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  • Scipy Negative Distance? What?

    - by disappearedng
    I have a input file which are all floating point numbers to 4 decimal place. i.e. 13359 0.0000 0.0000 0.0001 0.0001 0.0002` 0.0003 0.0007 ... (the first is the id). My class uses the loadVectorsFromFile method which multiplies it by 10000 and then int() these numbers. On top of that, I also loop through each vector to ensure that there are no negative values inside. However, when I perform _hclustering, I am continually seeing the error, "Linkage Z contains negative values". I seriously think this is a bug because: I checked my values, the values are no where small enough or big enough to approach the limits of the floating point numbers and the formula that I used to derive the values in the file uses absolute value (my input is DEFINITELY right). Can someone enligten me as to why I am seeing this weird error? What is going on that is causing this negative distance error? ===== def loadVectorsFromFile(self, limit, loc, assertAllPositive=True, inflate=True): """Inflate to prevent "negative" distance, we use 4 decimal points, so *10000 """ vectors = {} self.winfo("Each vector is set to have %d limit in length" % limit) with open( loc ) as inf: for line in filter(None, inf.read().split('\n')): l = line.split('\t') if limit: scores = map(float, l[1:limit+1]) else: scores = map(float, l[1:]) if inflate: vectors[ l[0]] = map( lambda x: int(x*10000), scores) #int might save space else: vectors[ l[0]] = scores if assertAllPositive: #Assert that it has no negative value for dirID, l in vectors.iteritems(): if reduce(operator.or_, map( lambda x: x < 0, l)): self.werror( "Vector %s has negative values!" % dirID) return vectors def main( self, inputDir, outputDir, limit=0, inFname="data.vectors.all", mappingFname='all.id.features.group.intermediate'): """ Loads vector from a file and start clustering INPUT vectors is { featureID: tfidfVector (list), } """ IDFeatureDic = loadIdFeatureGroupDicFromIntermediate( pjoin(self.configDir, mappingFname)) if not os.path.exists(outputDir): os.makedirs(outputDir) vectors = self.loadVectorsFromFile( limit, pjoin( inputDir, inFname)) for threshold in map( lambda x:float(x)/30, range(20,30)): clusters = self._hclustering(threshold, vectors) if clusters: outputLoc = pjoin(outputDir, "threshold.%s.result" % str(threshold)) with open(outputLoc, 'w') as outf: for clusterNo, cluster in clusters.iteritems(): outf.write('%s\n' % str(clusterNo)) for featureID in cluster: feature, group = IDFeatureDic[featureID] outline = "%s\t%s\n" % (feature, group) outf.write(outline.encode('utf-8')) outf.write("\n") else: continue def _hclustering(self, threshold, vectors): """function which you should call to vary the threshold vectors: { featureID: [ tfidf scores, tfidf score, .. ] """ clusters = defaultdict(list) if len(vectors) > 1: try: results = hierarchy.fclusterdata( vectors.values(), threshold, metric='cosine') except ValueError, e: self.werror("_hclustering: %s" % str(e)) return False for i, featureID in enumerate( vectors.keys()):

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  • Resizing an image using mouse dragging (C#)

