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• Why is activeX failing to create an object from a Labview executable?

  - by user360734

  Here is my scenario. I am using Quicktest Pro (VB) to create an ActiveX object from a Labview VI that I built into an executable. In the build specs of the VI I have enabled ActiveX server option (ActiveX server name: "MyLabviewProgram") and in the VI ToolsOptionsVI Server: Configuration the ActiveX box is checked. So in QTP my code is: Set IvApp = CreateObject("MyLabviewProgram.Application") Set Vi = IvApp.getVIReference("MyLabviewVI.vi") Vi.Call ParamNames, ParamVals Upon running this I get a Run Error on the first line: ActiveX component can't create object: 'MyLabviewProgram.Application' I am having trouble figuring out why it errors. From National Instruments website they have a step in on one of their community pages about "LabVIEW Executable Used as ActiveX Server". The step is after building the EXE, 5. Run the EXE at least once on the target to activate the .TLB file. I've run the executable but not sure what they mean by on the target. Does anyone have a suggestion on what I need to do to get this working?

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• How to parse a binary file using Javascript and Ajax

  - by Alex Jeffery

  I am trying to use JQuery to pull a binary file from a webserver, parse it in Javascript and display the contents. I can get the file ok and parse some of the file correctly. How ever I am running into trouble with one byte not coming out as expected. I am parsing the file a byte at a time, it is correct until I get to the hex value B6 where I am getting FD instead of B6. Function to read a byte data.charCodeAt(0) & 0xff; File As Hex: 02 00 00 00 55 4C 04 00 B6 00 00 00 The format I want to parse the file out into. short: 0002 short: 0000 string: UL short: 0004 long: 0000B6 Any hints as to why the last value is incorrect?

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• how to prune data set?

  - by sakura90

  The MovieLens data set provides a table with columns: userid | movieid | tag | timestamp I have trouble reproducing the way they pruned the MovieLens data set used in: http://www.cse.ust.hk/~yzhen/papers/tagicofi-recsys09-zhen.pdf In 4.1 Data Set of the above paper, it writes "For the tagging information, we only keep those tags which are added on at least 3 distinct movies. As for the users, we only keep those users who used at least 3 distinct tags in their tagging history. For movies, we only keep those movies that are annotated by at least 3 distinct tags." I tried to query the database: select TMP.userid, count(*) as tagnum from (select distinct T.userid as userid, T.tag as tag from tags T) AS TMP group by TMP.userid having tagnum = 3; I got a list of 1760 users who labeled 3 distinct tags. However, some of the tags are not added on at least 3 distinct movies. Any help is appreciated.

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• Assembly not referenced error with Interactive Brokes ActiveX API

  - by Lirik

  I'm attempting to use the Interactive Brokers ActiveX API, but I'm having a little trouble: error CS0012: The type 'System.Windows.Forms.AxHost' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'. My code: namespace DataFeed.Gateway { class IBGateway : IGateway { private AxTWSLib.AxTws tws; //<-- the error line //... } } I have a console application, so I'm wondering if that might be the reason why ActiveX is not working... or is there something else going on here? Maybe I should add the AxTWSlib.dll to the GAC, but do I really have to? If I add the dll as a resource, then I thought that I don't need to add it to the GAC. Note: I've dropped the AxTWSlib.dll in my project folder and I've added it to the project references... no problems there.

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• In WebKitGtk+, how can I access parameters in an event listener?

  - by Matthew

  Here is an example in javascript of what I want to do: function handleDragStart(e) { e.dataTransfer.effectAllowed = 'move'; e.dataTransfer.setData('text/plain', 'some data'); } var dragSource = document.querySelector('#dragSource'); dragSource.addEventListener('dragstart', handleDragStart, false, null); But I am having trouble translating this to a GLib-based system. Here is an example in Vala: void on_dragstart(EventTarget event_target) { // How can I access the equivalent of e.dataTransfer? } WebKit.WebView web_view = ... WebKit.DOM.Document document = web_view.get_dom_document(); WebKit.DOM.Element drag_source = document.query_selector('#dragSource'); drag_source.add_event_listener("dragstart", (Callback) on_dragstart, false, null); While I am using Vala, an answer in any language interacting with WebKitGtk+ directly would be helpful.

