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• How to find out memory layout of your data structure implementation on Linux 64bit machine

  - by ajay

  In this article, http://cacm.acm.org/magazines/2010/7/95061-youre-doing-it-wrong/fulltext the author talks about the memory layouts of 2 data structures - The Binary Heap and the B-Heap and compares how one has better memory layout than the other. http://deliveryimages.acm.org/10.1145/1790000/1785434/figs/f5.jpg http://deliveryimages.acm.org/10.1145/1790000/1785434/figs/f6.jpg I want to get hands on experience on this. I have an implementation of a N-Ary Tree and I want to find out the memory layout of my data structure. What is the best way to come up with a memory layout like the one in the article? Secondly, I think it is easier to identify the memory layout if it is an array based implementation. If the implementation of a Tree uses pointers then what Tools do we have or what kind of approach is required to map it's memory layout? Thanks!

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• customvalidator can't find controltovalidate

  - by ravi

  iam having a problem finding a textbox inside createuserwizard which is inside a contentplaceholder i have a custom validator for this textbox ..now when i put this customvalidator outside createuser wizard it says "cannot find controltovalidate control id CaptchaValue " heres is a row inside my createuserwizard <CreateUserWizard......> : : : <tr> </td> </tr> : : : </CreateUserWizard> and i have a customevalidator outside createuserwizard <asp:CustomValidator ID="CustomValidator5" runat="server" ControlToValidate="CaptchaValue" ErrorMessage="Image value must match" ValidationGroup="CreateUserWizard1" EnableClientScript="False"></asp:CustomValidator>

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• Use jQuery to find div by background color

  - by maxsilver

  I'm trying to use jQuery to find the number of divs that are both visible, and have a background color of Green. (Normally I'd just add a class to the div, style it green, and check for that class in jQuery but in this instance, I can't actually change the markup of the page itself in any way) I currently have the visible div part working as : if( // if there are more than one visible div $('div.progressContainer:visible').length > 0 ){ I'd like to throw some kind of "and background color is green" selector in there. // not legit javascript if( // if there are more than one visible div, and its color is green $('div.progressContainer:visible[background-color:green]').length > 0 ){ Is it possible to do this?

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• TextMate can't find my RSpec gem in opt (from macports)

  - by sbwoodside

  I know I've had this problem before so I'm really frustrated. I've got the Ruby RSpec bundle installed for TextMate, but when I Run Behaviour Description or Run Focused Example I get this wonderful error: /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems.rb:827: in `report_activate_error': Could not find RubyGem rspec (>= 1.1.0) (Gem::LoadError) from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems.rb:261: in `activate' from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby /1.8/rubygems.rb:68:in `gem' from /Users/simon/Library/Application Support/TextMate/Bundles/Ruby RSpec.tmbundle/Support/lib/spec_mate.rb:13 from /tmp/temp_textmate.oWRPUR:3:in `require' from /tmp/temp_textmate.oWRPUR:3 (I added linebreaks to make it readable) I'm using macports so my rspec gem is installed in /opt/local/lib/ruby/gems/1.8/gems/. Why isn't it finding it? In Preferences Advanced Shell Variables my TM_RUBY is set to /opt/local/bin/ruby. I also tried the trick here: http://dnite.org/2007/8/28/textmate-and-your-environment-variables/ ... which didn't do anything.

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• Where can I find the F# runtime for Silverlight 4

  - by Mark Pearl

  I have been playing around with Silverlight & F# and tried to make a Silverlight 4 application in VS2010 Professional. When I try and compile my application I get the following error message... Error 12 F# runtime for Silverlight version v4.0 is not installed. Please go to http://go.microsoft.com/fwlink/?LinkId=177463 to download and install matching.. For the life of me I cannot find the runtime on this page or a place to download it. Does anyone know of the actual URL

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• Shark was unable to find symbol information for this address range - iPhone

  - by Elliot

  I'm trying to use Shark to determine which method(s) are taking the most time in my iPhone app. After sampling, I get this: Clicking the "!" button yields: Shark was unable to find symbol information for this address range. Typically this happens because the application was compiled without symbols or they have been subsequently stripped away. In Xcode, make sure the "Generate Debug Symbols" checkbox is selected (passes the -g flag to the compiler). Note that this does not affect code optimization, and does not typically alter performance significantly. However, the extra symbol information does consume significantly more space and may bloat the size of the executable. But I AM using the Debug option, and I am running on my Device. And Generate Debug Symbols IS checked. So what's wrong?

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• "Find nearest location" by Zip/Postal Code?

  - by codemonkey613

  I need a "find nearest location" on our website. Where visitor enters their zip/postal code, then they are redirected to specific webpage for our nearest location. We have forty USA and Canada locations. How can I build something like this? Could I do this with the Google Maps API? I already have a custom map on Google Maps. It's plotted with our locations. It would be nice to send Google Maps a command to say "what's our nearest location at __ zip code". Any suggestions?

