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  • Why do we need a format for binary executable files

    - by user3671483
    When binary files (i.e. executables) are saved they usually have a format (e.g. ELF or .out) where we have a header containing pointers to where data or code is stored inside the file. But why don't we store the binary files directly in the form of sequence of machine instructions.Why do we need to store data separately from the code?Secondly when the assembler creates a binary file is the file is among the above formats?

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  • Swap Utilization: System Level Versus Individual Process

    - by Max
    On my top output, at header level, swap is showing 0k used. But on each individual process the SWAP is shown as a non-zero value (output column enabled with option p). What does this mean? Swap: 4870140k total, 0k used, 4870140k free, 571300k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ SWAP COMMAND 2448 max 20 0 323m 87m 27m S 0 4.4 1:23.31 236m chrome

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  • Unable to start backuppc

    - by iUngi
    I had a ext4 drive today I replaced with a RAID drive, I moved all the files from the old HDD. After that I tried to start the Backuppc but I'm getting the following error: Can't create a test hardlink between a file in /media/WESYS_RAID/backups/nbackuppc/pc and /media/WESYS_RAID/backups/nbackuppc/cpool. Either these are different file systems, or this file system doesn't support hardlinks, or these directories don't exist, or there is a permissions problem, or the file system is out of inodes or full. Use df, df -i, and ls -ld to check each of these possibilities. Quitting... The permission looks like this: drwxrwxrwx 2 backuppc backuppc 4096 2012-04-12 11:06 cpool -rwxrwxrwx 1 backuppc backuppc 14290 2012-04-10 16:00 dead.letter drwxrwxrwx 2 backuppc backuppc 4096 2012-04-12 10:56 log drwxrwxrwx 2 backuppc backuppc 4096 2012-04-12 11:08 pc drwxrwxrwx 2 backuppc backuppc 4096 2011-10-27 22:40 pool drwxrwxrwx 2 backuppc backuppc 4096 2011-10-27 22:40 trash I also tried to create hardlinks and it does work ln -i test.txt testlink The result of the df -i Filesystem Inodes IUsed IFree IUse% Mounted on /dev/sdc 122101760 1279684 120822076 2% /media/WESYS_RAID /dev/mapper/WeSyS_LVM 115687424 308565 115378859 1% /media/WESYS_LVM What am I doing wrong?

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  • Profiling and containing memory per system

    - by chadb
    I have been interesting in profiling and keeping a managed memory pool for each subsystem, so I could get statistic on how much memory was being used in something such as sounds or graphics. However, what is the best design for doing this? I was thinking of using multiple allocators and just using one per subsystem, however, that would result in global variables for my allocators (or so it would seem to me). Another approach I have seen/been suggested is to just overload new and pass in an allocator for a parameter. I had a similar question over on stackoverflow here with a bounty, however, it seems as if perhaps I was too vague or just there is not enough people with knowledge in the subject.

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  • How do I disable network connection at prelogin?

    - by ProGNOMmers
    --- This question is related to Ubuntu 12.10, since previous versions did not connect to network before login --- I had a bad boot today: the Ubuntu screen was blocked at startup time, after a green [OK] and a white blinking underscore. In recovery mode I figured out the problem: NetworkManager hung trying to connect to a wireless network that wasn't available anymore, and so I couldn't reach the prelogin level. Anyway: I really don't like that the pc connects to a network before the user logging in. How is it possible to disable it?

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  • pykaraoke on xp pro

    - by user170175
    i have dell laptops they all have xp-pro on them.what is happening is i have pykaraoke 7.1 on a disk and installed it on a couple of laptops and it works great.the other laptops say pykaraoke bad configeration,reinstall may fix this.i do that and i8t still doesnt work says the same thing.i even copyed the program from a working laptop and that didnt work.it doesnt make cence that it works on some but not the others.

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  • RoboForm Enterprise v7 Reviewed

    With an established pedigree in the consumer market, RoboForm is making the move to the enterprise with some good and bad results. eSecurityPlanet's thorough review says Siber Systems has delivered enough to warrant business consideration.

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  • RoboForm Enterprise v7 Reviewed

    With an established pedigree in the consumer market, RoboForm is making the move to the enterprise with some good and bad results. eSecurityPlanet's thorough review says Siber Systems has delivered enough to warrant business consideration.

