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• Classifying captured data in unknown format?

  - by monch1962

  I've got a large set of captured data (potentially hundreds of thousands of records), and I need to be able to break it down so I can both classify it and also produce "typical" data myself. Let me explain further... If I have the following strings of data: 132T339G1P112S 164T897F5A498S 144T989B9B223T 155T928X9Z554T ... you might start to infer the following: possibly all strings are 14 characters long the 4th, 8th, 10th and 14th characters may always be alphas, while the rest are numeric the first character may always be a '1' the 4th character may always be the letter 'T' the 14th character may be limited to only being 'S' or 'T' and so on... As you get more and more samples of real data, some of these "rules" might disappear; if you see a 15 character long string, then you have evidence that the 1st "rule" is incorrect. However, given a sufficiently large sample of strings that are exactly 14 characters long, you can start to assume that "all strings are 14 characters long" and assign a numeric figure to your degree of confidence (with an appropriate set of assumptions around the fact that you're seeing a suitably random set of all possible captured data). As you can probably tell, a human can do a lot of this classification by eye, but I'm not aware of libraries or algorithms that would allow a computer to do it. Given a set of captured data (significantly more complex than the above...), are there libraries that I can apply in my code to do this sort of classification for me, that will identify "rules" with a given degree of confidence? As a next step, I need to be able to take those rules, and use them to create my own data that conforms to these rules. I assume this is a significantly easier step than the classification, but I've never had to perform a task like this before so I'm really not sure how complex it is. At a guess, Python or Java (or possibly Perl or R) are possibly the "common" languages most likely to have these sorts of libraries, and maybe some of the bioinformatic libraries do this sort of thing. I really don't care which language I have to use; I need to solve the problem in whatever way I can. Any sort of pointer to information would be very useful. As you can probably tell, I'm struggling to describe this problem clearly, and there may be a set of appropriate keywords I can plug into Google that will point me towards the solution. Thanks in advance

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• Template problems: No matching function for call

  - by Nick Sweet

  I'm trying to create a template class, and when I define a non-member template function, I get the "No matching function for call to randvec()" error. I have a template class defined as: template <class T> class Vector { T x, y, z; public: //constructors Vector(); Vector(const T& x, const T& y, const T& z); Vector(const Vector& u); //accessors T getx() const; T gety() const; T getz() const; //mutators void setx(const T& x); void sety(const T& y); void setz(const T& z); //operations void operator-(); Vector plus(const Vector& v); Vector minus(const Vector& v); Vector cross(const Vector& v); T dot(const Vector& v); void times(const T& s); T length() const; //Vector<T>& randvec(); //operators Vector& operator=(const Vector& rhs); friend std::ostream& operator<< <T>(std::ostream&, const Vector<T>&); }; and the function in question, which I've defined after all those functions above, is: //random Vector template <class T> Vector<double>& randvec() { const int min=-10, max=10; Vector<double>* r = new Vector<double>; int randx, randy, randz, temp; const int bucket_size = RAND_MAX/(max-min +1); temp = rand(); //voodoo hackery do randx = (rand()/bucket_size)+min; while (randx < min || randx > max); r->setx(randx); do randy = (rand()/bucket_size)+min; while (randy < min || randy > max); r->sety(randy); do randz = (rand()/bucket_size)+min; while (randz < min || randz > max); r->setz(randz); return *r; } Yet, every time I call it in my main function using a line like: Vector<double> a(randvec()); I get that error. However, if I remove the template and define it using 'double' instead of 'T', the call to randvec() works perfectly. Why doesn't it recognize randvec()? P.S. Don't mind the bit labeled voodoo hackery - this is just a cheap hack so that I can get around another problem I encountered.

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• Is it possible to shuffle a 2D matrix while preserving row AND column frequencies?