    - by Gaax
    Hi all. I'm having some trouble resizing an image just by dragging the mouse. I found an average resize method and now am trying to modify it to use the mouse instead of given values. The way I'm doing it makes sense to me but maybe you guys can give me some better ideas. I'm basically using the distance between the current location of the mouse and the previous location of the mouse as the scaling factor. If the distance between the current mouse location and the center of of the image is less than the distance between previous mouse location and the center of the image then the image gets smaller, and vice-versa. With the code below I'm getting an Argument Exception (invalid parameter) when creating the new bitmap with the new height and width and I really don't understand why... any ideas? private static Image resizeImage(Image imgToResize, System.Drawing.Point prevMouseLoc, System.Drawing.Point currentMouseLoc) { int sourceWidth = imgToResize.Width; int sourceHeight = imgToResize.Height; float dCurrCent = 0; //Distance between current mouse location and the center of the image float dPrevCent = 0; //Distance between previous mouse location and the center of the image float dCurrPrev = 0; //Distance between current mouse location and the previous mouse location int sign = 1; System.Drawing.Point imgCenter = new System.Drawing.Point(); float nPercent = 0; imgCenter.X = imgToResize.Width / 2; imgCenter.Y = imgToResize.Height / 2; // Calculating the distance between the current mouse location and the center of the image dCurrCent = (float)Math.Sqrt(Math.Pow(currentMouseLoc.X - imgCenter.X, 2) + Math.Pow(currentMouseLoc.Y - imgCenter.Y, 2)); // Calculating the distance between the previous mouse location and the center of the image dPrevCent = (float)Math.Sqrt(Math.Pow(prevMouseLoc.XimgCenter.X,2) + Math.Pow(prevMouseLoc.Y - imgCenter.Y, 2)); // Calculating the sign value if (dCurrCent >= dPrevCent) { sign = 1; } else { sign = -1; } nPercent = sign * (float)Math.Sqrt(Math.Pow(currentMouseLoc.X - prevMouseLoc.X, 2) + Math.Pow(currentMouseLoc.Y - prevMouseLoc.Y, 2)); int destWidth = (int)(sourceWidth * nPercent); int destHeight = (int)(sourceHeight * nPercent); Bitmap b = new Bitmap(destWidth, destHeight); // exception thrown here Graphics g = Graphics.FromImage((Image)b); g.InterpolationMode = InterpolationMode.HighQualityBicubic; g.DrawImage(imgToResize, 0, 0, destWidth, destHeight); g.Dispose(); return (Image)b; }

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  • Algorithm for dividing very large numbers

    - by pocoa
    I need to write an algorithm(I cannot use any 3rd party library, because this is an assignment) to divide(integer division, floating parts are not important) very large numbers like 100 - 1000 digits. I found http://en.wikipedia.org/wiki/Fourier_division algorithm but I don't know if it's the right way to go. Do you have any suggestions?

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  • Delphi : Sorted List

    - by Sethu
    I need to sort close to a 1,00,000 floating point entries in delphi. I am new to delphi and would like to know if there are any readymade solutions available. I tried a few language provided constructs and they take an inordinate amount of time to run to completion.(a 5-10 sec execution time is fine for the application)

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  • Multiple file descriptors to the same file, C

    - by Gigi
    I have a multithreaded application that is opening and reading the same file (not writing). I am opening a different file descriptor for each thread (but they all point to the same file). Each thread then reads the file and may close it and open it again if EOF is reached. Is this ok? If I perform fclose() on a file descriptor does it affect the other file descritptors that point to the same file?

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  • z-index of DIV positioned on top of another div

    - by Elie
    I have two div containers which are structured as follows: <div class="outer-div"> <img src="images/point.png" class="img-a1"> <img src="images/point.png" class="img-a2"> Lots of text goes here. </div> <div class="outer-div"> <img src="images/point.png" class="img-a1"> <img src="images/point.png" class="img-b2"> Some more text goes here </div> The styles associated with this are as follows: .outer-div { position: absolute; top: 0px; left: 0px; width: 500px; } .img-a1 { float:left; z-index:-1; position:relative; margin-left: 250px; margin-bottom: 100px; } .img-b1 { float:right; z-index:-1; position:relative; margin-left: 250px; margin-bottom: 100px; } img-a2 { float:left; z-index:-1; position:relative; margin-left: 400px; margin-bottom: 200px; } img-b2 { float:right; z-index:-1; position:relative; margin-left: 400px; margin-bottom: 200px; } The result of this is to produce something like the following, where ... is the text from div-a and ||| is the text from div-b: .....||||| .....||||| .. || .. || However, since the second div is placed immediately above the first div, none of the text in the second div can be selected, although it can be seen since there is just empty space, and a 1x1 px image above it. Is there a way to get the text from the lower div to be selectable, without making the upper div unselectable?