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• Python/X11: find out if user switches virtual desktops

  - by Philip

  Hello everyone, I'm looking for a way to determine if the user switches virtual desktops under X11. I'm using Python with X11 libraries and PyGTK. I found some working examples in C, but I lack the expertise to translate them into Python, and I read the source code of several X11 pager applications (fbpanel, pypanel), but I can't seem to find what I'm looking for. Do I have to register for a signal? Using X11 or GTK? Do I have to busy-wait? I'm completely new to both X11 and GTK, so any hints/help would be greatly appreciated. Greets, Philip PS: My current efforts can be found here.

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• Microsoft ACE OLEDB provider throws could not find installable ISAM exception

  - by Michael Stoll

  I'm trying to read Excel spreadsheets with a 64bit Process. Therefore I use the 64 bit Version of Micorosft Access Database Engine 2010. The following code var cs = @"Provider=Microsoft.ACE.OLEDB.12.0;" + @"Data Source=C:\test.xls;" + @"Extended Properties=""Excel 14.0;"""); con = new OleDbConnection(cs); con.Open(); throw an Exception: Could not find installable ISAM Using google I found a lot of questions about this exception. But they refer to JET and seem not apply to my problem. Any recommendations?

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• Hibernate - PropertyNotFoundException: Could not find a getter for ...

  - by Ben Noland

  I have a class that looks like the following: public class MyClass { private String dPart1; public String getDPart1() { return dPart1; } public void setDPart1(String dPart1) { this.dPart1 = dPart1; } } My hibernate mapping file maps the property as follows: <property name="dPart1" not-null="true"/> I get the following error: org.hibernate.PropertyNotFoundException: Could not find a getter for dPart1 in class com.mypackage.MyClass at org.hibernate.property.BasicPropertyAccessor.createGetter(BasicPropertyAccessor.java:282) at org.hibernate.property.BasicPropertyAccessor.getGetter(BasicPropertyAccessor.java:275) at org.hibernate.mapping.Property.getGetter(Property.java:272) at org.hibernate.tuple.entity.PojoEntityTuplizer.buildPropertyGetter(PojoEntityTuplizer.java:247) at org.hibernate.tuple.entity.AbstractEntityTuplizer.<init>(AbstractEntityTuplizer.java:125) at org.hibernate.tuple.entity.PojoEntityTuplizer.<init>(PojoEntityTuplizer.java:55) at org.hibernate.tuple.entity.EntityEntityModeToTuplizerMapping.<init>(EntityEntityModeToTuplizerMapping.java:56) at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:302) at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:434) at It appears that hibernate doesn't like my capitalization. How should I fix this?

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• Regex - find all phrases except the one including specific word

  - by ekapek

  Hi, I have a text file with text like: "Lorem ipsum text. Second lorem ipsum. How are You. It's ok. Done. Something else now. New line. Halo. Text. Are You ok." I need a regex to find all sentences (between .) except ones with the word "else" within it. I'm trying many regex patterns but nothing works. Can I do this with regex?

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• Can't find applicationSupportDirectory?

  - by Frost Li

  There is always a pre-written function at AppDelegate: (NSString *)applicationSupportDirectory { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES); NSString *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : NSTemporaryDirectory(); return [basePath stringByAppendingPathComponent:@"SyncFile"]; } However, I can't call this method outside this class: id _appDelegate = (SyncFile_AppDelegate *)[[NSApplication sharedApplication] delegate]; NSLog(@"%@", [_appDelegate applicationSupportDirectory]); The compiler warned me that it can't find method applicationSupportDirectory... Does anyone know what's wrong with my code? Thank you very much!

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• glui /usr/bin/ld: cannot find -lXmu

  - by Myx

  Hello: I have downloaded the latest GLUI source code and now I am trying to compile it. When I do so, I get the following error: g++ -O0 -Wall -pedantic -I./ -I./include -I/usr/X11R6/include -o bin/example1 example/example1.cpp -L./lib -lglui -L/usr/X11R6/lib/libXdmcp.a -lglut -lGLU -lGL -lXmu -lXext -lX11 -lXi -lm /usr/bin/ld: cannot find -lXmu collect2: ld returned 1 exit status When I did a locate libXmu, I get the following output: > %:~/src/GLUI/src$ locate libXmu > /usr/lib/libXmu.so.6 > /usr/lib/libXmu.so.6.2.0 > /usr/lib/libXmuu.so.1 > /usr/lib/libXmuu.so.1.0.0 Do I get the error because I don't have a /usr/lib/libXmu.so? If this is the case, how can I make one? (I am not experienced with linking at all). Thanks!

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• How to find missing web part ?

