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  • java.util.Random zero argument enquiry

    - by deerb
    I am trying to code a game following instructions contained in an OU TMA document which read: In the constructor, write code to assign a new instance of Random to ran which you should create using the Random class's zero argument constructor Will this code work? Random ran = new Random(0) ; I am a relative newbie to Java, and I don't understand exactly what the instructions mean

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  • What are some tricks I can use with macros?

    - by Sasha
    In our legacy code, as well as our modern code, we use macros to perform nifty solutions like code generations, etc. And we make use of both the # and ## operators. I am curious how other developers use macros to do cool things, if they use them at all.

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  • using jquery.noConflict()

    - by user548192
    Hi All, I have two files. HTML and .js files. in code.js, I have written jquery code and in HTML file, I am including code.js as following: jQuery.noConflict(); var $jcode = jQuery; in code.js, I have written following: jcode(document).ready(function() { jcode.interval(checkForms, 2000); }); When I run it, it gives me error as can not read property of interval undefined. I think there is something wrong with my usage of noConflict. Can you please help? Thanks

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  • How do you put an "IF DEBUG" condition in a c# program?

    - by xarzu
    How do you put an "IF DEBUG" condition in a c# program so that, at run time, it will ignore a set of code if you are running in Debug mode and yet, execute a block of code if the program is not running in debug mode? A situation where this can be used is if a time stamp is taken at the start of a block and another time stamp is taken at the end. THey will hardly differ at run time. Yet, if you are stepping through the code in debug mode, they will differ a lot, and error conditions in an "if block" might be kicked off leading to the untimely (pun) execution of some code.

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  • Local variable and Try/Catch

    - by 3D-kreativ
    I get an error, a red line below the variable intAge in the if-statement in the code. It says the variable is local, but how could it be local when it is declared in the beginning of the code? Does it have to do with the Try/Catch part? The reason why my code looks like it does, is just beacuse I have to use a Try/Catch in the code for this task. Preciate some suggestions to solve this in a similiar and correct way? Thanks! int intAge; try { intAge = int.Parse(age); } catch (Exception) { MessageBox.Show("Enter an age in numbers!","Error!"); } finally { } // Check input if (intAge < 1) { inputOk = false; errorMessage = "Please enter 1 or higher!"; }

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  • Java: "implements Runnable" vs. "extends Thread"

    - by user65374
    From what time I've spent with threads in Java, I've found these two ways to write threads. public class ThreadA implements Runnable { public void run() { //Code } } //with a "new Thread(threadA).start()" call public class ThreadB extends Thread { public ThreadB() { super("ThreadB"); } public void run() { //Code } } //with a "threadB.start()" call Is there any significant difference in these two blocks of code?

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  • How to conduct an interview for a development position remotely?

    - by sharptooth
    Usually we run interviews in office. We have a room with a table, the interviewee and one or two interviewers sit at the table, interviewers ask questions, often accompanied with code snippets on paper, the interviewee (hopefully) answers them, writes code snippets to illustrate his point. Usually it's something like an interviewer writes about five lines of C++ code and asks some specific question - quite a little code. Now we need to do the same remotely. We will be in our office and the interviewee will be far away - we are asked to help hire a person for another office located abroad. Of course we can use some technology for voice calls, but I'm afraid it's the most we can count on. I see a whole set of obstacles here: how to write illustration code snippets and exchange them efficiently? what to do to compensate for the fact that we're not native English speakers and the interviewees might or might be not native English speakers (I'm afraid this can make conversation significantly harder)? Are there any best practices for this situation? How could we address the obstacles listed? What other things should we consider to run the interview most efficiently?

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  • Getting data from the next row in Oracle cursor

    - by Chaotic_one
    Hi, I'm building nested tree and I need to get data for the next row in cursor, using Oracle. And I still need current row, so looping forward is not a solution. Example: OPEN emp_cv FOR sql_stmt; LOOP FETCH emp_cv INTO v_rcod,v_rname,v_level; EXIT WHEN emp_cv%NOTFOUND; /*here lies the code for getting v_next_level*/ if v_next_level > v_level then /*code here*/ elsif v_next_level < v_level then /*code here*/ else /*code here*/ end if; END LOOP; CLOSE emp_cv;

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  • Python performance profiling (file close)

    - by user1853986
    First of all thanks for your attention. My question is how to reduce the execution time of my code. Here is the relevant code. The below code is called in iteration from the main. def call_prism(prism_input_file,random_length): prism_output_file = "path.txt" cmd = "prism %s -simpath %d %s" % (prism_input_file,random_length,prism_output_file) p = os.popen(cmd) p.close() return prism_output_file def main(prism_input_file, number_of_strings): ... for n in range(number_of_strings): prism_output_file = call_prism(prism_input_file,z[n]) ... return I used statistics from the "profile statistics browser" when I profiled my code. The "file close" system command took the maximum time (14.546 seconds). The call_prism routine is called 10 times. But the number_of_strings is usually in thousands, so, my program takes lot of time to complete. Let me know if you need more information. By the way I tried with subprocess, too. Thanks.

