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  • Benchmarking Java programs

    - by stefan-ock
    For university, I perform bytecode modifications and analyze their influence on performance of Java programs. Therefore, I need Java programs---in best case used in production---and appropriate benchmarks. For instance, I already got HyperSQL and measure its performance by the benchmark program PolePosition. The Java programs running on a JVM without JIT compiler. Thanks for your help! P.S.: I cannot use programs to benchmark the performance of the JVM or of the Java language itself (such as Wide Finder).

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  • Why are virtual methods considered early bound?

    - by AspOnMyNet
    One definition of binding is that it is the act of replacing function names with memory addresses. a) Thus I assume early binding means function calls are replaced with memory addresses during compilation process, while with late binding this replacement happens during runtime? b) Why are virtual methods also considered early bound (thus the target method is found at compile time, and code is created that will call this method)? As far as I know, with virtual methods the call to actual method is resolved only during runtime and not compile time?! thanx EDIT: 1) A a=new A(); a.M(); As far as I know, it is not known at compile time where on the heap (thus at which memory address ) will instance a be created during runtime. Now, with early binding the function calls are replaced with memory addresses during compilation process. But how can compiler replace function call with memory address, if it doesn’t know where on the heap will object a be created during runtime ( here I’m assuming the address of method a.M will also be at same memory location as a )? 2) v-table calls are neither early nor late bound. Instead there's an offset into a table of function pointers. The offset is fixed at compile time, but which table the function pointer is chosen from depends on the runtime type of the object (the object contains a hidden pointer to its v-table), so the final function address is found at runtime. But assuming the object of type T is created via reflection ( thus app doesn’t even know of existence of type T ), then how can at compile time exist an entry point for that type of object?

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  • parallel java libraries

    - by jetru
    I'm looking for Java libraries/applications which are parallel and feature objects that can be queried in parallel. That is, there is/are objects in which multiple types of operations can be made from different threads and these will be synchronized. It would be helpful if someone could ideas of where I could find such applications as well. EDIT: Actually, language doesn't matter so much, so C++, Python, anything is welcome

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  • practicing c programming

    - by hopefulLLl
    greetins everyone!! i'm a student learning c language and i need to test my c skills.. so can anyone suggest me any way that where can i find questions related to c programmes..i.e. writing c programmes!! from simple to complex(topic wise)..with solutions! thanx

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  • Visual Studio macro to navigate to T4MVC link

    - by shannon
    I use T4MVC and I'm happy with it and want to keep it - it keeps down run time defects. Unfortunately, it makes it harder to navigate to views and content (a.k.a. Views and Links in T4MVC) though. Even using Resharper, I can't navigate to the referenced item: T4MVC and Resharper Navigation Can I get a hand building a macro to do this? Never having built a VS IDE macro before, I don't have a grasp on how to get at some things, like the internal results of the "Go To Definition" process, if that's even possible. If you aren't familiar with T4MVC, here's generally what the macro might do to help: Given the token: Links.Content.Scripts.jQuery_js in the file MyView.cshtml, '(F12) Go To Definition'. This behaves properly. Having arrived at the the related assignment: public readonly string jQuery_js = "~/Content/Scripts/jQuery.js"; in a file generated by T4MVC (which is very nice, thank you David, but we really don't ever need to see), capture the string assigned and close the file. Navigate in Solution Explorer to the PhysicalPath represented by the captured string. This process would also work for views/layouts/master-pages/partials, etc. If you provide a macro or link to a macro to do this, or have another solution, wonderful. Otherwise, hints on how to do step 3 simply in a VS macro would be especially appreciated and receive upvote from me. I'd post the macro back here as an answer when done. Thanks!

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  • What grammar based parser-generator tools exist for ruby?

