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  • Chapter 3: JavaFX Primer3

    JavaFX Script blends declarative programming concepts with object orientation. This provides a highly productive, yet flexible and robust, foundation for applications. However, with this flexibility comes responsibility from the developer.

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  • Which of these courses are the hardest and why?

    - by DSL Client
    Which of these courses are the hardest and why? What should I watch out for? Probability and Statistics for Computer Science Introduction to Software Engineering Data Structures and Algorithms Operating Systems Introduction to Theoretical Computer Science System Hardware Advanced Program Design with C++ Information Systems Security Computer Architecture Databases Web Programming Computer Graphics Digital System Design

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  • Are there any good books on how to design software?

    - by nc01
    I've been programming for a while and I think I write clean code. But I do this by hacking away, tinkering and testing things until I feel good about the functionality, and then coming in and refactoring, refactoring, refactoring. I tend to write mostly in PHP, Java, and C. Are there any good books that will help me learn to visualize things better and not code everything as if in an infinite REPL loop? Thanks.

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  • Virtualization of the human race interactivity and beyond. [on hold]

    - by J Michael Caldwell
    We are in the processes of attempting this lofty goal. It requires multidiscipline advancements over long periods of time. Achieving this requires a great deal of science advancement including major programming and algorithm developments. These requirements are going to be ongoing and will be required well into the next century. Does anyone know of individuals or feel themselves that they might be knowledgable or interested in this endeavor? Details upon request. Thanks Michael

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  • How can I get gcc to write a file larger than 2.0 GB?

    - by fred.bear
    I wanted to recompile 'xxd' (written in C), so I installed CodeBlocks as the IDE. All seemed to go well unil I discovered that I couldn't write past the 2.0 GB barrier... I've read that 'gcc' needs to be recompiled... (That sounds a bit dramatic..) I've read that I can use 'fread64()' instead of 'fread()' ... (didn't work) I've read something about a compiler options (?)... but I get lost at that point? I am surprised that it didn't work out-of-the-box, as I thought the 2.0 GB limit was ancient history as far as defaults go ... wrong again?:( My OS is 32-bit, on 32-bit hardware. The gcc version report in as: gcc (Ubuntu 4.4.3-4ubuntu5) 4.4.3 Is there a simple way around this issue? PS.. I was fascinated by the WARNINGS: section of 'info xxd' (..only on Linux ;)

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  • Is there an application or method to log of data transfers?

    - by Gaurav_Java
    My friend asked me for some files that I let him take from my system. I did not see he doing that. Then I was left with a doubt: what extra files or data did he take from my system? I was thinking is here any application or method which shows what data is copied to which USB (if name available then shows name or otherwise device id) and what data is being copied to Ubuntu machine . It is some like history of USB and System data. I think this feature exists in KDE This will really useful in may ways. It provides real time and monitoring utility to monitor USB mass storage devices activities on any machine.

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  • Print jobs to Epson Stylus Photo 640 all stopped after upgrade 10.04 to 12.04

    - by Tessa Sayers
    Upgraded from Ubuntu 10.04 to 12.04 on 19th oct 2012. Now all print jobs end up in the print queue with the label "Stopped". Reinstalled the printer driver - it is gutenberg 5.2.8 pre1. Looking at "http://localhost:631/jobs" shows an error message by each stopped job as follows:"The PPD version (5.2.5 Simplified) is not compatible with Gutenprint 5.2.8-pre1." Found a long bug-fixing history in bugs.launchpad.net which seem to imply that this problem has been fixed. It seems to be a problem with the installation not updating the ppd files. Is there any workaround to fix this problem?

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  • what is the Best way to learn object oriented principles

    - by Mike
    I am interesed in OOP principles and i found lots of documentations and books about it, for instance in C++, Java, .NET, PHP and so on, but if i only want to learn OOP principle, differences and not in language, what can i do? i want a good documentation, not just like a whole book about something except OOP :) specific answers, how it works, main features, pictures, or videos, or forum, or even stack... in every time I began studying i read a whole history of programming, computer science, software development and bla bla... i need specific answers, if it is possible i really need to learn, i need examples and exercises thanks in advance

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  • Should i continue my self-taught coding practice or learn how to do coding professionally?

