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  • Class as first-class object

    - by mrpyo
    Could a class be a first-class object? If yes, how would the implementation look? I mean, how could syntax for dynamically creating new classes look like? EDIT: I mean what example syntax could look like (I'm sorry, English is not my native language), but still I believe this question makes sense - how you give this functionality while keeping language consistent. For example how you create reference for new type. Do you make reference first-class object too and then use something like this: Reference<newType> r = new Reference<newType>(); r.set(value); Well this could get messy so you may just force user to use Object type references for dynamically created classes, but then you loose type-checking. I think creating concise syntax for this is interesting problem which solving could lead to better language design, maybe language which is metalanguage for itself (I wonder if this is possible).

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  • Tomboy won't start

    - by torbengb
    I've just discovered Tomboy and like it. I added it to the startup applications, and on next boot Tomboy won't start. It then also won't start when I select it manually from the menu. I unchecked its entry in the startup applications and rebooted, but it still won't start. I uninstalled it and installed it again in order to perhaps fix some broken file or setting, but it didn't help. I saw this question and added the Applet. But the applet says "Tomboy Notes" has quit unexpectedly and a reload doesn't work; the message appears again. How can I determine (and fix!) what's wrong?

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  • Time tracking and payment registration architecture

    - by egis
    ?itle might be a little bit incorrect. :) Anyway, I'm building a software where employees input time they worked per day (work hours) and employer "pays" for this time. "Payment" is done outside this system, so employer just "confirms" (checkbox or something like this) which work hours are paid. So the question is - what is the best way (both UI and data storage wise) to implement this? At the moment I have this idea: Employee selects week and manually (with some Javascript helpers, like "fill the same time for all days") inputs work hours in every day of the week. Employer confirms payment the same way employee inputs data (selects week, confirms each day). Data is saved in DB as unix timestamp (one day per table row). Problem is 14 inputs (7 days * ("hours from" + "hours to" input), yet this approach seems kinda easy to implement. Maybe I'm overlooking something and this can be done differently and better? Maybe someone has any example of already working software?

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  • Got an idea for an application, but part of it is patented, any suggestions?

    - by tekiegreg
    so I've been working on developing an idea for an application that I think has the potential to be successful, however after some initial research I've discovered that at least part of my ideas are covered by a patent out there, the patent in particular is held by a really large company (I don't want to give away specifics for fear I'd draw their attention for sure). I'm debating a few options: 1) Develop patents around my ideas that don't conflict and maybe approach the company in question for a license exchange 2) Just approach them for a license outright 3) Just develop around it anyways and hope for the best :-p What have other people done in these situations? Are companies generally willing to grant patent licenses? Are they willing to grant them at reasonable prices? Thoughts?

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  • App Development books for intermediate level

    - by 0cool
    This question seems to be asked previously on this site but the audience targeted are different. I am an Engineering student who knows Python, C and familiar with Java(learning now; good at fundamentals) & HTML. Now, I want to develop facebook & Android apps. I went through their respective documentations but couldn't really understand and thought to search for beginner books but they have been written from too basic. (There is an beginner's android book for from APress for people who have no idea of programming). My problem is, I am unable to find the right book to learn. Either they are for beginners or for experts... For guys like me, can anyone point out a good book?

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  • Why must I restart for HDMI audio?

    - by David Shochat
    I have a System76 Lemur Ultra laptop, which has an HDMI port. When I plug in the HDMI cable, it is recognized immediately for video, but not for audio, i.e., it does not show up in the Output tab of the Sound Settings dialog. However, if I do a full restart with the cable plugged in, then it does show up and can be selected. I've also discovered that manually killing and restarting pulseaudio with the HDMI plugged in will force it to be recognized as an available audio output. So my question is, what is broken here? I've thought about writing a bug in launchpad, but I don't know which component is malfunctioning. Is it the kernel? ALSA? Pulse Audio? Something else? By the way, the same bug seems to exist in reverse, namely if I disconnect the HDMI, it is still listed in the Output tab until I again restart the OS. This is 12.04 LTS.