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  • mingw 3.4.5 missing dlfcn.h?

    - by lurscher
    Hi, is it possible that my mingw 3.4.5 installation is faulty? or is this provided on some other library floating around? in case you are wondering, dlfcn.h is where stuff like dlopen and dlclose are defined, so it should be pretty standard

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  • Dynamically inserted input elements not showing up in ActionResult's FormCollection parameter

    - by roosteronacid
    I am adding input elements to a view, dynamically, using JavaScript. But I am unable to find those inputs in my ActionResult's FormCollection parameter...: public ActionResult Del(FormCollection fc) I am able to find static input elements in the View. And using FireBug in Mozilla FireFox, I can see that the inputs are inside of the form element, in the DOM, and are not floating around somewhere random. How can I access these inputs?

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  • Update local sqlite database from Adobe AIR application

    - by Kiran
    I have a local sqlite database which is created by an IE addon. The sqlite database cannot be updated from a Adobe AIR application which I use as a frontend. The exception is as follows SQLError:'Error #3132:Datatype type mismatch.',details:'could not convert floating point value to integer without loss of data.',operation:'execute',detailID:'2302'

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  • link nasm program for mac os x

    - by Fry Constantine
    i have some problems with linking nasm program for macos: GLOBAL _start SEGMENT .text _start: mov ax, 5 mov bx, ax mov [a], ebx SEGMENT .data a DW 0 t2 DW 0 fry$ nasm -f elf test.asm fry$ ld -o test test.o -arch i386 ld: warning: in test.o, file was built for unsupported file format which is not the architecture being linked (i386) ld: could not find entry point "start" (perhaps missing crt1. fry$ nasm -f macho test.asm fry$ ld -o test test.o -arch i386 ld: could not find entry point "start" (perhaps missing crt1.o) can anyone help me?

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  • Regular Expression for Decimal or Blank

    - by Phil P
    Sorry for the potentially dumb question but I am trying to pull together a regular expression that will allow: A number with 1 or 2 numbers before a decimal point, and 0-6 numbers after the decimal point. However I also need to allow the field to be blank if so required. Valid Examples 0.952321 1.20394 12.12 25 Blank Invalid Examples 123.45678 1.1234567 Please can anyone help?

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  • How to access a simple file or folder from Tomcat webapps folder

    - by Ankur
    I want to be able to access a folder from my tomcat webapps folder so that I can give someone a URL like: http://localhost:8080/myFolder/myFile.f And in a web browser if they point to this they should start downloading the file. But in reality I get a 404 error when I try to point to this location. How can I solve this or get around it.

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  • Winforms: calling entry form function from a different class

    - by samy
    I'm kinda new to programming and got a question on what is a good practice. I created a class that represents a ball and it has a function Jump() that use 2 timers and get the ball up and down. I know that in Winforms you got to call Invalidate() every time you want to repaint the screen, or part of it. I didn't find a good way to do that, so I reference the form in my class, and called Invalidate() inside my ball class every time I need to repaint to ball movement. (this works but I got a feeling that this is not a good practice) Here is the class I created: public class Ball { public Form1 parent;//----> here is the reference to the form public Rectangle ball; Size size; public Point p; Timer timerBallGoUp = new Timer(); Timer timerBallGDown = new Timer(); public int ballY; public Ball(Size _size, Point _p) { size = _size; p = _p; ball = new Rectangle(p, size); } public void Jump() { ballY = p.Y; timerBallGDown.Elapsed += ballGoDown; timerBallGDown.Interval = 50; timerBallGoUp.Elapsed += ballGoUp; timerBallGoUp.Interval = 50; timerBallGoUp.Start(); } private void ballGoUp(object obj,ElapsedEventArgs e) { p.Y++; ball.Location = new Point(ball.Location.X, p.Y); if (p.Y >= ballY + 50) { timerBallGoUp.Stop(); timerBallGDown.Start(); } parent.Invalidate(); // here i call parent.Invalidate() 1 } private void ballGoDown(object obj, ElapsedEventArgs e) { p.Y--; ball.Location = new Point(ball.Location.X, p.Y); if (p.Y <= ballY) { timerBallGDown.Stop(); timerBallGoUp.Start(); } parent.Invalidate(); // here i call parent.Invalidate() 2 } } I'm wondring if there is a better way to do that? (sorry for my english)