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  • Windows 8 Initial User Experience

    - by Kevin Shyr
    Today is the second day I'm using a Windows 8 laptop.  Load up time is fast, and changing applications is very smooth.  However, I keep finding myself hitting the windows key (double-clicking a PDF file, and, what?  How do I get back?)Other than that, the experience has been fine.  So far this has not been any worse than other windows upgrade experience I had so far.  No bad news is good news here.

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  • Rules of Holes #4 -Do You Have the BIG Picture?

    - by ArnieRowland
    Some folks decry the concept of being in a 'Hole'. For them, there is no such thing as 'Technical Debt', no such thing as maintaining weak and wobbly legacy code, no such thing as bad designs, no such thing as under-skilled or poorly performing co-workers, no such thing as 'fighting fires', or no such thing as management that doesn't share the corporate vision. They just go to work and do their job, keep their head down, and do whatever is required. Mostly. Until the day they are swallowed by the...(read more)

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  • What will be correct answer to "why is NoSQL faster than SQL" on interview?

    - by Cynede
    It's just nonsense for me personally. I can't see any performance boost by using NoSQL instead of SQL. Maybe SQL over NoSQL, yes but not in that way. I think that if I answer "I have no idea" or something like that it will be bad answer because this doesn't really look like a fake-question, it's a serious question on interview but how should be looking correct answer on this question? Or am I missing something about NoSQL?

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  • Got Questions? Ask the Experts at MIX10

    On Monday the 15th from 5pm 6:30pm at MIX10 there will be a Ask the Experts event where an incredible pool of knowledgeable experts on topics including Silverlight, WCF RIA Services, and Blend will be available to answer your questions. You can also win some great prizes including a Zune HD! Ill be there along with Adam Kinney, Brad Abrams, Joe Stegman, and many others. More details are below, but please stop by and see us! Ask the Experts returns to MIX on Monday, March 15. 5:00 6:30pm; Monday,...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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  • (Where) Can I learn creating art for my 2D games?

    - by Poorly paid coder
    I'm currently bad at drawing. If I want to create something looking acceptable, it usually takes me hours and hours to fiddle around just to get the basic looks right. I think that I'm not completely skill-less, I just lack simple drawing techniques.. Am I a hopeless case? Where is a good place to start out in drawing for 2D games? I'd like to be able to create acceptably good backgrounds, terrains / tilemaps, characters and weapons

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  • What parameters to use to compare GUI frameworks / toolkits?

    - by gooli
    I'm doing some research on the best GUI toolkit to use for future products at the company. We're talking about a fairly large organizations with quite a bit of code and a complete rewrite project in planning. Don't ask. Anyway, I'm trying to create a list relevant parameters to judge the toolkits. What would you use to drive the comparison? Here's what I've got so far: Maturity Ease of development Ease of prototyping Ease of maintenance Size of hiring pool Available knowledge at the company Training costs Community size Community level of expertise (how hard to find good answers to complex problems) Amount of expert-level books available Ability to interface to other technologies Deployment considerations Visual aesthetics Ability to access OS resources Multiple monitor support (something that might come in handy in our particular application)

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  • Temporary Object Caching Explained

    - by Paul White
    SQL Server 2005 onward caches temporary tables and table variables referenced in stored procedures for reuse, reducing contention on tempdb allocation structures and catalogue tables.  A number of things can prevent this caching (none of which are allowed when working with table variables): Named constraints (bad idea anyway, since concurrent executions can cause a name collision) DDL after creation (though what is considered DDL is interesting) Creation using dynamic SQL Table created in a...(read more)

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  • Friday Fun: Museum of Thieves

    - by Asian Angel
    In this week’s game you are lured to the mysterious Museum of Dunt where adventure and an evil force awaits. Can you find the differences in the museum’s strange, shifting rooms as you work your way through it or will the restless evil that dwells within escape? Make Your Own Windows 8 Start Button with Zero Memory Usage Reader Request: How To Repair Blurry Photos HTG Explains: What Can You Find in an Email Header?

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  • Does it make the game more fun when the user is forced to progress thru the levels sequentially rather than letting them pick and play?