  - by Leonidius

  Does anybody know how to find offending web part which causes this error ? “A Web Part or Web Form Control on this Web Part Page cannot be displayed or imported because it is not registered on this site as safe.” I have inherited an old SharePoint 2003 portal site which uses custom web parts. I know what this error means. I also know that each web part must be installed and registred as safe in web.config. The problem is that I don't know which one is missing. I get same error when I'm trying to open the page in FrontPage as well.

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• Cannot stop Oracle Queue - Could not find program unit being called: "SYS.DBMS_ASSERT"

  - by Vladimir Bezugliy

  Cannot stop and drop oracle Queue. Following code BEGIN DBMS_AQADM.STOP_QUEUE ( queue_name => 'TEST_QUEUE'); DBMS_AQADM.DROP_QUEUE( queue_name => 'TEST_QUEUE'); END; / produces following errors: ERROR at line 1: ORA-04068: existing state of packages has been discarded ORA-04065: not executed, altered or dropped stored procedure "SYS.DBMS_ASSERT" ORA-06508: PL/SQL: could not find program unit being called: "SYS.DBMS_ASSERT" ORA-06512: at "SYS.DBMS_AQADM_SYS", line 3365 ORA-06512: at "SYS.DBMS_AQADM", line 167 ORA-06512: at line 5 What can be the root cause of this problem?

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• How to find which type of system call is used by a program

  - by bala1486

  I am working on x86_64 machine. My linux kernel is also 64 bit kernel. As there are different ways to implement a system call (int 80, syscall, sysenter), i wanted to know what type of system call my machine is using. I am newbie to linux. I have written a demo program. include int main() { getpid(); return 0; } getpid() does one system call. Can anybody give me a method to find which type of system call will be used by my machine for this program.. Thank you....

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• Computation geometry: find where's the triangle after rotation, tranlastion or reflection in a mirro

  - by newba

  Hi, I have a small contest problem in which is given a set of points, in 2D, that form a triangle. This triangle may be subject to an arbitrary rotation, may be subject to an arbitrary translation (both in the 2D plane) and may be subject to a reflection on a mirror, but its dimensions were kept unchanged. Then, they give me a set of points in the plane, and I have to find 3 points that form my triangle after one or more of those geometric operations. Example: 5 15 8 5 20 10 6 5 17 5 20 20 5 10 5 15 20 15 10 I bet that have to apply some known algorithm, but I don't know which. The most common are: convex hull, sweep plane, triangulation, etc. Can someone give a tip? I don't need the code, only a push, please!

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• Good way to find duplicate files?

  - by OverTheRainbow

  Hello I don't know enough about VB.Net (2008, Express Edition) yet, so I wanted to ask if there were a better way to find files with different names but the same contents, ie. duplicates. In the following code, I use GetFiles() to retrieve all the files in a given directory, and for each file, use MD5 to hash its contents, check if this value already lives in a dictionary: If yes, it's a duplicate and I'll delete it; If not, I add this filename/hashvalue into the dictionary for later: 'Get all files from directory Dim currfile As String For Each currfile In Directory.GetFiles("C:\MyFiles\", "File.*") 'Check if hashing already found as value, ie. duplicate If StoreItem.ContainsValue(ReadFileMD5(currfile)) Then 'Delete duplicate 'This hashing not yet found in dictionary -> add it Else StoreItem.Add(currfile, ReadFileMD5(currfile)) End If Next Is this a good way to solve the issue of finding duplicates, or is there a better way I should know about? Thank you.

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• How can I find out where is my code causing GLib-GObject-CRITICAL

  - by michael

  Hi, When I c/c++ application fails with the following CRITICAL, can you please tell me how can I find out where is the code causing the error? I have tried to run it in Debugger, trying to do a 'bt when the program fails. But it does not show where is the code causing the CRITICAL: (process:3155): GLib-GObject-CRITICAL **: /build/buildd/glib2.0-2.22.3/gobject/gtype.c:2458: initialization assertion failed, use IA__g_type_init() prior to this function (process:3155): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed (process:3155): GLib-GObject-CRITICAL **: /build/buildd/glib2.0-2.22.3/gobject/gtype.c:2458: initialization assertion failed, use IA__g_type_init() prior to this function (process:3155): GLib-GObject-CRITICAL **: /build/buildd/glib2.0-2.22.3/gobject/gtype.c:2458: initialization assertion failed, use IA__g_type_init() prior to this function (process:3155): GLib-GObject-CRITICAL **: /build/buildd/glib2.0-2.22.3/gobject/gtype.c:2458: initialization assertion failed, use IA__g_type_init() prior to this function (process:3155): GLib-GObject-CRITICAL **: g_type_add_interface_static: assertion `G_TYPE_IS_INSTANTIATABLE (instance_type)' failed (process:3155): GLib-GObject-CRITICAL **: /build/buildd/glib2.0-2.22.3/gobject/gtype.c:2458: initialization assertion failed, use IA__g_type_init() prior to this function Thank you.

