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• Silent Printing of PDF From Within Java

  - by Paul Reiners

  We are looking into silent printing of PDF documents from within Java. The printing will be invoked from the desktop and not through a browser so we cannot use JavaScript. PDF Renderer is an operational solution but their rendering quality is not acceptable. iText does not seem to be pluggable with the Java print service. There are some commercial Java libraries, jPDFPrint by Qoppa, JPedal, and ICEpdf which we have not tried out yet. Does anybody have any experience with PDF silent printing from Java?

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• What's the right way to use idlestartup on python 2.6.5?

  - by user210481

  Idlestartup is analogous to pythonstartup variable, but for IDLE, instead of command line. But it seems not to work properly. I'm using python 2.6.5 on Windows. I have the following script assigned to it: from pprint import pprint import sys newPath = 'C:\\Python26\test') sys.path.append(newPath) print "initial config loaded" Both variables Idlestartup and pythonstartup are assigned to the same file (script above). When running IDLE, pprint and sys are NOT available, the final message is NOT printed, but newPath was added to sys.path. Running the command line, pprint and sys are available, the final message is printed and newPath was added to sys.path. Is it a bug? Am I doing something wrong? Thanks

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• Find the closest vector

  - by Alexey Lebedev

  Hello! Recently I wrote the algorithm to quantize an RGB image. Every pixel is represented by an (R,G,B) vector, and quantization codebook is a couple of 3-dimensional vectors. Every pixel of the image needs to be mapped to (say, "replaced by") the codebook pixel closest in terms of euclidean distance (more exactly, squared euclidean). I did it as follows: class EuclideanMetric(DistanceMetric): def __call__(self, x, y): d = x - y return sqrt(sum(d * d, -1)) class Quantizer(object): def __init__(self, codebook, distanceMetric = EuclideanMetric()): self._codebook = codebook self._distMetric = distanceMetric def quantize(self, imageArray): quantizedRaster = zeros(imageArray.shape) X = quantizedRaster.shape[0] Y = quantizedRaster.shape[1] for i in xrange(0, X): print i for j in xrange(0, Y): dist = self._distMetric(imageArray[i,j], self._codebook) code = argmin(dist) quantizedRaster[i,j] = self._codebook[code] return quantizedRaster ...and it works awfully, almost 800 seconds on my Pentium Core Duo 2.2 GHz, 4 Gigs of memory and an image of 2600*2700 pixels:( Is there a way to somewhat optimize this? Maybe the other algorithm or some Python-specific optimizations.

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• Clearcase: findmerge usage.

  - by Keshav

  Hi, I have a branch B1 and another branch B2. I want all files/subfolders (recursively) inside a particular folder X (and not on entire VOB) on B1 to be merged onto B2. What exact findmerge command do I need to use? The below commands will work for entire vob or if I run them by getting into the directory in question, that will suffice for me? cleartool findmerge . -type dir -nc -fver .../dev/LATEST -merge cleartool findmerge . -nc -type file -fver .../dev/LATEST -print Thanks a lot in advance.

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• PhysX SDK - error LNK2019: unresolved external symbol when compiling "wavefront.cpp"

  - by user370102

  Hi all, I'm using the PhysX SDK and I'm trying to load an .obj file with the WavefrontObj object which is defined by the files "wavefront.h/.cpp", localized in the samples directory. When I'm compiling my project, I got this error: 1Linking... 1wavefront.obj : error LNK2019: unresolved external symbol "char * __cdecl FindMediaFile(char const *,char *)" (?FindMediaFile@@YAPADPBDPAD@Z) referenced in function "public: void __thiscall WAVEFRONT::InPlaceParser::SetFile(char const *)" (?SetFile@InPlaceParser@WAVEFRONT@@QAEXPBD@Z) 1C:\Users\Nicolas\Documents\GI05\CSED451 - Computer Graphics\ToyFK_Project\Debug\ToyFK_Project.exe : fatal error LNK1120: 1 unresolved externals I guess I forgot to link a library or something but I really can't find what... It's driving me crazy!!! Does somebody have an idea? Thank you

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• JQuery: Specify placement of error messages inline using Metadata and Validate plugins

  - by jalperin

  I'm doing form validation using JQuery with the validate and metadata plugins. I'm using the metadata plugin so I can specify the rules and messages inline in the html form instead of in the javascript in the page . I'm getting an error when I try to specify the location of the error message using errorPlacement. (If I specify it in the section it works fine, but not if I specify it inline.) Here's what my html looks like: <input name="list" id="list1" type="checkbox" validate="{required:true, minlength:1, messages:{required:'Please select at least one newsletter.', minlength:'Please select at least one newsletter.'}, errorPlacement: function(error, element) { error.appendTo('#listserror');} }"> As reported by the validate debug function, the error is: "error.appendTo is not a function." It works fine if I specify it in the section like this: $().ready(function() { $("#subscribeForm").validate({ errorPlacement: function(error, element) { if (element.attr("name") == "list" ) error.appendTo("#listserror"); else error.insertAfter(element); } }); });