    - by G1i1ch
    Lately I've been getting professional work, hanging out with other programmers, and making friends in the industry. The only thing is I'm 100% self-taught. It's caused my style to extremely deviate from the style of those that are properly trained. It's the techniques and organization of my code that's different. It's a mixture of several things I do. I tend to blend several programming paradigms together. Like Functional and OO. I lean to the Functional side more than OO, but I see the use of OO when something would make more sense as an abstract entity. Like a game object. Next I also go the simple route when doing something. When in contrast, it seems like sometimes the code I see from professional programmers is complicated for the sake of it! I use lots of closures. And lastly, I'm not the best commenter. I find it easier just to read through my code than reading the comment. And most cases I just end up reading the code even if there are comments. Plus I've been told that, because of how simply I write my code, it's very easy to read it. I hear professionally trained programmers go on and on about things like unit tests. Something I've never used before so I haven't even the faintest idea of what they are or how they work. Lots and lots of underscores "_", which aren't really my taste. Most of the techniques I use are straight from me, or a few books I've read. Don't know anything about MVC, I've heard a lot about it though with things like backbone.js. I think it's a way to organize an application. It just confuses me though because by now I've made my own organizational structures. It's a bit of a pain. I can't use template applications at all when learning something new like with Ubuntu's Quickly. I have trouble understanding code that I can tell is from someone trained. Complete OO programming really leaves a bad taste in my mouth, yet that seems to be what EVERYONE else is strictly using. It's left me not that confident in the look of my code, or wondering whether I'll cause sparks when joining a company or maybe contributing to open source projects. In fact I'm rather scared of the fact that people will eventually be checking out my code. Is this just something normal any programmer goes through or should I really look to change up my techniques?

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  • Contiguous Time Periods

    It is always more efficient to maintain referential integrity by using constraints rather than triggers. Sometimes it isn't obvious how to do this. Until a recent idea by Alex Kuznetsov, the history table presented problems for checking data that were difficult to solve with constraints. Joe Celko explains. Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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  • Facebook likes reset after moving to HTTPS (URL manually set in script, though)

    - by aarondicks
    Hi fellow Facebook developers. I've got a question regarding the Facebook like button. We worked on a piece recently that embeds a number of social share buttons (please see the source code below or here on Harvey Water Softeners' website) When the piece was released, it was on HTTP, and received over 2k likes (the URL 'slug' hasn't changed at all). The site was recently migrated to permanent-on HTTPS, and the like data has been reset, and we've been left with 50 new, recent likes. If you see in the source code, the URL is set explicitly to like the HTTP version, which I believe to be correct. Can anyone help me work out what's happened here? Here's the HTML bit of the like button: <div class="fb-like" data-href="http://www.harveywatersofteners.co.uk/history-interior-design" data-layout="box_count" data-action="like" data-show-faces="false" data-share="false"></div> Thanks in advance Aaron

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  • Are there any good Java/JVM libraries for my Expression Tree architecture?

    - by Snuggy
    My team and I are developing an enterprise-level application and I have devised an architecture for it that's best described as an "Expression Tree". The basic idea is that the leaf nodes of the tree are very simple expressions (perhaps simple values or strings). Nodes closer to the trunk will get more and more complex, taking the simpler nodes as their inputs and returning more complex results for their parents. Looking at it the other way, the application performs some task, and for this it creates a root expression. The root expression divides its input into smaller units and creates child expressions, which when evaluated it can use to build it's own result. The subdividing process continues until the simplest leaf nodes. There are two very important aspects of this architecture: It must be possible to manipulate nodes of the tree after it is built. The nodes may be given new input values to work with and any change in result for that node needs to be propagated back up the tree to the root node. The application must make best use of available processors and ultimately be scalable to other computers in a grid or in the cloud. Nodes in the tree will often be updating concurrently and notifying other interested nodes in the tree when they get a new value. Unfortunately, I'm not at liberty to discuss my actual application, but to aid understanding a little bit, you might imagine a kind of spreadsheet application being implemented with a similar architecture, where changes to cells in the table are propagated all over the place to other cells that need the result. The spreadsheet could get so massive that applying multi-core multi-computer distributed system to solve it would be of benefit. I've got my prototype "Expression Engine" working nicely on a single multi-core PC but I've started to run into a few concurrency issues (as expected because I haven't been taking too much care so far) so it's now time to start thinking about migrating the Engine to a more robust library, and that leads to a number of related questions: Is there any precedent for my "Expression Tree" architecture that I could research? What programming concepts should I consider. I realise this approach has many similarities to a functional programming style, and I'm already aware of the concepts of using futures and actors. Are there any others? Are there any languages or libraries that I should study? This question is inspired by my accidental discovery of Scala and the Akka library (which has good support for Actors, Futures, Distributed workloads etc.) and I'm wondering if there is anything else I should be looking at as well?

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  • Could not write bytes: broken pipe - looking for log of removed packages

    - by user288987
    I have a dual boot system with 12.04 and windows 7. Ubuntu worked fine yesterday but this morning upon boot I get subject. Searched the forums and unsuccessful with recovery. I tried sudo gedit /var/log/apt/history.log to see the log of removed packages, but get the following... ** (gedit:976): WARNING **: Command line 'dbus-launch --autolaunch=2d7d18532e9953bc8a2b852e00000007 --binary-syntax --close-stderr' exited with non-zero exit status 1: Autolaunch error: X11 initialization failed.\n Cannot open display: Run 'gedit --help' to see a full list of available command line options. Anyone have any suggestions for a fix? Please let me know if you require any additional information. Thanks! Mark

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  • ASP.NET Web Form Model with Partial Rendering and Events

    This article explains the Event based ASP.NET Web Form programming model for a web application with reference to partial rendering and AJAX asynchronous postback....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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  • I've had some free time at work during maintenance releases, but all I do is surf the Internet.

