Talk (like the labs), or just build something directly into Simple-Talk? It sounds trivial, but it does have at least some impact on infrastructure and what how we manage the different types of content we (will) have. Are there any obvious problems or niches that we think could address really well, or should we just throw ideas out and see what readers respond to? What kind of users do we want to provide for? This actually deserves a little bit of unpacking… Why are you here? We currently divide readers into (broadly) the categories: Category 1: I know nothing about X, and I’d like to learn about it. Category 2: I know something about X, but I’d like to learn how to do something specific with it. Category 3: Ah man, I have a problem with X, and I need to fix it now. Now that I think about it, I might also include a 4th class of reader: Category 4: I’m looking for something interesting to engage my brain. These are clearly task-based categorizations, and depending on which task you’re performing when you arrive here, you’re going to need different types of content, or will have specific discovery needs. One of the questions that’s at the back of my mind whenever I consider a new idea is “How many of the categories will this satisfy?” As an example, typical video training is very well suited to categories 1, 2, and 4. StackOverflow is very well suited to category 3, and serves as a sign-posting system to the rest. Clearly it’s not necessary to satisfy every category need to be useful and popular, but being aware of what behavior readers might be exhibiting when they arrive will help us tune our ideas appropriately. < / Flashback > We don’t have clean answers to most of these considerations – they’re things we’re aware of, and each idea we look at is going to be best suited to a different mix of the options I’ve described. Our first experimental loop will be coming full circle in the next few days, so we should start to see how the different possibilities vary between ideas. Free to chime in with questions and suggestions about anything I’ve just brain-dumped, or at any stage as we go along. If you see anything that intrigued or enrages you, or just have an idea you’d like to share, I’d love to hear from you.

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  • Develop JavaScript API to expose web services [closed]

    - by Apps
    We are planning to develop a JavaScript API to expose some of our J2EE based services. We are doing this keeping Google Maps API in mind. Can someone please suggested where we should start and the approaches that we need to follow to create a useful and extensible JavaScript API? These are the things that we are considering to achieve. It should be very simple for others to use our API. We feel Google Maps API is like that. We should be able to release the updates of the APIs without affecting the existing implementations. We should have enough security measures so that not all can use these services. Please suggest us if there are any books that can guide us through. Any suggestion will be greatly helpful for us. Please let me know if my question is not clear or you need any further information.

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  • Which specific programming activities do women, on average, perform better than men? [closed]

    - by blueberryfields
    Following a recent discussion with female associates in hiring positions for software development/engineering positions, I found out that this kind of information would be incredibly useful to helping make sure that the workforce shows a gender balance. So I went looking. I've found various literature speaking about risk-taking behaviour and patterns, and other statistical differences between men and women when it comes to work performance. See for example this article related to hedge fund management. I have yet to see any such comparison in the computing field. To restate the question: Which specific programming activities do women, on average, perform better than men? Please back up your answers with specific details, preferably by linking to relevant research or, failing that, explaining what you're basing the information on.

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