  - by j_random_hacker

  Suppose I have a 2D array like the following: GACTG AGATA TCCGA Each array element is taken from a small finite set (in my case, DNA nucleotides -- {A, C, G, T}). I would like to randomly shuffle this array somehow while preserving both row and column nucleotide frequencies. Is this possible? Can it be done efficiently? [EDIT]: By this I mean I want to produce a new matrix where each row has the same number of As, Cs, Gs and Ts as the corresponding row of the original matrix, and where each column has the same number of As, Cs, Gs and Ts as the corresponding column of the original matrix. Permuting the rows or columns of the original matrix will not achieve this in general. (E.g. for the example above, the top row has 2 Gs, and 1 each of A, C and T; if this row was swapped with row 2, the top row in the resulting matrix would have 3 As, 1 G and 1 T.) It's simple enough to preserve just column frequencies by shuffling a column at a time, and likewise for rows. But doing this will in general alter the frequencies of the other kind. My thoughts so far: If it's possible to pick 2 rows and 2 columns so that the 4 elements at the corners of this rectangle have the pattern XY YX for some pair of distinct elements X and Y, then replacing these 4 elements with YX XY will maintain both row and column frequencies. In the example at the top, this can be done for (at least) rows 1 and 2 and columns 2 and 5 (whose corners give the 2x2 matrix AG;GA), and for rows 1 and 3 and columns 1 and 4 (whose corners give GT;TG). Clearly this could be repeated a number of times to produce some level of randomisation. Generalising a bit, any "subrectangle" induced by a subset of rows and a subset of columns, in which the frequencies of all rows are the same and the frequencies of all columns are the same, can have both its rows and columns permuted to produce a valid complete rectangle. (Of these, only those subrectangles in which at least 1 element is changed are actually interesting.) Big questions: Are all valid complete matrices reachable by a series of such "subrectangle rearrangements"? I suspect the answer is yes. Are all valid subrectangle rearrangements decomposable into a series of 2x2 swaps? I suspect the answer is no, but I hope it's yes, since that would seem to make it easier to come up with an efficient algorithm. Can some or all of the valid rearrangements be computed efficiently? This question addresses a special case in which the set of possible elements is {0, 1}. The solutions people have come up with there are similar to what I have come up with myself, and are probably usable, but not ideal as they require an arbitrary amount of backtracking to work correctly. Also I'm concerned that only 2x2 swaps are considered. Finally, I would ideally like a solution that can be proven to select a matrix uniformly at random from the set of all matrices having identical row frequencies and column frequencies to the original. I know, I'm asking for a lot :)

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• Can first descendent be selected directly?

  - by Ben Huh

  I am currently using find() and first() method to select the first descendent element from each of the <div> elements that contains the parent class. But I find this quite cumbersome since find() method would produce a set of matched elements before the first element is being picked. The following is the skeleton of my code: HTML <div class=parent> <ul> <li>random characters</li> <li>random characters</li> <li>random characters</li> <li>random characters</li> </ul> </div> <div class=parent> <ul> <li>random characters</li> <li>random characters</li> <li>random characters</li> <li>random characters</li> </ul> </div> <div class=non-parent> <ul> <li>random characters</li> <li>random characters</li> <li>random characters</li> <li>random characters</li> </ul> </div> <div class=parent> <ul> <li>random characters</li> <li>random characters</li> <li>random characters</li> <li>random characters</li> </ul> </div> // .....the list continues Javascript $('.parent').each(function() { $(this).find('ul li').first().css('color', 'red'); // do other stuff within each loop }); I have seen people using $(".parent li:first") selector. But, because I am doing it in a loop, I am not sure how or whether if this could be done and would like some advice. Thanks.

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• Here's what I want... what do I tell my IT guy I need?

  - by Jason

  I work in the graphics department for a real estate brokerage, and we deal with a lot of photos. Agents take the photos, upload them to me, I touch up and standardize the photos, then I add them to an in-house server for future use by the graphics dept. I'd like to make the "sanitized" photo files available to the agents to use when they want, but I don't want the agents poking around the graphics department's files (things get misplaced, renamed and messed up in a hurry). What would be perfect is if we could create a read-only "mirror" (correct term?) of that server that could be accessed by the agents as needed, but which wouldn't feed back into our "sanitized" file system. What do I tell the office IT guy I need (platform-agnostically, because I don't know what he's running)? I never get to see him face-to-face, so I've got to word this as carefully and explicitly as possible. Thoughts? Thanks in advance for your feedback

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• Determining what action an NPC will take, when it is partially random but influenced by preferences?