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  • Segfaults with singletons

    - by Ockonal
    Hello, I have such code: // Non singleton class MyLogManager { void write(message) {Ogre::LogManager::getSingletonPtr()->logMessage(message);} } class Utils : public singleton<Utils> { MyLogManager *handle; MyLogManager& getHandle { return *handle; } }; namespace someNamespace { MyLogManager &Log() { return Utils::get_mutable_instance().getHandle(); } } int main() { someNamespace::Log().write("Starting game initializating..."); } In this code I'm using boost's singleton (from serialization) and calling Ogre's log manager (it's singleton-type too). The program fails at any trying to do something with Ogre::LogManager::getSingletonPtr() object with code User program stopped by signal (SIGSEGV) I checked that getSingletonPtr() returns address 0x000 But using code Utils::get_mutable_instance().getHandle().write("foo") works good in another part of program. What's wrong could be there with calling singletons?

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  • examples of good concurrent programs meant to scale

    - by vishr
    I am looking for seminal and excellent examples of libraries and projects that emulate the good practices of the Java Concurrency in Practice book. The book is marvelous. However, I think supplementing this book reading with code reviews of projects and libraries that make use of the concurrency APIs effectively is necessary to drive the concepts into the brain. One good example of what I am looking for is https://code.google.com/p/concurrentlinkedhashmap/ Can folks help me with finding exemplary, well written code that use the concurrency api well?

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  • How do I most efficienty check the unique elements in a list?

    - by alex
    let's say I have a list li = [{'q':'apple','code':'2B'}, {'q':'orange','code':'2A'}, {'q':'plum','code':'2A'}] What is the most efficient way to return the count of unique "codes" in this list? In this case, the unique codes is 2, because only 2B and 2A are unique. I could put everything in a list and compare, but is this really efficient?

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  • Using Git or Mercurial, how would you know when you do a clone or a pull, no one is checking in file

    - by Jian Lin
    Using Git or Mercurial, how would you know when you do a clone or a pull, no one is checking in files (pushing it)? It can be important that: 1) You never know it is in an inconsistent state, so you try for 2 hours trying to debug the code for what's wrong. 2) With all the framework code -- potentially hundreds of files -- if some files are inconsistent with the other, can't the rake db:migrate or script/generate controller cause some damage or inconsistencies to the code base?

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  • C# how to do <enter> on barcode?

    - by RJ1516
    I have a combination of ItemNo and LotNo value. Example : ItemNo: I123 LotNo : L12345 Barcode Value is: "I123L12345" I want to put the value of ItemNo to txtItemNo.Text and LotNo to txtLotNo.Text How can I instruct the barcode to do Carriage Return or Enter so that I can be able to input 2 values on one Barcode scan. My barcode supports CODE 128, CODE 3of9 and CODE 93. Thanks in advance.

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  • how to use q.js promises to work with multiple asynchronous operations

    - by kimsia
    Note: This question is also cross-posted in Q.js mailing list over here. i had a situation with multiple asynchronous operations and the answer I accepted pointed out that using Promises using a library such as q.js would be more beneficial. I am convinced to refactor my code to use Promises but because the code is pretty long, i have trimmed the irrelevant portions and exported the crucial parts into a separate repo. The repo is here and the most important file is this. The requirement is that I want pageSizes to be non-empty after traversing all the dragged'n dropped files. The problem is that the FileAPI operations inside getSizeSettingsFromPage function causes getSizeSettingsFromPage to be async. So I cannot place checkWhenReady(); like this. function traverseFiles() { for (var i=0, l=pages.length; i<l; i++) { getSizeSettingsFromPage(pages[i], calculateRatio); } checkWhenReady(); // this always returns 0. } This works, but it is not ideal. I prefer to call checkWhenReady just ONCE after all the pages have undergone this function calculateRatio successfully. function calculateRatio(width, height, filename) { // .... code pageSizes.add(filename, object); checkWhenReady(); // this works but it is not ideal. I prefer to call this method AFTER all the `pages` have undergone calculateRatio // ..... more code... } How do I refactor the code to make use of Promises in Q.js?