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  • Counting FLOPS/GFLOPS in program - CUDA

    - by msx
    Already finished my application which multiplies CRS matrix and vector (SpMV) and the only thing to do now is to count FLOPS my application did. In my opinion it's really hard to estimate number of floating point operation in case of sparse matrix - vector multiplication, because the number of multiplies in one row is really "jumpy" or fluent. I only tried to measure time using "cudaprof" ( available in ./CUDA/bin directory) - it works fine. Any sugestions and instruction pastes appreciated !

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  • Docking *inside* an editor

    - by Andy Thomas-Cramer
    I have a document type which has multiple presentations. Say I want to display the document in an RCP editor with a customizable subset of those presentations, in a layout chosen by the user. One option that has come up is docking-like behavior for the panels inside an individual editor, with drag-and-drop, resizing, closing, maybe rollover and floating. Clearly this would need usability testing, but my question here is of feasibility. Are there any existing libraries or e4 plans to support behavior like this?

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  • jQueryUI Tabs: how to keep them on a single line?

    - by Andi
    Hi all, Maybe my question is wired: is there a way to prevent jQueryUI tabs from floating if browser window is too small? Explanation: I have a simple horizontal tab using CSS only. The content is floating but not the tabs. Important: there is no width set manually, the current width is taken automatically. Here is the code: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <style type="text/css"> #tabs ul { white-space: nowrap; } #tabs ul li { display: inline; white-space: nowrap; } </style> <title>Tabs-CSS</title> </head> <body> <div class="demo"> <div id="tabs"> <ul> <li><a href="#tabs-1">Preloaded</a></li> <li><a href="ajax/content1.html">Tab 1</a></li> <li><a href="ajax/content2.html">Tab 2</a></li> <li><a href="ajax/content3-slow.php">Tab 3 (slow)</a></li> <li><a href="ajax/content4-broken.php">Tab 4 (broken)</a></li> <li><a href="ajax/content4-broken.php">Tab 4 (broken)</a></li> <li><a href="ajax/content4-broken.php">Tab 4 (broken)</a></li> <li><a href="ajax/content4-broken.php">Tab 4 (broken)</a></li> <li><a href="ajax/content4-broken.php">Tab 4 (broken)</a></li> </ul> <div id="tabs-1"> <p>Proin elit arcu, rutrum commodo, vehicula tempus, commodo a, risus. Curabitur nec arcu. Donec sollicitudin mi sit amet mauris. Nam elementum quam ullamcorper ante. Etiam aliquet massa et lorem. Mauris dapibus lacus auctor risus. Aenean tempor ullamcorper leo. Vivamus sed magna quis ligula eleifend adipiscing. Duis orci. Aliquam sodales tortor vitae ipsum. Aliquam nulla. Duis aliquam molestie erat. Ut et mauris vel pede varius sollicitudin. Sed ut dolor nec orci tincidunt interdum. Phasellus ipsum. Nunc tristique tempus lectus.</p> </div> </div> </div> </body> </html> This is exactly what I want. Next step: add jQueryUI Tab as unobtrusive Javascript. For example like this: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js" type="text/javascript"></script> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.1/jquery-ui.min.js"></script> <link type="text/css" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.7.2/themes/ui-lightness/jquery-ui.css" rel="stylesheet"/> <style type="text/css"> #tabs ul { white-space: nowrap; } #tabs ul li { display: inline; white-space: nowrap; } </style> <title>Tabs-CSS</title> </head> <body> <div class="demo"> <div id="tabs"> <ul> <li><a href="#tabs-1">Preloaded</a></li> <li><a href="ajax/content1.html">Tab 1</a></li> <li><a href="ajax/content2.html">Tab 2</a></li> <li><a href="ajax/content3-slow.php">Tab 3 (slow)</a></li> <li><a href="ajax/content4-broken.php">Tab 4 (broken)</a></li> <li><a href="ajax/content4-broken.php">Tab 4 (broken)</a></li> <li><a href="ajax/content4-broken.php">Tab 4 (broken)</a></li> <li><a href="ajax/content4-broken.php">Tab 4 (broken)</a></li> <li><a href="ajax/content4-broken.php">Tab 4 (broken)</a></li> </ul> <div id="tabs-1"> <p>Proin elit arcu, rutrum commodo, vehicula tempus, commodo a, risus. Curabitur nec arcu. Donec sollicitudin mi sit amet mauris. Nam elementum quam ullamcorper ante. Etiam aliquet massa et lorem. Mauris dapibus lacus auctor risus. Aenean tempor ullamcorper leo. Vivamus sed magna quis ligula eleifend adipiscing. Duis orci. Aliquam sodales tortor vitae ipsum. Aliquam nulla. Duis aliquam molestie erat. Ut et mauris vel pede varius sollicitudin. Sed ut dolor nec orci tincidunt interdum. Phasellus ipsum. Nunc tristique tempus lectus.</p> </div> </div> </div> <script type="text/javascript"> //<![CDATA[ $(function() { $("#tabs").tabs({ ajaxOptions: { error: function(xhr, status, index, anchor) { $(anchor.hash).html("Couldn't load this tab. We'll try to fix this as soon as possible. If this wouldn't be a demo."); }, } }); }); $(function() { $("#innertabs").tabs({ ajaxOptions: { error: function(xhr, status, index, anchor) { $(anchor.hash).html("Couldn't load this tab. We'll try to fix this as soon as possible. If this wouldn't be a demo."); } } }); }); //]]> </script> </body> </html> Now I can see that the tabbar floats on minimizing the browser window. And there are some ugly effect with the tabs jumping around. My main questions is: can I avoid floating the tabbar and keep all tabs on one single line? Kind regards, Andi

