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  • how to use sort function the same way as max or min in mathematica

    - by Qiang Li
    Please take a look at the following code: Sort[{1, y, x}, Greater] Max[{1, x, y}] x = 1 y = 2 Sort[{1, y, x}, Greater] Max[{1, x, y}] It is interesting to note that the first Sort always produce a definite result while the first Max does not, even when Greater is specified. Note I have not given any numerical values for x and y. Why is this and how can I have a Sort function behave the same way as the Max (or Min) function? Thanks!

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  • Any good C interpreters?

    - by NoMoreZealots
    I was looking at Ch from SofIntegration and it looks pretty interesting as a possible teaching tool. It would allow the you to let someone learning to program "play" while preparing them to write full fledged C programs. I was wondering if anybody had "good" experiences using a C interpreter or weather it would be a better to go with a language that is typically interpreter to start with?

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  • question about function derivatives

    - by davit-datuashvili
    hi i have question for example i have some function int sumefunction(//parameters here let say int x){ return something let say x*x+2*x+3 or does not matter } i am interesting how find derivative of this function ?if i have int f(int x){ return sin(x); } after derivative it must return cos(x) thanks

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  • Money vs. Decimal vs. Float Performance issues (SQL data types for Currency value)?

    - by urz shah
    What data type should be selected in case of Currency value column in SQL server. I have read some where on web Working on customer implementations, we found some interesting performance numbers concerning the money data type. For example, when Analysis Services was set to the currency data type (from double) to match the SQL Server money data type, there was a 13% improvement in processing speed (rows/sec). Is it true??

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  • How to get input from web?

    - by Dunix
    Hi, i am trying to find out, how to get input from html inputs using c++. In windows you can send WM_GETTEXT to the window and it returns text, that you wanted. But is there any way to do the same thing in web interface?. I am not interesting in sniffing packets now.

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  • What's the best way to generate an API reference document using a Rails routes.rb file?

    - by RNHurt
    I am trying to document the API for my Rails application and I can't help but wonder if there is a better way to generate an XML file based on my routes.rb file. I'm envisioning something similar to the output of rake routes but in a more friendly, XML type format. Corey has some interesting ideas about using reflection/introspection on the routes file here but it's not quite what I need. Please tell me this is a solved problem and I'm not the first one to think of this. :)

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  • Are there any lightweight analogues to CORBA/RPC for embedded programs?

    - by Mtr
    I am writing embedded applications for different hardware (avr, arm7, tms55xx…) and different rtoses (freeRTOS, rtx, dsp/bios). And every second of them needs to communicate with PC or another digital device. Sometimes interactions logic is very advanced. So I'm interesting in common methodology (like state-machine programming style), protocol specification or library, that could simplify developing such things.

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  • What work has been done on cross-platform mobile development?

    - by Nicholas
    Have any well-documented or open source projects targeted iPhone, Blackberry, and Android? Are there other platforms which are better-suited to such an endeavor? Note that I am particularly asking about client-side software, not web apps, though any information about the difficulties of using web apps across multiple mobile platforms is also interesting.

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  • JQTouch Pressure Sensitivity

    - by rson
    I noticed an interesting bug with the JQTouch platform and wanted to know if anyone else has run into it our has a workaround for it. If I have a link with an onclick event and lightly tap the link on the iPhone, the link works, but the click event is not fired. If I tap the same link harder, the event fires. Any thoughts on this?

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  • please suggest good variable names that represent theirself ( php)

    - by I Like PHP
    Hi all, it may be wrong place to ask this question, but i hope u all programmer must have the interesting naming convention of variables. i have seen many places that some variable names are very good n effective like common variable names $link $db $connect $query $stmt $sql $qry $output $result $list so please suggest me some good names for variable , bcoz all time i have to write $x, $y etc.. if i want to save something instantly on page...that are even not relevant, so please suggest me good variable names

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  • Project to learn J2EE technologies.

    - by Chandra
    Attended a 2 week j2EE course and learnt the concepts. Want to try in a simple project and wanted ideas on what that could be? PetStore or Small Business App are so boring... Anything interesting that can be done to learn the breadth but at the same time it not being a full fledged project?

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  • Where is Prolog used for traffic control systems?

    - by Masi
    The user Laurent had an interesting reply to the question [Why hasn’t logic programming caught on?]: If you look at the influence logic-programming has had in the field of -- air traffic control -- I don't think it can be said logic-programming has not caught on. A question arises: Where is prolog used for traffic control systems on the roads? Why is it used instead of languages, such as C or Python, in such environments?

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  • Metaprogramming on web server

    - by bobobobo
    From time to time, I find myself writing server code that produces JavaScript code as the output result. I can point out why it is really bad: Inextricable tie between server code and client code. Can render client code un-reusable. But sometimes, it just seems to make sense. And isn't it kinda sorta interesting? I guess the question is, is writing server code that produces JavaScript code a really bad practice, or "does everyone do it"?

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  • Example of application to design with fingers (source code)

    - by STD
    Hi, i'm new user about this interesting forum! I want start develop application for android and before starting i want learn about some android feature... the first android feature is how to correlate finger motion in screen with java... Exist some source code that show how to realize application to draw with finger in android screen? can you suggest me where donwload it? thanks

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  • C++, class as parameter to a method, not template.

    - by ra170
    So, I came across an interesting method signature that I don't quite understand, it went along the lines of: void Initialize(std::vector< std::string > & param1, class SomeClassName * p); what I don't understand is the "class" keyword being used as the parameter, why is it there? Is it necessary to specify or it is purely superficial?

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  • UIView viewWithTag 0 problem

    - by leon
    Hi, On view in IB I have numerous items (including view itself). ONLY one item has tag 0, yet following line works for ANY UITextBox other then the one with tag 0. Note that only ONE UITextBox has tag 0, why: (UITextField *) [self.view viewWithTag:0]).text = @"foo"; Interesting that when triggered event received for the element with tag 0, I can get value of Tag 0 with no problem. Is there a limitation to look for tag 0 elements?

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  • Easy way to add custom prerequisite in clickonce publish (VS 2010)

    - by Maciej
    I would like to add Infragistics dlls as custom prerequisite when publishing my project. I've read about that: http://msdn.microsoft.com/en-us/library/aa730839%28VS.80%29.aspx But this seems to be a bit complicated... I wonder if exists a bit simple way to archive that (eg by passing URL to setup.exe or such) ? EDIT This Might be also interesting: http://www.codeproject.com/KB/aspnet/Add_Custom_Prerequisite.aspx?msg=2520811 will check and let you know...

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  • Where c++ really shines?

    - by pygabriel
    I know C and python, and I'm moving toward another language for learning purposes. My problem is that I like to learn things with something to do (for example contributing to some project or do something amazing, not boring plain algebra). I would like to hear suggestions about the fields in which C++ shines and where I can found interesting programming with C++. (for fields I mean networking/gui programming/algorithms/games ...)

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  • Fade portfolio image on hover to reveal a magnifying glass or plus sign etc?

    - by ade123
    Hi, I've seen an interesting image hover effect being used a lot lately and was wondering whether anyone has any tips or advice on how best to create this effect? What I'd like to create is a hover effect, so that when you hover over an image, the image fades and a magnifying glass or similar icon fades in. Highlighting the fact that if you click the image, it will enlarge etc. Here is a nice example of the effect: http://themes.mysitemyway.com/infocus/gallery/portfolio/ Any advice or pointers would be greatly appreciated.

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