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• Kohana3 ORM save problem

  - by Bob0101

  Hi, Can anyone help me with Kohana ORM. I can take out name and value. I can give them new values and I try to save them back to base, but in phpmyadmin i can see still old values for these option attributes. What is wrong with this code (it works and echos right value but i can't see it in db): $option = ORM::factory('draft') ->where('user_id', '=', $user_id) ->find() ->draft_options ->where('name', '=', $_POST['name']) ->find(); $option->name = $_POST['name']; $option->value = $_POST['value']; $option->save(); if ($option->saved()) echo Kohana::debug($option->value);

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• xsd:datetime and XmlGregorianCalendar causes NullPointerException

  - by Draemon

  The following works: public Date getDate() { return date; } and produces something like: <date>2010-03-23T17:43:50.879Z</date> And I can use an XmlGregorianCalendar to return xsd:date or xsd:time types fine: @XmlSchemaType(name="date") public XmlGregorianCalendar getDate() { return date; } which produces something like: <date>2010-03-23</date> But trying to return xsd:datetime like so: @XmlSchemaType(name="datetime") public XmlGregorianCalendar getDate() { return date; } Causes this stack trace: java.lang.NullPointerException at com.sun.xml.bind.v2.model.impl.RuntimeBuiltinLeafInfoImpl.checkXmlGregorianCalendarFieldRef(RuntimeBuiltinLeafInfoImpl.java:864) at com.sun.xml.bind.v2.model.impl.RuntimeBuiltinLeafInfoImpl.access$200(RuntimeBuiltinLeafInfoImpl.java:111) at com.sun.xml.bind.v2.model.impl.RuntimeBuiltinLeafInfoImpl$13.print(RuntimeBuiltinLeafInfoImpl.java:536) ...snip... at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) at java.lang.Thread.run(Thread.java:619) Which doesn't mention my code at all. I'm using tomcat 6.0.24, java 1.6.0_16-b01

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• How can I sort a Perl array of array of hashes?

  - by srk

  @aoaoh; $aoaoh[0][0]{21} = 31; $aoaoh[0][0]{22} = 31; $aoaoh[0][0]{23} = 17; for $k (0 .. $#aoaoh) { for $i(0.. $#aoaoh) { for $val (keys %{$aoaoh[$i][$k]}) { print "$val=$aoaoh[$i][$k]{$val}\n"; } } } The output is: 22=31 21=31 23=17 but i expect it to be 21=31 22=31 23=17 Please tell me where is this wrong. Also how do I sort the values so that i get the output as 23=17 22=31 21=31 (if 2 keys have same value then key with higher value come first)

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• WCF Callback Contract Fiddler Debugging

  - by DavyMac23

  I'm trying to debug a WCF self-hosted service utilizing callbacks. Every 1/2 I make a callback to a SL3 app to display the latest changes (yes, there are tons of changes every 1/2 second). There are 3 services, one has new data every 1/2 second, one has new data every second, and another has new data every hour. I've set all of my timeouts, Send, Receive, Open and Close to 2 days 23 hours and 23 minutes, but I still get time out errors on the service side when I go to issue the callback. I'm using Fiddler and I notice that my service that has new data every hour is still showing up every 10 seconds. Fiddlier shows a Body length of -1, then 10 seconds later it changes to 0 and the response is HTTP 200, but the overall elapsed time is 10 seconds. What's going on here?

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• How is a new programming language actually formed/created ?

  - by hory.incpp

  Fortran-Algol-Cpl-Bcpl-C-C++-Java ..... Seems like every language is built upon an ancestor language. My question : New languages extend parent ones or there is some kind of a trick? e.g. System.out.print() in Java ; is it actually printf() in C, and so on (printf is actually .. in Cpl)? If so, doesn't this make every further language be slower and need more memory? What separates a new language from a framework?

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• polymorphism pass instantiated base to deriver

  - by Eric

  I was wondering how to do this, consider the following classes public class Fruit { public string Name { get; set; } public Color Color { get; set; } } public class Apple : Fruit { public Apple() { } } How can I instantiate a new fruit but upcast to Apple, is there a way to instantiate a bunch of Fruit and make them apples with the name & color set. Do I need to manually deep copy? Of course this fails Fruit a = new Fruit(); a.Name = "FirstApple"; a.Color = Color.Red; Apple wa = a as Apple; System.Diagnostics.Debug.Print("Apple name: " + wa.Name); Do I need to pass in a Fruit to the AppleCTor and manually set the name and color( or 1-n properties) Is there an better design to do this?