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  • Error in value of default parameter [Bug in Visual C++ 2008?]

    - by HellBoy
    I am facing following issue while trying to use template in my code I have some C++ code which i call from C functions. Problem is I am getting different values in the following code for statement 1 and 2. Type id : unsigned int statement 1 : 4 statement 2 : 1 C++ Code : template <typename T> void func(T* value, unsigned int len = sizeof(T)) { cout << "Type id : " << typeid(T).name() << endl; cout << "statement 1 " << sizeof(T) << endl; cout << "statement 2 " << len << endl; } template <typename T> void func1(T data) { T val = data; func(&val); } C Code : void test(void *ptr, unsigned int len) { switch(len) { case 1: func1(*(static_cast<uint32_t *>(ptr)) break; } } This happens only on windows. On Linux it works fine.

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  • Python to C# Conversion of RGBA values not working

    - by clangers
    I'm currently converting some python code to C#, and I'm having an issue with the RGBA C# libraries # Original Python Code: d = math.sqrt( (x - size/2.0)**2 + (y - size/2.0)**2 ) rgbVal = int(200*d/md + 50) rgba = (0,0,0, 255 - rgbVal) img.putpixel((x,y), rgba) // My C# Code double d = Math.Sqrt(Math.Pow((x - DotSize / 2.0), 2) + Math.Pow((y - DotSize / 2.0), 2)); int rgbVal = (int) (200 * d / md + 50); Color color = Color.FromArgb(255 - rgbVal, 0, 0, 0); // ** ERROR ** img.SetPixel(x,y, color); At both instances of the code d is equal to 106 and md is equal to 53. However the resulting rgbVal value is 450. This would obviously mean that 255 - 450 is -195, which causes an error to be thrown as each individual value must be between 0 and 255. Anyone have any idea how I can fix this. Please note that the data is the same when running both the python and C# versions.

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  • twisted DeferredList parallel Image Download

    - by bell007
    This is code: http://www.dpaste.de/Ij0S/ 1,if there is a erorr (networking erorr,or Unhandled error in Deferred), the code stop. I need this code running until all urls finish request. (May be the parallel function not work? ) 2,when I write image to local filesystem, if meet erorr, there images may not complete. Thanks!

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  • Parse error after upgrading to PHP 5.3

    - by poer
    I have a php code that works well in PHP 5.2 but throwing "Parse error: syntax error, unexpected '}'" after upgrading to PHP 5.3. When I use echo/print or heredocs to print all the HTML part of the code, the error is gone. My question is, why this error occurred? Is this mean that in PHP 5.3 we are no longer allowed to put HTML code inside PHP code? This is my php code: function pk_stt2_admin_print_delete_form(){ global $wpdb; if ( isset($_POST['delete_terms']) && !empty($_POST['delete_terms']) ){ $msg = 'Search terms'; $success = pk_stt2_db_delete_searchterms( $_POST['delete_terms'] ); } elseif ( isset($_POST['delete_all']) ){ $msg = 'All search terms'; $success = pk_stt2_db_delete_searchterms( 'delete_all_terms' ); } else { ?> <div id="message" class="updated fade"> <p> Please enter the search terms to be deleted, separate them with a comma. </p> </div> <?php } if ( $success ){ ?> <div id="message" class="updated fade"> <p> <?php echo $msg; ?> have been deleted, <?php echo $success; ?> rows effected. </p> </div> <?php } else { ?> <div id="message" class="updated fade"> <p> Failed to delete search terms. </p> </div> <?php } } Thanks.

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  • How to interpret binary data as an integer?

    - by StackedCrooked
    The codebase at work contains some code that looks roughly like this: #define DATA_LENGTH 64 u_int32 SmartKey::SerialNumber() { unsigned char data[DATA_LENGTH]; // ... initialized data buffer return *(u_int32*)data; } This code works correctly, but GCC gives the following warning: warning: dereferencing pointer ‘serialNumber’ does break strict-aliasing rules Can someone explain this warning? Is this code potentially dangerous? How can it be improved?

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  • help with sql query - in access 2007

    - by Gold
    hi i have 2 tables table items has 144602 records table A has 27721 records code in items = BAR8 in A i want to show all records that equal i try this: SELECT Items.Code, A.BAR8 FROM Items INNER JOIN A ON Items.Code = A.BAR8; and i get 28048 records !!! i need to get 27721 , how to do it ? thank's in advance

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