  - by lala

  I want to make characters in a game perform actions that are partially random but also influenced by preferences. For instance, if a character feels angry they have a higher chance of yelling than telling a joke. So I'm thinking about how to determine which action the character will take. Here are the ideas that have come to me. Solution #1: Iterate over every possible action. For each action do a random roll, then add the preference value to that random number. The action with the highest value is the one the character takes. Solution #2: Assign a range of numbers to an action, with more likely actions having a wider range. So, if the random roll returns anywhere from 1-5, the character will tell a joke. If it returns 6-75, they will yell. And so on. Solution #3: Group all the actions and make a branching tree. Will they take a friendly action or a hostile action? The random roll (with preference values added) says hostile. Will they make a physical attack or verbal? The random roll says verbal. Keep going down the line until you reach the action. Solution #1 is the simplest, but hardly efficient. I think Solution #3 is a little more complicated, but isn't it more efficient? Does anyone have any more insight into this particular problem? Is #3 the best solution? Is there a better solution?

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• how to generate random bubbles from array of sprites in cocos2d?

  - by prakash s

  I am devoloping the bubble shooter game in cocos2d how to generate random bubbles from array of sprites here is my code (void)addTarget { CGSize winSize = [[CCDirector sharedDirector] winSize]; //CCSprite *target = [CCSprite spriteWithFile:@"3.png" rect:CGRectMake(0, 0, 256, 256)]; NSMutableArray * movableSprites = [[NSMutableArray alloc] init]; NSArray *images = [NSArray arrayWithObjects:@"1.png", @"2.png", @"3.png", @"4.png",@"5.png",@"1.png",@"5.png", @"3.png", nil]; for(int i = 0; i < images.count; ++i) { NSString *image = [images objectAtIndex:i]; // generate random number based on size of array (array size is larger than 10) CCSprite*target = [CCSprite spriteWithFile:image]; float offsetFraction = ((float)(i+1))/(images.count+1); target.position = ccp(winSize.width*offsetFraction, winSize.height/2); target.position = ccp(350*offsetFraction, 460); [self addChild:target]; [movableSprites addObject:target]; //[target runAction:]; id actionMove = [CCMoveTo actionWithDuration:10 position:ccp(winSize.width/2,winSize. height/2)]; This code generating bubbles with *.png colour bubbles but i want to generate randomly because for shooting the bubbles by shooter class help me please id actionMoveDone = [CCCallFuncN actionWithTarget:self selector:@selector(spriteMoveFinished:)]; [target runAction:[CCSequence actions:actionMove, actionMoveDone, nil]]; } }

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• Hash of unique value = unique hash?

  - by Nebs

  Theoretically does hashing a unique value yield a unique value? Let's say I have a DB table with 2 columns: id and code. id is an auto-incrementing int and code is a varchar. If I do ... $code = sha1($id); ... and then store $code into the same row as $id. Will my code column be unique as well? What about if I append the current time? eg: $code = sha1($id . time()); Thanks.

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• Jquery Randomizing within Categories

  - by David Chase

  Hi, so here is my question in a situation if you will. i have 6 items in div classes which correspond to 3 categories something like this class ="boat" class ="car" class ="bike" class ="blueboat" class ="redcar" class ="greenbike" so is there a jquery/javascript approach with .addClass where when someone clicks on the button "Randomize" it addClass .mine to each one of the 3 categories ie blueboat.mine and redcar.mine and bike.mine but not boat or car or greenbike because they are in the same category? or another situation rather than .addClass use a jquery/javascript so when "Randomize" is clicked to randomly show 3 out of 6 items one in each category of boat,car,bike and hide the rest blueboat,redcar,greenbike. in this situation all 6 items are on the page when document is ready but with the randomize only 3 are left one from each category. please let me know if anyone has any ideas or needs further clarification any help is greatly appreciated. thank you -david

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• Flex Canvas child Randomly resizes