    - by hal10001
    I'm really having trouble with this, since it is the perfect opportunity to learn something new, begin a personal project... essentially do just about anything, but all I do is surf the Internet. I find that I don't want to look at anything programming related, and I'm seriously wondering if I'm letting boredom get the best of me, I'm depressed, or experiencing burnout? Any suggestions for how to go about taking back this unproductive time would be greatly appreciated.

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  • Why Is the Localhost IP 127.0.0.1?

    - by Jason Fitzpatrick
    Geeks the world over know their local host as 127.0.0.1, but why is that specific address, of all available addresses, reserved for the local host? Read on to delve into the history of local hosts. Image by GMPhoenix; available as wallpaper here. Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-drive grouping of Q&A web sites. 7 Ways To Free Up Hard Disk Space On Windows HTG Explains: How System Restore Works in Windows HTG Explains: How Antivirus Software Works

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  • Calculate pi to an accuracy of 5 decimal places?

    - by pgras
    In this message at point 18 I saw following programming question: Given that Pi can be estimated using the function 4 * (1 – 1/3 + 1/5 – 1/7 + …) with more terms giving greater accuracy, write a function that calculates Pi to an accuracy of 5 decimal places. So I know how to implement the given function and how to choose how "far" I should calculate, but how can I tell when I've reached the "accuracy of 5 decimal places" ?

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  • Are Promises/A a good event design pattern to implement even in synchronous languages like PHP?

    - by Xeoncross
    I have always kept an eye out for event systems when writing code in scripting languages. Web applications have a history of allowing the user to add plugins and modules whenever needed. In most PHP systems you have a global/singleton event object which all interested parties tie into and wait to be alerted to changes. Event::on('event_name', $callback); Recently more patterns like the observer have been used for things like jQuery. $(el).on('event', callback); Even PHP now has built in classes for it. class Blog extends SplSubject { public function save() { $this->notify(); } } Anyway, the Promises/A proposal has caught my eye. It is designed for asynchronous systems, but I'm wondering if it is also a good design to implement now that even synchronous languages like PHP are changing. Combining Dependency Injection with Promises/A seems it might be the best combination for handling events currently.

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  • Are "skip deltas" unique to svn?

    - by echinodermata
    The good folks who created the SVN version control system use a structure they refer to as "skip deltas" to store the revision history of files internally. A revision is stored as a delta against an earlier revision. However, revision N is not necessarily stored as a delta against revision N-1, like this: 0 <- 1 <- 2 <- 3 <- 4 <- 5 <- 6 <- 7 <- 8 <- 9 Instead, revision N is stored as a delta against N-f(N), where f(N) is the greatest power of two that divides N: 0 <- 1 2 <- 3 4 <- 5 6 <- 7 0 <------ 2 4 <------ 6 0 <---------------- 4 0 <------------------------------------ 8 <- 9 (Superficially it looks like a skip list but really it's not that similar - for instance, skip deltas are not interested in supporting insertion in the middle of the list.) You can read more about it here. My question is: Do other systems use skip deltas? Were skip deltas known/used/published before SVN, or did the creators of SVN invent it themselves?

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  • Ubuntu 12.04 upgrade (from 11.10) removed all packages installed

    - by Jagmal
    I upgraded from Ubuntu 11.10 to 12.04 using bootable USB. After upgrade, all non-default packages from 11.10 are gone. For ex, I did not have Chromium, Eclipse etc. Although, I could see these in the History in the "Ubuntu Software Center". Is there any way I can retrieve all these packages (even reverting back to 11.10 is also fine with me)? What could be a possible reason for this (We plan to upgrade a few more machines)? During the upgrade process, I had unchecked the box which asked permission to look online for upgrade/packages. Co

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  • Keyword Usage For Maximum SEO

    After analyzing and ranking your keywords for profitability you now need to know what to do with them. The keywords you choose are only useful if you use them correctly. You don't need to know computer programming or even how the search engines work, just follow these simple tips and you will get the maximum search engine optimization benefit from your keywords.

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  • Microsoft Press deal of the Day 11/October/2013 - F# for C# Developers

    - by TATWORTH
    Originally posted on: http://geekswithblogs.net/TATWORTH/archive/2013/10/11/microsoft-press-deal-of-the-day-11october2013---f-for.aspxToday, 11/October/2013, O'Reilly on behalf of Microsoft Press are offering 50% off F# for C# developers. Just remember to use the code MSDEAL when you check out. "Extend your C# skills to F#—and create data-rich computational and parallel software components faster and more efficiently. Focusing on F# 3.0 and Microsoft Visual Studio 2012, you’ll learn how to exploit F# features to solve both computationally-complex problems as well as everyday programming tasks"

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