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  • Are there non-programming related activities akin to solving programming problems ?

    - by julien
    I'm talking about particular activities, for which you can draw parallels with the specific kind of reasonning needed when solving programming problems. Counter examples are activities that would help in almost any situation, like : take a shower or any other, somewhat passive activities, which are only helpful in triggering this sort of asynchronous problem solving our brain does exercise, because you brain simply works better when you're fit EDIT : It seems this question was quite misunderstood. I wasn't asking about what you can do when stuck on a problem but rather, what kind of activities you have in you spare time that you think help you, more or less directly, solving programing problems.

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  • Getting isometric grid coordinates from standard X,Y coordinates

    - by RoryHarvey
    I'm currently trying to add sprites to an isometric Tiled TMX map using Objects in cocos2d. The problem is the X and Y metadata from TMX object are in standard 2d format (pixels x, pixels y), instead of isometric grid X and Y format. Usually you would just divide them by the tile size, but isometric needs some sort of transform. For example on a 64x32 isometric tilemap of size 40 tiles by 40 tiles an object at (20,21)'s coordinates come out as (640,584) So the question really is what formula gets (20,21) from (640,584)?

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  • Having MSc or Experience worth in industrial environments?

    - by Abimaran
    I'm a fresh graduate in Electronic & Telecommunication field, and in our University, we can have major and minor fields in the relevant subjects. So, I majored in telecommunication and minored in Software Engineering. As I learned programing long before, Now I'm passionate in SE and programming. And, I want drive into the SE field. And, It came to know that, in industries, most of them expecting the candidates to have the experience, or having a MSc in the related field. [I'm referring my surrounding environment, not all the industries]. My Question, How do they consider those MSc and experience guys in the industries? Thanks!

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  • In dual boot PC, the boot/GRUB menu suddenly disappeared (Ubuntu option is not appearing anymore)

    - by iammilind
    I have been using Ubuntu 13.04 as my primary OS for quite sometime on Sony VAIO laptop with other OS being windows 8 (never use it). Till today, everything was fine. In the evening I had shut down my PC and closed the lid; Typically I do this when the shutting down screen is still on. But probably this time it was fatal. When I again restarted my PC, now no menu is appearing for selecting OS and it directly goes for Windows 8. My question is similar to this thread, but I don't have Ubuntu CD as I had installed using pen drive sometime back. Is there any (genuine or workaround) easier way to get back the GRUB menu back in the place? Note that keyboard shortcuts in Sony VAIO is different, here I have an "Assist" menu as well to get those internal options.

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  • How do games make money? What models do they use?

    - by cable729
    I'm trying to research the ways in which games make money. I want to know more about the models they use (free/premium, trial/subscription, free-to-play with micro-transactions, etc.). In addition, I want information on which models work for which games, what models are best for which age groups, etc. I've tried my best to find information, and Google hasn't turned anything up at all. I think I'll stop by my University's library and see if there's anything there. This may seem like a broad question, but I'm looking for links and titles of books, not typed-out answers.

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  • Adding included columns to indexes using SMO

    - by Greg Low
    A question came up on the SQL Down Under mailing list today about how to add an included column to an index using SMO. A quick search of the documentatio didn't seem to reveal any clues but a little investigation turned up what's needed: the IndexedColumn class has an IsIncluded property. Index i = new Index (); IndexedColumn ic = new IndexedColumn (i, "somecolumn" ); ic.IsIncluded = true ; Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!...(read more)

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  • Independent projects as a student to show off abilities

    - by tufcat
    I'm an inexperienced student (having learned up to data structures and algorithms through various online resources) of computer science, and I'm hoping to get a job as a developer some time after I've gotten a few independent projects done. My question is, how should I choose which projects to work on? I've been looking around stackoverflow-- people usually say to pick whatever you're interested in, but I don't have enough experience to even know what specifically I'm interested in, and possibly more importantly, I don't know what some common beginner project types are. Essentially, I'm at the gap between course work (and the projects entailed in those classes) and real programming, and I don't quite know how to start. If any of you have any ideas, I'd really appreciate it.