  - by BS_C3

  Hi! I have an application with a viewstack that contains all the components that need to be displayed. The navigation is defined in the main application. All the components are based on canvas. The main application looks like that: <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" xmlns:components="components.*"> <mx:VBox width="1024" height="100%" horizontalCenter="0" verticalGap="0" backgroundColor="#FFFFFF"> <mx:Image id="header" verticalAlign="top" /> <mx:ViewStack id="body" horizontalCenter="0" verticalCenter="0" width="100%" height="100%"> <components:HomePage id="hp" width="100%"/> <components:CollectionSelection id="cs" width="100%"/> <components:SearchEngine id="se" width="100%"/> <components:SearchResult id="sr" width="100%"/> <components:Tray id="tr" width="100%"/> <components:Order id="or" width="100%"/> </mx:ViewStack> <mx:Image id="footer" verticalAlign="bottom" maintainAspectRatio="false" width="100%"/> </mx:VBox> </mx:Application> I'm getting a strange behaviour from the TRAY component. Here's the code for component Tray (I've only left the display info): <mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml"> <mx:Image id="bg" horizontalCenter="0" verticalCenter="0" width="100%" height="100%" maintainAspectRatio="false"/> <mx:HBox width="100%"> <mx:Button x="20" y="20" label="BACK"/> <mx:Spacer width="100%"/> <mx:LinkBar itemClick="linkbar_itemClick(event)" styleName="GLBLinkBTN" separatorColor="#FFFFFF" separatorWidth="1" > <mx:dataProvider> <mx:Object label="CLEAR"/> <mx:Object label="LOGOUT"/> </mx:dataProvider> </mx:LinkBar> </mx:HBox> <mx:VBox id="mainBox" horizontalCenter="0" verticalCenter="0" verticalGap="0"> <mx:HBox width="100%" height="50" backgroundColor="#60524D" verticalAlign="bottom" paddingBottom="5"> <mx:Label styleName="TRTitle" paddingLeft="15"/> <mx:Spacer width="100%"/> <mx:Label styleName="TRItems" paddingRight="15"/> </mx:HBox> <mx:HorizontalList id="hlist" dataProvider="{TrayData.instance.itemsCollection}" columnCount="{TrayData.instance.hlistColumns}" rowCount="1" itemRenderer="components.TrayItem" horizontalScrollPolicy="off" rollOverColor="#FFFFFF" selectionColor="#FFFFFF" horizontalCenter="0" verticalCenter="0" borderStyle="none" horizontalScrollPosition="{TrayData.instance.hsPosition}" /> <mx:HBox width="100%" backgroundColor="#E7DDDB" height="40" verticalAlign="middle" paddingLeft="20" paddingRight="20"> <mx:Box width="25" verticalAlign="middle" horizontalAlign="left"> <mx:Button id="leftBtn" /> </mx:Box> <mx:Spacer width="100%"/> <mx:Box width="25" verticalAlign="middle" horizontalAlign="right"> <mx:Button id="rightBtn" /> </mx:Box> </mx:HBox> </mx:VBox> </mx:Canvas> All the components are displaying properly. However, sometimes, randomly, the vbox "mainBox" in the tray component is not displaying as it should: the horizontallist shrinks and instead of fully displaying its items, I get horizontal and vertical scrollbars for each item... I'm currently trying to reproduce this behaviour (to get a print screen) but right know, it's working fine... -_-' As soon as I get it work as it shouldn't, I'll upload an image. Here's the code for the itemRenderer (just in case...): <mx:VBox xmlns:mx="http://www.adobe.com/2006/mxml" > <mx:HBox width="100%" paddingTop="0" paddingBottom="0" paddingRight="3"> <mx:Spacer width="100%"/> <mx:Box width="14" height="14" verticalAlign="middle" horizontalAlign="center"> <mx:Button width="8" height="8"/> </mx:Box> </mx:HBox> <mx:VBox paddingLeft="20" paddingRight="20" verticalGap="15" paddingBottom="15"> <mx:Canvas id="thumbnail"> <mx:Image id="thumbnailBG" /> <mx:Image id="thumbnailIM" /> </mx:Canvas > <mx:VBox width="100%" verticalGap="7"> <mx:HBox width="100%" height="13"> <mx:Label width="74" opaqueBackground="#ECE5E2"/> <mx:Label paddingBottom="5"/> </mx:HBox> <mx:HBox width="100%" height="13"> <mx:Label width="74" opaqueBackground="#ECE5E2"/> <mx:Label /> </mx:HBox> <mx:HBox width="100%" height="13"> <mx:Label width="74" opaqueBackground="#ECE5E2"/> <mx:Label /> </mx:HBox> <mx:HBox width="100%" height="13"> <mx:Label width="74"opaqueBackground="#ECE5E2"/> <mx:Label /> </mx:HBox> <mx:HBox width="100%" height="13"> <mx:Label width="74" opaqueBackground="#ECE5E2"/> <mx:Label /> </mx:HBox> <mx:HBox width="100%" height="13"> <mx:Label width="74" opaqueBackground="#ECE5E2"/> <mx:Label /> </mx:HBox> <mx:HBox width="100%" height="13"> <mx:Label width="74" opaqueBackground="#ECE5E2"/> <mx:Label /> </mx:HBox> <mx:HBox width="100%" height="13"> <mx:Label width="74" opaqueBackground="#ECE5E2"/> <mx:Label /> </mx:HBox> </mx:VBox> <mx:Button /> </mx:VBox> </mx:VBox> Your help would really be appreciated. Regards, BS_C3