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• is it legal to use fontsquirrel.com to create a @font-face kit for a font I have been given?

  - by ongoingworlds

  fontsquirrel.com allows you to upload a font and create a @font-face kit which you can apply to your website and use to display fonts which will display cross-browser (even in IE6!). But what I want to know is, is this legal? I've been supplied the font "Lubalin Graph Std" and told to use this for headers on the website I'm creating. I can upload the font file to fontsquirrel.com and use this to display headers in this font across the website - but I'm worried we'll get into trouble for doing this. What should I do?

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• Android on Eclipse - Adding jar files to an Eclipse Android Project

  - by Shalini

  I am developing an Android App that uses the Google APIs Client Library for Java version 1.12.0. I have added the jar files to the /libs folder (and not to a new /lib folder). I get the following error: Dx trouble processing "javax/xml/namespace/QName.class": Ill-advised or mistaken usage of a core class (java.* or javax.*) when not building a core library. I am NOT using Maven though, and all the answers by others seem to make use of Maven. Android version - 4.1.2 API level 16 Eclipse - Java EE Juno Any suggestions on how I can solve this?

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• PHP Moving mySQL Tree Node

  - by TK

  I am having trouble trying to move sub nodes or parent nodes up or down... not that good at math. CREATE TABLE IF NOT EXISTS `pages` ( page-id mediumint(8) unsigned NOT NULL AUTO_INCREMENT, page-left mediumint(8) unsigned NOT NULL, page-right smallint(8) unsigned NOT NULL, page-title text NOT NULL, page-content text NOT NULL, page-time int(11) unsigned NOT NULL, page-slug text NOT NULL, page-template text NOT NULL, page-parent mediumint(8) unsigned NOT NULL, page-type text NOT NULL, PRIMARY KEY (page-id) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 ; INSERT INTO pages (page-id, page-left, page-right, page-title, page-content, page-time, page-slug, page-template, page-parent, page-type) VALUES (17, 1, 6, '1', '', 0, 'PARENT', '', 0, ''), (18, 2, 5, '2', '', 0, 'SUB', '', 17, ''), (19, 3, 4, '3', '', 0, 'SUB-SUB', '', 18, ''), (20, 7, 8, '5', '', 0, 'TEST', '', 0, ''); As example how would I move TEST up above PARENT and say move SUB down below SUB-SUB by playing with the page-left/page-right IDs? Code is not required just help with the SQL concept or math for it, would help me understand how to move it better...

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• Can Hibernate default a Null String to Empty String

  - by sliver

  In our application we are pulling data from a DB2 mainframe database. If the database has "low values" in a field, hibernate sends a "null" value in the object. This occurs even if the column is defined as "not null". As we are doing XML parsing on this, Castor is having trouble with it. I would like to fix this in Hibernate. Also, all of the hibernate hbm files are generated, so we can't mess with them (they are regened from time to time.) Any way to intercept all Strings and replace nulls with ""?

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• Shared Variable Among Ruby Processes

  - by Jesse J

  I have a Ruby program that loads up two very large yaml files, so I can get some speed-up by taking advantage of the multiple cores by forking off some processes. I've tried looking, but I'm having trouble figuring how, or even if, I can share variables in different processes. The following code is what I currently have: @proteins = "" @decoyProteins = "" fork do @proteins = YAML.load_file(database) exit end fork do @decoyProteins = YAML.load_file(database) exit end p @proteins["LVDK"] P displays nil though because of the fork. So is it possible to have the forked processes share the variables? And if so, how?

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• IIS 7 - floats returning with commas instead of periods

  - by cc0

  I'm having trouble reading rows with float values, because these rows return for example 12,34 instead of 12.34 as it should. I suspect this is because both my IIS and SQL server is on a Norwegian Windows Server 2008. So I went to the regional settings and customized the default decimal symbol, then restarted my servers. The output in the database now shows the period decimal symbol, but when I request it through the IIS server it comes comma separated (the IIS server is on another computer, but that also has the default decimal symbol set to period). The IIS server is IIS7 and the SQL Server is 2008 Does anyone have any idea how to fix this? Any help would be greatly appreciated.