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  • Windows Error After Wubi Install

    - by user106563
    The initial install on my laptop was Windows 7. I installed Wubi on Sunday - the install seemed fine. I was able to log in and use both Ubuntu and Windows. On Monday I started receiving the following error in Windows: windows cannot access the specified device path or file This occurs on every link I click on - essentially rendering Windows unusable. I do not experience the same problem when Windows is started up in safe mode. I have tried numerous virus scans (Malware bytes, Avg, AdAware) and have removed various trojans etc. Windows is still unusable. Ubuntu seems fine so far. My question is, can this error be attributed to the Wubi install?

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  • Google's process for publishing/modifying pages [closed]

    - by Glenn Dayton
    I'm assuming that a group of people at Google have control of certain sections of google.com, but how does Google make sure that employees don't accidentally or intentionally sabotage the website? Does Google use Adobe Contribute or some similar product for sharing/publishing the website. Do employees use WebDAV, FTP, SFTP, or SSH to publish the site. Since Google has hundreds of thousands of servers it probably takes some time for its servers to update. Do they transmit the new copy of the website to all servers before publishing at once? This question does not apply to Google editing a database and having a page reflect the database's changes. It applies to employees editing the source code and/ or back end of the site.

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  • What is this chargeback scam from eBooks bought on my website?

    - by Dan Friedman
    We have a scammer that is buying our e-Books and then performing chargebacks. Our e-Books don't have DRM, so if they wanted to resell them, they would only need to buy each book once. But instead, they keep buying the same books over and over again and then performing hundreds of chargebacks. We have created some additional rules in our fraud protection tools to block certain aspects, even though all the info looks legit, and are hopeful this will slow them down. But my question is: What is the scam? If they aren't getting any product and they only get chargebacks for something they already purchased, then they can't get additional money from the credit card company, so then what's their motivation?

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  • Creating a bootable USB recovery drive to be used by someone who isn't computer savvy

    - by David
    I am looking for a way to prepare an image of an Ubuntu machine which would be bootable and installable in the easiest way possible. I'm actually preparing an Ubuntu machine for someone living far, and not computer savvy. If he ever has troubles with his installation, he could just put a USB drive in, boot the machine and everything would be resetted for him. I know there are many methods of creating/loading an image of a drive, but the ones I've found so far have complicated menus with several options to choose from, etc. Ideally, perhaps only asking a Yes/No question such as "Would you like to reinstall?" would be great. Does such a tool exist? Thank you in advance!

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  • Do delegates defy OOP

    - by Dave Rook
    I'm trying to understand OOP so I can write better OOP code and one thing which keeps coming up is this concept of a delegate (using .NET). I could have an object, which is totally self contained (encapsulated); it knows nothing of the outside world... but then I attach a delegate to it. In my head, this is still quite well separated as the delegate only knows what to reference, but this by itself means it has to know about something else outside it's world! That a method exists within another class! Have I got myself it total muddle here, or is this a grey area, or is this actually down to interpretation (and if so, sorry as that will be off topic I'm sure). My question is, do delegates defy/muddy the OOP pattern?

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  • Why are KDE components being installed/updated on 12.04 with GNOME?

    - by Dune
    I am not yet fully versed with the components installed by default on my machine, so I will apologize in advance if my question is silly. shows that a lot many of (what I assume are) KDE components (libk*, kde*, etc.) are being installed/updated on my machine. That is just the output from sudo apt-fast update && sudo apt-fast dist-upgrade -y from a few minutes ago. Can anyone tell me why? Can I safely remove them? If yes, how? Thanks in advance for any replies. System specs: Fully updated Ubuntu 12.04 x86_64 w/kernel3.4, Gnome, Unity, Core2Duo, 4GB

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  • When does a game idea cross the line between homage/parody to ripoff?