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• Convert matched string of UTF-8 values to UTF-8 characters in Ruby

  - by user1475154

  Trying to convert output from a rest_client GET to the characters that are represented with escape sequences. Input: ..."sub_id":"\u0d9c\u8138\u8134\u3f30\u8139\u2b71"... (which I put in 'all_subs') Match: m = /sub_id\"\:\"([^\"]+)\"/.match(all_subs.to_str) [1] Print: puts m.force_encoding("UTF-8").unpack('U*').pack('U*') But it just comes out the same way I put it in. ie, "\u0d9c\u8138\u8134\u3f30\u8139\u2b71" However, if I convert a raw string of it: puts "\u0d9c\u8138\u8134\u3f30\u8139\u2b71".unpack('U*').pack('U*') The output is perfect as "??????"

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• STL map--> sort by value?

  - by Charlie Epps

  Hi I wonder how can I implement the STL map sorting by value. For example, I have a map m map<int, int>; m[1] = 10; m[2] = 5; m[4] = 6; m[6] = 1; and then.. I'd like to sort that with the m's value. So, if I print the map, I'd like to get the result like m[6] = 1 m[2] = 5 m[4] = 6 m[1] = 10 this. How can I sort like this way? Is there any way that I can deal with the key and value with sorted values?

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• Strange beep when using cout

  - by Unknown

  Hello everyone, today when I was working on some code of mine I came across a beeping sound when printing a buffer to the screen. Here's the mysterious character that produces the beep: '' I don't know if you can see it, but my computer beeps when I try to print it like this: cout<<(char)7<<endl; Another point of interest is that the 'beep' doesn't originate from my on board beeper, but from my headphone/speaker Is this just my computer or there something wrong with the cout function? EDIT: But then why does printing this character produce the beep sound? does that mean that I could send other such characters through the cout function to produce different effects?

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• Trouble getting Flash socket policy file to work.

  - by Alex

  Basically I'm using Flash to connect to a Java server. Despite my Java application replying to the , in the Flash debug log it lists (not sure about the order as there are lots): * Security Sandbox Violation * Connection to 192.168.1.86:4049 halted - not permitted from http://127.0.0.1:8888/Current/wander.swf Warning: Timeout on xmlsocket://192.168.1.86:4049 (at 3 seconds) while waiting for socket policy file. This should not cause any problems, but see http://www.adobe.com/go/strict_policy_files for an explanation. Error: Request for resource at xmlsocket://192.168.1.86:4049 by requestor from http://127.0.0.1:8888/Current/wander.swf is denied due to lack of policy file permissions. What I don't understand is, the server (port 4049) receives the request, outputs the policy file and then closes the connection, surely it shouldn't time out? The policy file I'm using is: <?xml version="1.0"?> <cross-domain-policy><allow-access-from domain="*" to-ports="*" /> </cross-domain-policy>

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• App only spawns one thread

  - by tipu

  I have what I thought was a thread-friendly app, and after doing some output I've concluded that of the 15 threads I am attempting to run, only one does. I have if __name__ == "__main__": fhf = FileHandlerFactory() tweet_manager = TweetManager("C:/Documents and Settings/Administrator/My Documents/My Dropbox/workspace/trie/Tweet Search Engine/data/partitioned_raw_tweets/raw_tweets.txt.001") start = time.time() for i in range(15): Indexer(tweet_manager, fhf).start() Then in my thread-entry point, I do def run(self): print(threading.current_thread()) self.index() That results in this: <Indexer(Thread-3, started 1168)> So of 15 threads that I thought were running, I'm only running one. Any idea as to why? Edit: code

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• Find/parse server-side <?abc?>-like tags in html document

  - by Iggyhopper

  I guess I need some regex help. I want to find all tags like <?abc?> so that I can replace it with whatever the results are for the code ran inside. I just need help regexing the tag/code string, not parsing the code inside :p. <b><?abc print 'test' ?></b> would result in <b>test</b> Edit: Not specifically but in general, matching (<?[chars] (code group) ?>)

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• how to show all method and data when the object not has "__iter__" function in python..