    - by BeachRunnerJoe
    Hello. For the first time in my game, I'm stuck with a real design dilemma. I guess that's a good thing ;) I'm building a word puzzle game that has five levels, each with 30 puzzles. Currently, the user has to solve one puzzle at a time before moving to the next. However, I'm finding the user occasionally gets stuck on a puzzle, at which point they can no longer play until they solve it. This is obviously bad because many people will just quit playing the game and delete the app since they get frustrated and can't play any other puzzles until the current puzzle is solved. The only elegant solution I can find to helping the player get unstuck is changing the design of the game to allow the users to pick any puzzle to play at any time. This way, if they get stuck, they can come back to it later and at least they have other puzzles to play in the meantime. It's my opinion, however, that this new flow design doesn't make the game as fun as the original flow design where the player has to complete a puzzle before moving to the next. To me, it's like anything else, when you only have one of something, it's more enjoyable, but when you have 30 of something, it's far less enjoyable. In fact, when I present the user with 30 puzzles to choose from that they need to solve before unlocking the next level, it almost seems as tho I'm making them feel like it's work they have to do. I even had a tester voluntarily tell me that being forced to complete a puzzle before moving to the next is more motivating. My questions are... Do you agree/disagree? Do you have any suggestions for how I can help the player get unstuck? Thanks so much in advance for your thoughts! EDIT: I should mention that I've already considered a few other solutions to helping the user get unstuck, but none of them seem like good ideas. They are... Add more hints: Currently, the user gets two hints per puzzle. If I increase the hint count, it only makes the game more easy and still leaves the possibility of the user getting stuck. Add a "Show Solution" button: This seems like a bad idea because it's my opinion this takes the fun out of the game for many people who would probably otherwise solve the puzzle if they didn't have the quick option to see the solution.

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  • Look-up Tables in SQL

    Lookup tables can be a force for good in a relational database. Whereas the 'One True Lookup Table' remains a classic of bad database design, an auxiliary table that holds static data, and is used to lookup values, still has powerful magic. Joe Celko explains.... NEW! SQL Monitor 2.0Monitor SQL Server Central's servers withRed Gate's new SQL Monitor.No installation required. Find out more.

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  • Incorrect monitor colours

    - by PedroGabriel
    I'm using Ubuntu 11.10 and my monitor had a problem where Green is the bright colour, there's no way to change it in the monitor settings, so when I was using WinXP (I'm new in here) I changed the green to lower using Video Driver settings, in here (ubuntu) I don't know exactly how I would change the green colour to low, so my "black" would be seem has a real black, no green. Thanks for reading. Sorry for bad English.

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  • {12.04} cannot open software center or use apt-get install

    - by d6braun
    i have been trying to get it working for over an hour and a half now, the code below is what i keep getting. the example is from me trying to install synaptic, but i get the errors on most apt-get commands and update manager. sudo apt-get install synaptic Reading package lists... Error! E: Encountered a section with no Package: header E: Problem with MergeList /var/lib/apt/lists/wine.budgetdedicated.com_apt_dists_edgy_main_binary-i386_Packages E: The package lists or status file could not be parsed or opened.

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  • In C++, is it a reflection of poor software design if objects are deleted manually?

    - by grokus
    With the advent of smart pointers, is it a sign of poor design if I see objects are deleted? I'm seeing some software components in our product that people are still doing this. This practice strikes me as un-idiomatic, but I need to be sure this is the industry consensus. I'm not starting a crusade but it'd be nice to be prepared theory wise. Edit: legit uses of delete, Klaim mentioned the object pool use case. I agree. Bad examples of using delete, I am seeing many new's in constructor or start() and corresponding delete's in the destructor or stop(), why not use scoped_ptr? It makes the code cleaner.

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  • Refactor: Sequential Coupling => Template Method

    Another colleague brought me present today - the blog post. Thank you. You were right!We will do some refactoring which will lead us from Anti-Pattern to Pattern. From Sequential Coupling to Template Method. And as I see it could be very common way to refactor bad code that represents mentioned anti

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  • Where can I safetly search domain whois without worrying about the search engine parking on the domain immediately after the search?

    - by Evan Plaice
    There are a lot of companies that provide domain whois but I've heard of a lot of people who had bad experiences where the domain was bought soon after the whois search and the price was increased dramatically. Where can I gain access to a domain whois where I don't have to worry about that happening? Update: Apparently, the official name for this practice is called Domain Front Running and some sites go as far as to create explicit policies stating that they don't do it. This is where a domain registrar or an intermediary (like a domain lookup site) mines the searches for possibly attractive domains and then either sells the data to a third-party, or goes ahead and registers the name themselves ahead of you. In one case a registrar took advantage of what's known as the "grace period" and registered every single domain users looked up through them and held on to them for 5 days before releasing them back into the pool at no cost to themselves. Source: domainwarning.com And apparently, after ICANN was notified of the practice, they wrote it off as a coincidence of random 'domain tasting'. Source: See for yourself

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