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• Building elf within Eclipse within Windows

  - by BSchlinker

  Hey guys, I'm having trouble building an Elf file within Eclipse within Windows. It seems that everytime I build, a PE / portable executable for windows is created. I've gone into the Binary Parser section and checked Elf Parser while making sure that everything else is unchecked. However, I continue to end up with a PE which I cannot run on Linux. For clarification, I'm using the Linux GCC toolchain within Eclipse. I've attempted a reinstall of Cygwin -- still experiencing the same issues. Any ideas? Thanks

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• Run a method from an exe file

  - by Lily

  Hi I need to call a method from an exe file ProcessStartInfo startInfo = new ProcessStartInfo(@"exeParser.exe"); startInfo.WindowStyle = ProcessWindowStyle.Normal; startInfo.CreateNoWindow = false; startInfo.RedirectStandardOutput = true; startInfo.UseShellExecute = false; startInfo.Arguments = ?? I don't know how to call a method and pass parameters Any help please?? The executable is mine but I'm having trouble using the things in a web app so I thought it would be better to call it as a process Thanks

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• Synclock a section of code while waiting for ShowDialog to return

  - by clawson

  I'm having trouble working out how to lock my application out of a section of code while it waits for a response from an external program. I've used Synclock on a section of code with the Me object in the expression. In this Synclock I call an overridden ShowDialog method of a dialog box, which has a timeout parameter, but does return the value from the underlying ShowDialog function call ,once the timer is setup. Works like this. SyncLock Me Dim frmDlgWithTimeout As New frmDlgWithTimeout ' dialog box with overridden ShowDialog ' Dim res As DialogResult = frmDlgWithTimeout.ShowDialog(10 * 1000) ' 10 sec timeout ' End SyncLock Now, external programs may raise events that bring my application to this Synclock but it doesn't prevent it from entering it, even though the ShowDialog function hasn't returned a value (and hence what I thought would keep the section of code locked). There is only one instance of the object that is used for lock in the program. Your help is greatly appreciated.

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• jQuery Sparklines: $.getJSON data can't be read

  - by Bob Jansen

  I'm trying to generate a pie graph with Sparklines but I'm running into some trouble. I can't seem to figure out what I'm doing wrong, but I feel it is a silly mistake. I'm using the following code to generate a sparkline chart in the div #traffic_bos_ss: //Display Visitor Screen Size Stats $.getJSON('models/ucp/traffic/traffic_display_bos.php', { type: 'ss', server: server, api: api, ip: ip, }, function(data) { var values = data.views; //alert(values); $('#traffic_bos_ss').sparkline(values, { type: "pie", height: "100%", tooltipFormat: 'data.screen - {{value}}', }); }); The JSON string fetched: {"screen":"1220x1080, 1620x1080, 1920x1080","views":"[2, 2, 61]"} For some reason Sparklines does not process the variable values. When I alert the variable it outputs "[2, 2, 61]". Now the jQuery code does work when I replace the snippet: var values = data.views; with var values = [2, 2, 61]; What am I doing wrong?

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• Excel VBA to check autofilter for data

  - by cav719

  I need help checking for autofiltered rows not including the header. I want it to give a message box "No records found." then exit sub or continue with copy paste if there are rows beyond the header row. I know I need an If/Else entry after the filter to check for data but I'm having trouble figuring how to check. This code is being done from a UserForm I created. Here is my script: Private Sub Searchbycompanyfield_Click() If CompanyComboBox1.Value = "" Then MsgBox "Please enter a Company to begin search." Exit Sub End If ActiveSheet.Range("$A:$H").AutoFilter Field:=1, Criteria1:=EQDataEntry.CompanyComboBox1.Value, Operator:=xlOr Cells.Select Selection.Copy Sheets("Sheet2").Select Range("A5").Select ActiveSheet.Paste Call MessageBoxYesOrNoMsgBox End Sub Any help would be greatly appreciated.

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• Are there any widely-agreed upon guidelines for rating your language knowledge on a scale?

  - by DVK

  The question was imagined after a co-worker was complaining for an hour about some guy who could not answer basic Java questions on an interview after self-identifying himself as "8 out of 10" on Java. While that was an obvious fib, I personally always had major trouble defining my specific language skills on a sliding scale unless I'm given specific guidelines (remember 40 standard libraries by heart? Able to solve 10 random Project Euler problems in <30 mins each? Can write implementation of A, B and C data-structures from scratch in 30 mins? Know 30% of standard? Can answer 50% of questions on StackOverflow pertaining to the language?) So, I was wondering - is there some sort of commonly accepted methodology for translating such tangible benchmarks into "rate yourself on a language between 1-10"? "Kernighan gets an A, God gets a B, everyone else gets C and less" type jokes are not helpful :)

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• What can I do about a SQL Server ghost FK constraint?