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  • How to compute fmod in C#?

    - by Danvil
    For given floating point numbers x and a, I would like to compute r (and n) such that x = a*n + r . In C/C++ this function is called fmod. However I do not see a convenient function in .NET. Math.DivRem is only for integers ...

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  • jQueryUI Tabs: how too keep them on a single line?

    - by Andi
    Hi all, Maybe my question is wired: is there a way to prevent jQueryUI tabs from floating if browser window is too small? Explanation: I have a simple horizontal tab using CSS only. The content is floating but not the tabs. Important: there is no width set manually, the current width is taken automatically. Here is the code: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <style type="text/css"> #tabs ul { white-space: nowrap; } #tabs ul li { display: inline; white-space: nowrap; } </style> <title>Tabs-CSS</title> </head> <body> <div class="demo"> <div id="tabs"> <ul> <li><a href="#tabs-1">Preloaded</a></li> <li><a href="ajax/content1.html">Tab 1</a></li> <li><a href="ajax/content2.html">Tab 2</a></li> <li><a href="ajax/content3-slow.php">Tab 3 (slow)</a></li> <li><a href="ajax/content4-broken.php">Tab 4 (broken)</a></li> <li><a href="ajax/content4-broken.php">Tab 4 (broken)</a></li> <li><a href="ajax/content4-broken.php">Tab 4 (broken)</a></li> <li><a href="ajax/content4-broken.php">Tab 4 (broken)</a></li> <li><a href="ajax/content4-broken.php">Tab 4 (broken)</a></li> </ul> <div id="tabs-1"> <p>Proin elit arcu, rutrum commodo, vehicula tempus, commodo a, risus. Curabitur nec arcu. Donec sollicitudin mi sit amet mauris. Nam elementum quam ullamcorper ante. Etiam aliquet massa et lorem. Mauris dapibus lacus auctor risus. Aenean tempor ullamcorper leo. Vivamus sed magna quis ligula eleifend adipiscing. Duis orci. Aliquam sodales tortor vitae ipsum. Aliquam nulla. Duis aliquam molestie erat. Ut et mauris vel pede varius sollicitudin. Sed ut dolor nec orci tincidunt interdum. Phasellus ipsum. Nunc tristique tempus lectus.</p> </div> </div> </div> </body> </html> This is exactly what I want. Next step: add jQueryUI Tab as unobtrusive Javascript. For example like this: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js" type="text/javascript"></script> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.1/jquery-ui.min.js"></script> <link type="text/css" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.7.2/themes/ui-lightness/jquery-ui.css" rel="stylesheet"/> <style type="text/css"> #tabs ul { white-space: nowrap; } #tabs ul li { display: inline; white-space: nowrap; } </style> <title>Tabs-CSS</title> </head> <body> <div class="demo"> <div id="tabs"> <ul> <li><a href="#tabs-1">Preloaded</a></li> <li><a href="ajax/content1.html">Tab 1</a></li> <li><a href="ajax/content2.html">Tab 