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• Netbeans can't find running Tomcat

  - by Yurish

  Hi! I'm running Tomcat inside of Netbeans. I added Tomcat server(not bundled with Netbeans) to Servers in Netbeans. But, when i'm trying to run Tomcat, it starts(i can visit Tomcat home page), but Netbeans can't find it running. Where is the problem? No stacktrace in Tomcat. When i'm deploying my project`s war in this Tomcat manually, everything works, but i need to deploy it automatically from Netbeans. Configuration: Netbeans 6.8 + Tomcat 6.0.26 + JSF and Hibernate project.

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• Find elements based on xsd type with lxml

  - by joet3ch

  I am trying to get a list of elements with a specific xsd type with lxml 2.x and I can't figure out how to traverse the xsd for specific types. Example of schema: <xsd:element name="ServerOwner" type="srvrs:string90" minOccurs="0"> <xsd:element name="HostName" type="srvrs:string35" minOccurs="0"> Example xml data: <srvrs:ServerOwner>John Doe</srvrs:ServerOwner> <srvrs:HostName>box01.example.com</srvrs:HostName> The ideal function would look like: elements = getElems(xml_doc, 'string90') def getElems(xml_doc, xsd_type): ** xpath or something to find the elements and build a dict return elements

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• JUnit: 4.8.1 "Could not find class"

  - by Patrick

  Ok, I am like other and new to jUnit and having a difficult time trying to get it working. I have searched the forum but the answers provided; I am just not getting. If anyone out there could lend me a hand I would greatly appreciate it. Let me provide the basics: OS: mac OS X.6 export JUNIT_HOME="/Developer/junit/junit4.8.1" export CVSROOT="/opt/cvsroot" export PATH="/usr/local/bin:/usr/local/sbin:/usr/localmysql/bin:/opt/PalmSDK/Current/bin/:/usr/local/mysql/bin:$PATH:$JUNIT_HOME:$CVSROOT" export CLASSPATH="$CLASSPATH:$JUNIT_HOME/junit-4.8.1.jar:$JUNIT_HOME" I can compile a test class from a java file, however when I try to then run the test java org.junit.runner.JUnitCore MyTest.class I get the following: JUnit version 4.8.1 Could not find class: MyTest.class Time: 0.001 OK (0 tests) Now I have been in the directory with the MyTest.class which is just somewhere in my file system, I tried moving the source folder to the "junit" folder and the "junit/junit4.8.1" folder and the same result. I cannot even run the tests that came with junit. Thanks patrick

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• Is it ok to replace optimized code with readable code?

  - by Coder

  Sometimes you run into a situation where you have to extend/improve an existing code. You see that the old code is very lean, but it's also difficult to extend, and takes time to read. Is it a good idea to replace it with modern code? Some time ago I liked the lean approach, but now, it seems to me that it's better to sacrifice a lot of optimizations in favor of higher abstractions, better interfaces and more readable, extendable code. The compilers seem to be getting better as well, so things like struct abc = {} are silently turned into memsets, shared_ptrs are pretty much producing the same code as raw pointer twiddling, templates are working super good because they produce super lean code, and so on. But still, sometimes you see stack based arrays and old C functions with some obscure logic, and usually they are not on the critical path. Is it good idea to change such code if you have to touch a small piece of it either way?

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• Assistance using respond_to to find the right actions to render PDF in ruby on rails

  - by Angela

  Hi, I am trying out Prince with the Princely plugin, which is supposed to format templates that have the .pdf into a PDF generator. Here is my controller: class TodoController < ApplicationController def show_date @date = Date.today @campaigns = Campaign.all @contacts = Contact.all @contacts.each do |contact| end respond_to do |format| format.html format.pdf do render :pdf => "filename", :stylesheets => ["application", "prince"], :layout => "pdf" end end end end I changed the routes.db to include the following: map.connect ':controller/:action.:format' map.todo "todo/today", :controller => "todo", :action => "show_date" My expected behavior is when I enter todo/today.pdf, it tries to execute show_date, but renders according to the princely plugin. Right now, it says cannot find action. What do I need to do to fix this?

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• Program to find canonical cover or minimum number of functional dependencies

  - by Sev

  I would like to know if there is a program or algorithm to find canonical cover or minimum number of functional dependencies? For example: If you have: R = (A,B,C) <-- these are tables: A,B,C And dependencies: A ? BC B ? C A ? B AB ? C The canonical cover (or minimum number of dependencies) is: A ? B B ? C Is there a program that can accomplish this? If not, any code/pseudocode to help me write one would be appreciated. Prefer in Python or Java.

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