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• getline at a certain line for file IO

  - by BSchlinker

  Is there anyway to use getline to read a specific line within a file? For instance, to immediately read line #20? It seems inefficient to do any type of look to read and discard earlier lines. I know about fseek, but there is no guarantee that the records will be the same length on each line. I imagine this is simply what is required in order to find lines. After all, to know when the end of the line has been reached, it needs to find the break line character, so it makes sense for it to need to read each line. Just wondering if there was any quicker method.

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• Practical Uses of Fractals in Programming

  - by Sami

  Fractals have always been a bit of a mystery for me. What practical uses (beyond rendering to beautiful images) are there for fractals in the various programming problem domains? And please, don't just list areas that use them. I'm interested in specific algorithms and how fractals are used with those algorithms to solve something in practice. Please at least give a short description of the algorithm.

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• Randomly add buttons to Tkinter GUI?

  - by Zachary Brown

  How do I randomly add buttons to a Tkinter GUI? I need it to be able to create a button, then put it anywhere on the window, is this possible? I am using Python 2.6 on Windows.

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• Mail Reversing (Opposite of Forwarding)

  - by Duall

  I know mail can be forwarded, e.g. mail I receive will be sent to another account. However, can the reverse be true? That mail can be sent out and be delivered to another account before being sent to it's intended address. For instance: Guy #1 sends an e-mail to Guy #2 Guy #2 gets the e-mail, and passes it on to Guy #3 as well; mail forwarded. Guy #2 sends and e-mail to Guy #1 Guy #3 receives the e-mail on its way out. If this is possible, how would I go about this on an Exhange server 2007? And what would this be called anyways? It can't be mail reversing!

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• Gamma Distribution in Boost

  - by Kamchatka

  Hello, I'm trying to use the Gamma distribution from boost::math but it looks like it isn't possible to use it with boost::variate_generator. Could someone confirm that? Or is there a way to use it. I discovered that there is a boost::gamma_distribution undocumented that could probably be used too but it only allows to choose the alpha parameter from the distribution and not the beta. Thanks!

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• MATLAB is changing variables when I do not want it to.

  - by WVUstudent

  Here is my problem in a small bit of code used as an example, trial(0) function [] = trial(test) disp(test) if(test == 1) disp('test is one') test = 0; end disp(test) Matlab prints out this: 0 'test is one' 0 This is not my real code, there are over 500 lines of it, but this is a section of my code where the problem has risen. I have used the search function to see if I have been incrementing any variables anywhere, and have put in over 2 hours trying to see why MATLAB is changing my variables when I don't want it to.

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• Architecture of chatroulette

  - by user317163

  Could somebody explain to me the architecture behind chatroulette? I was thinking about a similar project that would only implement Audio support (for starters). Is the best way to set this up a flash server? If so, how should I go about getting into flash, will I need flex 4? I have some beginner experience with c++, c# and java but I have never developed anything for the web. I was also wondering how the randomizer matches up the participants. How would you code something like this. Im obviously pretty clueless here and I'd greatly appreciate some advice regarding this problem -- I don't expect copy and paste solutions. It would just be nice to hear how you guys would tackle this problem. Thank you very much

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• How to randomize a sorted list?

  - by Faken

  Here's a strange question for you guys, I have a nice sorted list that I wish to randomize. How would i go about doing that? In my application, i have a function that returns a list of points that describe the outline of a discretized object. Due to the way the problem is solved, the function returns a nice ordered list. i have a second boundary described in math and want to determine if the two objects intersect each other. I simply itterate over the points and determine if any one point is inside the mathematical boundary. The method works well but i want to increase speed by randomizing the point data. Since it is likely that that my mathematical boundary will be overlapped by a series of points that are right beside each other, i think it would make sense to check a randomized list rather than iterating over a nice sorted one (as it only takes a single hit to declare an intersection). So, any ideas on how i would go about randomizing an ordered list?