    - by cartoonfox
    What open source (preferably gem-based) parser-generator options do I have in Ruby? I've used (flex&bison)|(lex&yacc) from C in the past, and I'm comfortable with BNF-style specifications. I've heard of treetop, but it looks a bit alien and verbose compared to yacc... Purpose: I want to convert my text markup language to a BNF and generate the parsing code. I think it's a better strategy than my first-order solution: http://github.com/dafydd/semantictext/blob/master/lib/semantictext/rich_text_parser.rb

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  • MonoRail - How to grab records where a column isn't null

    - by Justin
    Hey, In MonoRail/Active Record if I want to grab all records that have a certain column equal to null, I can do: public static Category[] AllParentCategories() { return (FindAllByProperty("Parent.Id", null)); } However, what if I want to grab all records where that column doesn't equal null? I can't figure out how to do that using this FindAllByProperty method, is there another method that is more flexible or a way to grab records using a linq-like querying language? Thanks, Justin

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  • Max Daily Budget exceeded and Billing Status "Changing Daily Budget"

    - by draftpik
    We've exceeded the Max Daily Budget for our app, but we can't increase the budget due to a serious flaw in Google's billing system. Google App Engine and Google Wallet do not have very capable support for multiple sign-in. As a result, I went to change the budget, but it used the wrong Google Wallet account (a different Google Account I was signed in as). I had to go back and try again, but now our GAE app shows the following status: Billing Status: Changing Daily Budget Your account has been locked while we process your budget changes. If you were redirected to Google Checkout but did not complete the process, your settings will remain unchanged. (You will be able to make changes to your budget settings again once the outstanding payment is processed.) Now I'm completely prevented from making any billing changes, our app is shut off (over quota), and I have NOTHING I can do to fix it. This is a seriously fundamental flaw in App Engine's billing system and Google Wallet integration. Has anyone run into this before? Is there a workaround anyone is aware of? Right now, our production app is completely down thanks to this issue. Any help you can offer would be greatly appreciated? If you're from Google and you might be able to help on the backend, our app id is "nhldraftpik". Thanks! Brian

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  • Why hasn't MSSQL made a WHERE clause mandatory by default?

    - by Josh Einstein
    It seems like a no brainer to me. I've heard countless stories about people forgetting the WHERE clause in an UPDATE or DELETE and trashing an entire table. I know that careless people shouldn't be issuing queries directly and all that... and that there are legitimate cases where you want to affect all rows, but wouldn't it make sense to have an option on by default that requires such queries to be written like: UPDATE MyTable SET MyColumn = 0 WHERE * Or without changing the language, UPDATE MyTable SET MyColumn = 0 WHERE 1 = 1 -- tacky, I know

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  • identifier token keyword antlr parser

    - by batman_for
    How to handle the case where the token 'for' is used in two different situations in the language to parse? Such as statement and as a "parameter" as the following example: echo for print example for i in {0..10..2} do echo "Welcome $i times" done Output: for print example Welcome 0 times Welcome 2 times Welcome 4 times Welcome 6 times Welcome 8 times Welcome 10 times Thanks.

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  • wcf trying to set up tracing to debug, not writing to log file

    - by joey j
    here's my web.config, running a WCF service in an application on IIS7, but nothing is being written to the specified file. permission on the file has been granted for everyone. </listeners> I can add a service reference just fine. I then try to call the service from a windows app and, after a few minutes, get an error on the machine running the windows app "Client is unable to finish the security negotiation within the configured timeout (00:00:00). The current negotiation leg is 1 (00:00:00)." but absolutely nothing is written to the trace log file specified in config. Is there something else I need to do to enable tracing? thanks for your help EDIT: "sources" section now matches the section recommended here: http://msdn.microsoft.com/en-us/library/aa702726.aspx I've added the "diagnostics and the event viewer shows: "Message Logging has been turned on. Sensitive information may be logged in the clear, even if it was encrypted on the wire: for example, message bodies. Process Name: w3wp Process ID: 1784 " but the log file is still empty

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  • Webcam capture and convert to avi

    - by Spidfire
    Im trying to make a program that captures a video from the webcam and sound from the microphone but im getting stuck at the part where ive try to make a movie out of still images ive heard you need to use directshow but it doesnt jet work for me Does someone know a good piece of example code that captures video and sound and can encode it to a file (divx or something like that) ? or some suggestions where to look so i can build it myself (if a other programming language is better for this im happy to know it early. )

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  • How to properly document programming languages?