  - by zjm1126

  i find a way : (1):the dir(object) is : a="['__class__', '__contains__', '__delattr__', '__delitem__', '__dict__', '__doc__', '__getattribute__', '__getitem__', '__hash__', '__init__', '__iter__', '__metaclass__', '__module__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__setitem__', '__str__', '__weakref__', '_errors', '_fields', '_prefix', '_unbound_fields', 'confirm', 'data', 'email', 'errors', 'password', 'populate_obj', 'process', 'username', 'validate']" (2): b=eval(a) (3)and it became a list of all method : ['__class__', '__contains__', '__delattr__', '__delitem__', '__dict__', '__doc__', '__getattribute__', '__getitem__', '__hash__', '__init__', '__iter__', '__metaclass__', '__module__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__setitem__', '__str__', '__weakref__', '_errors', '_fields', '_prefix', '_unbound_fields', 'confirm', 'data', 'email', 'errors', 'password', 'populate_obj', 'process', 'username', 'validate'] (3)then show the object's method,and all code is : s='' a=eval(str(dir(object))) for i in a: s+=str(i)+':'+str(object[i]) print s but it show error : KeyError: '__class__' so how to make my code running . thanks

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• What's the best way to measure and track performance over various calls at runtime?

  - by bitcruncher

  Hello. I'm trying to optimize the performance of my code, but I'm not familiar with xcode's debuggers or debuggers in general. Is it possible to track the execution time and frequency of calls being made at runtime? Imagine a chain of events with some recursive calls over a fraction of a second. What's the best way to track where the CPU spends most of its time? Many thanks. Edit: Maybe this is better asked by saying, how do I use the xcode debug tools to do a stack trace?

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• ruby in 100 minutes good_morning method issue

  - by user2525947

  I have been doing the Ruby in 100 minutes on the JumpStart labs website, and encountered a problem during part 5. I was asked to create a good_morning method that would print out a greeting such as 'Happy Monday, it's the 130 day of 2013'. Here is my current program: class PersonalChef def good_morning today = Date.today.strftime("%A") day_of_year = Date.today.yday puts "Happy#{today}! It is the #{day_of_year} day of year." return self end def make_toast(color) puts " Making your toast #{color}!" return self end def make_milkshake(flavor) puts " Making a #{flavor} milkshake!" return self end def make_eggs(quantity) puts " Making you #{quantity} eggs!" return self end end when I try to run the program load on irb( 'personal_chef.rb', frank = PersonalChef.new, frank.make_milkshake('chocolate'), etc, everything works fine until I try to type frank.good_morning into irb, which gives the following error message: NameError: uninitialized constant PersonalChef :: Date from personal_chef.rb:5: in good_morning from (irb):3 from /bin/irb:12:in '' Any help or information to help me solve this issue would be greatly appreciated. Thanks for your time!

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• Weird problem cucumber behaving differently when run with the debugger

  - by James

  When I run a cucumber test it executes the code thinking that a collection obtained inside of a controller via a has_many relationship on a model is empty when it isn't. I ran this same test but with the debugger turned and a breakpoint before the collection is used. When I print collection in the debugger at this breakpoint the collection is as it should be (not empty). Then I continue and the test executes as it should. With no debugger and breakpoints though, the test exectues as though the collection is empty. Has anyone had a problem like this/what did you do to fix it?

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• How to handle an "infinite" IEnumerable?

  - by Danvil

  A trivial example of an "infinite" IEnumerable would be IEnumerable<int> Numbers() { int i=0; while(true) { yield return i++; } } I know, that foreach(int i in Numbers().Take(10)) { Console.WriteLine(i); } and var q = Numbers(); foreach(int i in q.Take(10)) { Console.WriteLine(i); } both work fine (and print out the number 0-9). But are there any pitfalls when copying or handling expressions like q? Can I rely on the fact, that they are always evaluated "lazy"? Is there any danger to produce an infinite loop?

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• php5 , how makes templates?

  - by oussama17

  I am currently developing a social network using PHP5 without any framework , I create the template by this method , every time I put the header -content -footer but I found that the previous template still there , how can I make templates with this method and show me the path to the best method to play with templates in PHP5.public function affiche($afficheTPL){ $this->registry->getObject('template')->addTemplateBit('hello', 'hellop.tpl.php'); $this->registry -> getObject('template') -> buildFromTemplates($afficheTPL.'/header.tpl.php', $afficheTPL.'/main.tpl.php', $afficheTPL.'/footer.tpl.php'); $this->registry -> getObject('template') -> parseOutput(); print $this -> registry -> getObject('template') -> getPage() -> getContentToPrint(); }

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• Recommend an algorithms exercise book?

  - by Parappa

  I have a little book called Problems on Algorithms by Ian Parberry which is chock full of exercises related to the study of algorithms. Can anybody recommend similar books? What I am not looking for are recommendations of good books related to algorithms or the theory of computation. Introduction to Algorithms is a good one, and of course there's the Knuth stuff. Ideally I want to know of any books that are light on instructional material and heavy on sample problems. In a nutshell, exercise books. Preferably dedicated to algorithms rather than general logic or other math problems. By the way, the Parberry book does not seem to be in print, but it is available as a PDF dowload.

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