2</a></li> <li><a href="ajax/content3-slow.php">Tab 3 (slow)</a></li> <li><a href="ajax/content4-broken.php">Tab 4 (broken)</a></li> <li><a href="ajax/content4-broken.php">Tab 4 (broken)</a></li> <li><a href="ajax/content4-broken.php">Tab 4 (broken)</a></li> <li><a href="ajax/content4-broken.php">Tab 4 (broken)</a></li> <li><a href="ajax/content4-broken.php">Tab 4 (broken)</a></li> </ul> <div id="tabs-1"> <p>Proin elit arcu, rutrum commodo, vehicula tempus, commodo a, risus. Curabitur nec arcu. Donec sollicitudin mi sit amet mauris. Nam elementum quam ullamcorper ante. Etiam aliquet massa et lorem. Mauris dapibus lacus auctor risus. Aenean tempor ullamcorper leo. Vivamus sed magna quis ligula eleifend adipiscing. Duis orci. Aliquam sodales tortor vitae ipsum. Aliquam nulla. Duis aliquam molestie erat. Ut et mauris vel pede varius sollicitudin. Sed ut dolor nec orci tincidunt interdum. Phasellus ipsum. Nunc tristique tempus lectus.</p> </div> </div> </div> <script type="text/javascript"> //<![CDATA[ $(function() { $("#tabs").tabs({ ajaxOptions: { error: function(xhr, status, index, anchor) { $(anchor.hash).html("Couldn't load this tab. We'll try to fix this as soon as possible. If this wouldn't be a demo."); }, } }); }); $(function() { $("#innertabs").tabs({ ajaxOptions: { error: function(xhr, status, index, anchor) { $(anchor.hash).html("Couldn't load this tab. We'll try to fix this as soon as possible. If this wouldn't be a demo."); } } }); }); //]]> </script> </body> </html> Now I can see that the tabbar floats on minimizing the browser window. And there are some ugly effect with the tabs jumping around. My main questions is: can I avoid floating the tabbar and keep all tabs on one single line? Kind regards, Andi

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  • Why is FLT_MIN equal to zero on OS X?

    - by Nick Forge
    limits.h specifies limits for non-floating point math types, e.g. INT_MIN and INT_MAX. These values are the most negative and most positive values that you can represent using an int. In float.h, there are definitions for FLT_MIN and FLT_MAX. If you do the following: NSLog(@"%f %f", FLT_MIN, FLT_MAX); You get the following output: FLT_MIN = 0.000000, FLT_MAX = 340282346638528859811704183484516925440.000000 FLT_MAX is equal to a really large number, as you would expect, but why does FLT_MIN equal zero?

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  • What are programming lost arts?

    - by pavpanchekha
    Have you ever programmed raw machine code (not for class)? Examined a hex dump with just a hex editor (or, heck, without)? Written your own software floating-point library? Division library? Written a non-school-assignment in Lisp or Forth? What sort of "lost arts" have been forgotten? And what reason (if any) would there be to resurrect them?

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