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  • NoSQL vs. MySQL when scalability is irrelevant

    - by Bryan Ward
    Recently I have read a lot about different NoSQL databases and how they are being effectively deployed by some major websites out there. I'm starting a project in which I think the schema-free nature of a database such as MongoDB would be tremendously useful. Everything I have read though seems to indicate that the main advantage of a NoSQL database is scalability. Is choosing a NoSQL database for the schema-free design just as legitimate a design decision as that of scalability?

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  • Is it possible to generate a .h macros file from bjam?

    - by Gnurou
    I need to dynamically generate some macros into a .h configuration file that C programs can include in order to check which options are enabled, in a fashion similar to what is possible with CMake's CONFIGURE_FILE macro. But after looking in the doc and the web, I could not find something useful. Is it possible to generate such a file from bjam and have the dependencies handled correctly? If so, how would you do it?

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  • Are there any GOOD Chef, Chef-Server and Chef-Client tutorials out there?

    - by btelles
    Hi there, Chef from Opscode seems to be really useful for configuring servers and such, but trying to follow their documentation is a little difficult. Some terms are defined after they are used, and definitions sometimes reference new terms that you haven't yet encountered. Anyone know of any GOOD tutorials/walk-throughs for getting a good understanding of Chef, Chef-Server and Chef-Client? I remember seeing one video presentation online, but it barely scratched the surface.

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  • Some clarification on rvalue references

    - by Dennis Zickefoose
    First: where are std::move and std::forward defined? I know what they do, but I can't find proof that any standard header is required to include them. In gcc44 sometimes std::move is available, and sometimes its not, so a definitive include directive would be useful. When implementing move semantics, the source is presumably left in an undefined state. Should this state necessarily be a valid state for the object? Obviously, you need to be able to call the object's destructor, and be able to assign to it by whatever means the class exposes. But should other operations be valid? I suppose what I'm asking is, if your class guarantees certain invariants, should you strive to enforce those invariants when the user has said they don't care about them anymore? Next: when you don't care about move semantics, are there any limitations that would cause a non-const reference to be preferred over an rvalue reference when dealing with function parameters? void function(T&); over void function(T&&); From a caller's perspective, being able to pass functions temporary values is occasionally useful, so it seems as though one should grant that option whenever it is feasible to do so. And rvalue references are themselves lvalues, so you can't inadvertently call a move-constructor instead of a copy-constructor, or something like that. I don't see a downside, but I'm sure there is one. Which brings me to my final question. You still can not bind temporaries to non-const references. But you can bind them to non-const rvalue references. And you can then pass along that reference as a non-const reference in another function. void function1(int& r) { r++; } void function2(int&& r) { function1(r); } int main() { function1(5); //bad function2(5); //good } Besides the fact that it doesn't do anything, is there anything wrong with that code? My gut says of course not, since changing rvalue references is kind of the whole point to their existence. And if the passed value is legitimately const, the compiler will catch it and yell at you. But by all appearances, this is a runaround of a mechanism that was presumably put in place for a reason, so I'd just like confirmation that I'm not doing anything foolish.

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  • Cocoa Touch best practice for capturing/logging/diagnosing crashes

    - by Dylan
    As I get closer to releasing my first public iPhone app I'm concerned about catching crashes in the field. I'm curious to hear how others have gone about this. I'm not sure what's possible outside of the debugger. Is all lost with an EXC_BAD_ACCESS or can I still catch it and get something useful into a log? Is the program main() the spot to put a @try/@catch?

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  • Making the sound for a Flash game.

    - by Artemix
    Hu guys, I'm developing a Flash game, and I'm interested in knowing what would be the process of making sound. I want to make my own sounds, if possible, and not to download some premade standard (and possibly lawsuitable if they are not "totally free") sounds from the web. So.. I've read that a synthesizer could be useful.. but, I really dont know. Thx!

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  • How does Lucene work

    - by Midhat
    I am trying to find out how lucene search works so fast. Cant find any useful docs on the web. If you have anything (short of lucene source code) to read, let me know. A text search query using mysql5 text search with index takes about 18 minutes in my case. A lucene search for the same query takes less than a second

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  • Validating key/certificate pairs with M2Crypto when a certificate chain is needed

    - by Charles Duffy
    M2Crypto.X509.X509 objects have a verify(pkey) method, which provide a means of testing that a given certificate does in fact sign a specified key. This is a good and useful thing -- except that sometimes the certificate I want to verify in this way is invalid without the use of an intermediate certificate, which this API does not appear to allow a way to specify. Is there an alternate means of validating a certificate / private key pair which will work even when the certificate is unable to stand alone?

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  • Create Directory for records in MS Access 2007

    - by glinch
    Hi there, Is it possible to create a directory folder for individual records in Access 2007. For example tblUser ID firstName surName When adding a record, would create a folder C:\userdatabase\Surname,firstName,ID Could see this being useful in situations for example where a large amount of images/files would need to be associated with a record. Access would create and link to a directory for each record. Thanks in advance for any advice Noel

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  • uses for dynamic scope?

    - by Stephen
    Hi, I've been getting my hands wet with emacs lisp, and one thing that trips me up sometimes is the dynamic scope. Is there much of a future for it? Most languages I know use static scoping (or have moved to static scoping, like Python), and probably because I know it better I tend to prefer it. Are there specific applications/instances or examples where dynamic scope is more useful?

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  • What features would you like to see added to your favorite programming language?

    - by George Edison
    Are there any features you would like to see added to a programming language? Maybe... A programming construct An extra operator A built-in function you think would be useful I realize questions like this are frowned upon, but I think this one is a genuine programming question that can be answered and the answers will spawn valuable discussion. (And it's community wiki.) Here is one of mine: How come C++ has no exponent operator, like Python's **?

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  • Hidden features of PL/SQL

    - by Adam Paynter
    In light of the "Hidden features of..." series of questions, what little-known features of PL/SQL have become useful to you? Edit: Features specific to PL/SQL are preferred over features of Oracle's SQL syntax. However, because PL/SQL can use most of Oracle's SQL constructs, they may be included if they make programming in PL/SQL easier.

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  • Why are Vi and Emacs popular ?

    - by Teifion
    I've never learned to use Vi or Emacs yet people do use them still, despite there being other editors out there that are free and useful. What is it about these two and any others like them that means they hold appeal in the face of the newer editors?

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  • Feature Driven Development Model (SDLC)

    - by j-t-s
    Hi All I've been searching all over the internet for days. Does anybody have, or know of, and can share sample Feature Driven Development documents? I keep coming across gazillions of "samples" with absolutely no useful information whatsoever. Thank you jt

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