    - by roydukkey
    Where can I find information on how to properly document a programming language? What I mean is that there seems to be a standard way to document code. php.net and api.jquery.com seem to document there code the a similar way. For example, the trim() description on php.net. string trim ( string $str [, string $charlist ] ) And likewise on jquery.com .animate( properties, [ duration ], [ easing ], [ callback ] ) Does anyone even know what this syntax is called?

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  • Google Translate translates inline Javascript Code

    - by Matt
    Hi, I have some PHP code that sends a section of html code including some inline Javascript code by curl to google. When i get it back from Google translated into the language that i chose, the Javascript code has been translated too. Any ideas as to how i can stop Google translating my inline JavaScript code? Thanks, M

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  • delete a file in protected mode env(like windows xp)

    - by JGC
    hi I write a program to delete a file from somewhere of my harddisk in 8086 but when i use int 21h (ah=41h) an error happens and carry set to 1.and I cannot delete that. does anyone know what can I do? I think it should be from protected mode which does not allow my program to delete another file.I want the answer and language is not matter.

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  • operator "new" returning a non-local heap pointer for only one class ?

    - by KaluSingh Gabbar
    Language : C++ Platform : Windows Server 2003 I have an exe calling a DLL, in which when I allocate (new) the memory for class A (which is in DLL) it returns me a non-local heap pointer. I try to new other classes which are in DLL and "new" returns a valid heap pointer for them, its only Class A which is not being allocated properly. I am on windows and validating the heap by this function call : _CrtIsValidHeapPointer ( (const void *) pPtr ) I am seriously confused why this only happens with new-ing Class A and no other class ? (All Native Code)

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  • Generate and merge data with python multiprocessing

    - by Bobby
    I have a list of starting data. I want to apply a function to the starting data that creates a few pieces of new data for each element in the starting data. Some pieces of the new data are the same and I want to remove them. The sequential version is essentially: def create_new_data_for(datum): """make a list of new data from some old datum""" return [datum.modified_copy(k) for k in datum.k_list] data = [some list of data] #some data to start with #generate a list of new data from the old data, we'll reduce it next newdata = [] for d in data: newdata.extend(create_new_data_for(d)) #now reduce the data under ".matches(other)" reduced = [] for d in newdata: for seen in reduced: if d.matches(seen): break #so we haven't seen anything like d yet seen.append(d) #now reduced is finished and is what we want! I want to speed this up with multiprocessing. I was thinking that I could use a multiprocessing.Queue for the generation. Each process would just put the stuff it creates on, and when the processes are reducing the data, they can just get the data from the Queue. But I'm not sure how to have the different process loop over reduced and modify it without any race conditions or other issues. What is the best way to do this safely? or is there a different way to accomplish this goal better?

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  • Is Prince the best way to create PDFs in Ruby on Rails?

    - by Angela
    After several Google searches, it appears that the way to create PDFs in Rails from HTML and CSS (versus a new markup language) is to use Prince. With licensing at $3800 for my non-big-commercial app, I'm wondering if this is, in fact, consensus or people have an alternative they can share the whats and hows.

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  • Financial Charts / Graphs in Ruby or Python

    - by Eric the Red
    What are my best options for creating a financial open-high-low-close (OHLC) chart in a high level language like Ruby or Python? While there seem to be a lot of options for graphing, I haven't seen any gems or eggs with this kind of chart. http://en.wikipedia.org/wiki/Open-high-low-close_chart (but I don't need the moving average or Bollinger bands) JFreeChart can do this in Java, but I'd like to make my codebase as small and simple as possible. Thanks!

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  • Click to show more - maybe JS?

    - by Luke
    I am not sure what language or how to do this, but I am looking to have a word on a page, and when clicked, it will reveal more underneath. If it is clicked again, that stuff will hide away again? Any ideas?

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  • How can I add multiple pre-commit SVN Hooks

    - by Alister Bulman
    I've got several pre-commit hooks that I would like to run before each commit. Right now, they are all just shell-scripts, so I know i could just concatenate them to get them all to run. In the future though, additional scripts may be written in Perl, PHP, or some other language as well. How can I run several different scripts as part of a single pre-commit hook?

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