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• JUnit Test method with randomized nature

  - by Peter

  Hey, I'm working on a small project for myself at the moment and I'm using it as an opportunity to get acquainted with unit testing and maintaining proper documentation. I have a Deck class with represents a deck of cards (it's very simple and, to be honest, I can be sure that it works without a unit test, but like I said I'm getting used to using unit tests) and it has a shuffle() method which changes the order of the cards in the deck. The implementation is very simple and will certainly work: public void shuffle() { Collections.shuffle(this.cards); } But, how could I implement a unit test for this method. My first thought was to check if the top card of the deck was different after calling shuffle() but there is of course the possibility that it would be the same. My second thought was to check if the entire order of cards has changed, but again they could possibly be in the same order. So, how could I write a test that ensures this method works in all cases? And, in general, how can you unit test methods for which the outcome depends on some randomness? Cheers, Pete

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• Randomize files output in folder

  - by meep

  Hello Stackoverflow. How do I randomize the order of the files I get out of: string[] files = Directory.GetFiles("folder"); Thank you! :-)

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• Looking for interesing formula

  - by Thinker

  I'm creating a game, where players can make an alloy. To make it less predictable, and more interesting, I thought that durability and hardness of an alloy can't be calculated by simple formula, because it will be extremely easy to find extrema, where alloy have best statistics. So the questions is, is there any formula for a function, where extrema can be found only by investigating all points? Input values will be in percents: 0.0%-100.0%. I think, it should look like this: half sound wave

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• Thread-safty of boost RNG

  - by Maciej Piechotka

  I have a loop which should be nicely pararellized by insering one openmp pragma: boost::normal_distribution<double> ddist(0, pow(retention, i - 1)); boost::variate_generator<gen &, BOOST_TYPEOF(ddist)> dgen(rng, ddist); // Diamond const std::uint_fast32_t dno = 1 << i - 1; // #pragma omp parallel for for (std::uint_fast32_t x = 0; x < dno; x++) for (std::uint_fast32_t y = 0; y < dno; y++) { const std::uint_fast32_t diff = size/dno; const std::uint_fast32_t x1 = x*diff, x2 = (x + 1)*diff; const std::uint_fast32_t y1 = y*diff, y2 = (y + 1)*diff; double avg = (arr[x1][y1] + arr[x1][y2] + arr[x2][y1] + arr[x2][y2])/4; arr[(x1 + x2)/2][(y1 + y2)/2] = avg + dgen(); } (unless I make an error each execution does not depend on others at all. Sorry that not all of code is inserted). However my question is - are boost RNG thread-safe? They seems to refer to gcc code for gcc so even if gcc code is thread-safe it may not be the case for other platforms.

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• how to fadein LI elements randomly? (jquery)

  - by user366123

  Hi ive got a set of li with hover effect, what i want is when the page loads ALL the li fadein randomly. i don't want to shuffle them.....they should keep their ordering intact meaning 1,2,3,4,5.... just want to make them appear on the page randomly and stay there test page: http://humayunrehman.com/hovertest/

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• How to get arc4Sin() output into label/NSString

  - by Moshe

  I'm trying to take the output of arc4sin and put it into a label. (EDIT: You can ignore this and just post sample code, if this is too irrelevant.) I've tried: // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad { [super viewDidLoad]; NSString *number = [[NSString alloc] stringWithFormat: @"%@", arc4random() % 9]; label.text = number; } I've created an IBOutlet for "label" and connected it. What's wrong here?

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• Visual Basic Express 2008 Help

  - by khalidfazeli

  I have been given a task to: Develop a program where a child will be presented with picture of a fruit (one of five possible fruit) on the screen at the click of a start button. The child will then try to recognise the fruit and write its name in a specified place on the screen. On the click of a check button the name of the fruit written by the child will be checked by your program and if correct will reward the child with a suitable message. If the name presented by the child is not correct, a suitable message should be presented on a red background with the correct name of the fruit included in the message. so far I have managed to create a form with 5 different fruit pictures and a text box below them. a button at the bottom of the form then checks the results and presents a message box to tell them if they have passed or failed. Private Sub btnResults_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnResults.Click If txtApple.Text = "APPLE" And txtOrange.Text = "ORANGES" And txtStrawberry.Text = "STRAWBERRIES" And txtGrapes.Text = "GRAPES" And txtBanana.Text = "BANANAS" Then MsgBox("Congratulations! you got it all right!", MsgBoxStyle.OkOnly) End Else MsgBox("Incorrect, please try again", MsgBoxStyle.OkOnly) End End If End Sub but I can't get it to randomise the picture of the fruit, so it only displays one fruit at a time and checks against it. Any help is appreciated. Thanks

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