    - by Daniel T.
    I'm not sure where this question belongs, but as it pertains to the development of a game idea, I figured I'd try to post it here. Recently I've been inspired to create a game based on another game I've played. However, the idea that I have is very similar to the original game. I was wondering, when does a game idea cross from being a homage or parody into the realm of being a ripoff? Are there any hard or fast rules or does this cross into a gray area?

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  • Community to discuss project ideas

    - by Auxiliary
    Although I already predict the down votes but the question has stuck in my throat for a while now. I think this has happened to many of us. Sometimes we find a great idea for a project and obviously think this is THE GREATEST idea ever but then one of the following things will happen: The project is a small one, so you might actually give it a try and see how it goes. The project is a big one, even a risk, and you just need a good programmer's community that you could just discuss your idea with them and see what they say and even get some help to make it happen. And there's always the possibility of others stealing your idea which is really bad. So could anyone suggest an online community or place or even method of talking about ideas and the ways of developing them? and do you think it's a good thing to tell others about your idea?

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  • which kernels can I safely purge?

    - by ecoologic
    I use the main answer of this question quite often to clear some space, but now I'm in extreme need and I'd like to better understand which kernels are safe to purge, my list is the following 10:50:58-673 - ~> dpkg -l | grep -Eo "^.i +linux-(image|headers)[^ ]+" | cut -c 5- | grep --color -E "$|"`uname -r` linux-headers-2.6.38-15 linux-headers-2.6.38-15-generic linux-headers-2.6.38-15-generic-pae linux-headers-2.6.38-16 linux-headers-2.6.38-16-generic linux-headers-2.6.38-16-generic-pae # current one linux-headers-generic linux-headers-generic-pae linux-headers-server linux-image-2.6.38-15-generic-pae linux-image-2.6.38-16-generic-pae linux-image-generic-pae linux-image-server Is it enough to keep linux-headers-2.6.38-15 linux-headers-2.6.38-15-generic linux-headers-2.6.38-15-generic-pae linux-headers-2.6.38-16 linux-headers-2.6.38-16-generic linux-headers-2.6.38-16-generic-pae # current one Or would this be enough linux-headers-2.6.38-15-generic-pae linux-headers-2.6.38-16-generic-pae # current one Or which other would be the shortest (keeping the previous one too)? And why?

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  • Why does Ubuntu delay a lot on booting?

    - by UbuntuUser2013
    I have a problem. My Ubuntu delays a lot to boot, my computer is 4GB RAM, Core2Duo 3.2Ghz This is my bootchart: http://img841.imageshack.us/img841/138/desktopmvx.png I can't understand what is the problem. Thank you. Original question in spanish: Por que tarda tanto el arranque de ubuntu? Hola les comento que tengo un problema mi ubuntu tarda demasiado arrancando, mi computadora es 4GB Ram, core2duo 3.2ghz Este es mi bootchart http://img841.imageshack.us/img841/138/desktopmvx.png No entiendo cual es el problema. Gracias!

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  • Use PathModifier of MoveModifier for Tower of Defense Game

    - by Siddharth
    In my game I want to move enemy on the fixed path so that I have establish manual grid structure for that purpose not used tile map. Game contain multiple level and the path will be different for each level and also multiple fixed path exist for each level. So my question is, What I have to use MoveModifier or PathModifier for my game ? Also mention I have to use WayPoint or not. Further detail you all are free to ask. Please help me to decide what to do.

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  • Is it legal to develop a game using D&D rules?

    - by Max
    For a while now I've been thinking about trying my hand at creating a game similar in spirit and execution to Baldur's Gate, Icewind Dale and offshoots. I'd rather not face the full bulk of work in implementing my own RPG system - I'd like to use D&D rules. Now, reading about the subject it seems there is something called "The License" which allows a company to brand a game as D&D. This license seems to be exclusive, and let's just say I don't have the money to buy it :p. Is it still legal for me to implement and release such a game? Commercially or open-source? I'm not sure exactly which edition would fit the best, but since Baldur's Gate is based of 2nd edition, could I go ahead an implement that? in short: what are the issues concerning licensing and publishing when it comes to D&D? Also: Didn't see any similar question...

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