  - by rcook8601

  I'm having some trouble with a SQL Server 2005 database that seems like it's keeping a ghost constraint around. I've got a script that drops the constraint in question, does some work, and then re-adds the same constraint. Normally, it works fine. Now, however, it can't re-add the constraint because the database says that it already exists, even though the drop worked fine! Here are the queries I'm working with: alter table individual drop constraint INDIVIDUAL_EMP_FK ALTER TABLE INDIVIDUAL ADD CONSTRAINT INDIVIDUAL_EMP_FK FOREIGN KEY (EMPLOYEE_ID) REFERENCES EMPLOYEE After the constraint is dropped, I've made sure that the object really is gone by using the following queries: select object_id('INDIVIDUAL_EMP_FK') select * from sys.foreign_keys where name like 'individual%' Both return no results (or null), but when I try to add the query again, I get: The ALTER TABLE statement conflicted with the FOREIGN KEY constraint "INDIVIDUAL_EMP_FK". Trying to drop it gets me a message that it doesn't exist. Any ideas?

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• how to translate Haskell into Scalaz?

  - by TOB

  One of my high school students and I are going to try to do a port of Haskell's Parsec parser combinator library into Scala. (It has the advantage over Scala's built-in parsing library that you can pass state around fairly easily because all the parsers are monads.) The first hitch I've come across is trying to figure out how Functor works in scalaz. Can someone explain how to convert this Haskell code: data Reply s u a = Ok a !(State s u) ParseError | Error ParseError instance Functor (Reply s u) where fmap f (Ok x s e) = Ok (f x) s e fmap _ (Error e) = Error e -- XXX into Scala (using Scalaz, I assume). I got as far as sealed abstract class Reply[S, U, A] case class Ok[S, U, A](a: A, state: State[S, U], error: ParseError) extends Reply[S, U, A] case class Error[S, U, A](error: ParseError) extends Reply[S, U, A] and know that I should make Reply extend the scalaz.Functor trait, but I can't figure out how to do that. (Mostly I'm having trouble figuring out what the F[_] parameter does.) Any help appreciated! Thanks, Todd

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• Linq to SQL EntitySet Records causing duplicate insertion

  - by Savvas Sopiadis

  In a WPF application i'm using Linq to SQL in a multi tier application. (This is an archailogy photo filing application), so every excavation has its corresponding Pictures, thus a one-to-many relationship. This relationship is correctly created by SQLMetal (which i'm using to create the POCOs). So here is the situation i 'm having trouble with: Saving changes (either of new or altered objects) is done through UnitOfWork() pattern this way: using (IUnitOfWork unitOfWork = UnitOfWork.Begin()) { //if this is a new record if (SelectedExcavation.excavation.ExcavationId == 0) { IsNewRecord = true; excavService.Add(SelectedExcavation.excavation); } //send the actual changes to the dbms unitOfWork.Commit(); } Everything works fine! BUTTTT!!! Whenever a record gets updated which has (already at least one ) corresponding Picture Record: 1) a new Excavation Record is inserted 2) the current Excavation Record gets updated 3) the previous Picture Record gets its Id changed to the newly created ExcavationId What is going on under the hood? Does Linq to SQL not handle such simple update scenarios? Thanks in advance

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• 3D Screensaver interfering with WPF application (Windows XP)

  - by Andrew Keith

  I have a fairly large application that uses WPF for its user interface. I recently found an unusual defect regarding 3D screensavers. The 3D screensavers 3D FlowerBox,3D Flying Objects,3D Pipes,3D Text causes 1 of my WPF windows to disappear when the screensaver activates. Other screensavers are fine. My application only encounters this problem on Windows XP. I have some experience with DirectX. When a 3D screensavers activates, the d3d device context will be switched to exclusive mode. I reckon that WPF has trouble restoring the device context when the device switches back to cooperative mode (hence why its only affecting windows XP) Has anyone seen such a scenario occur before ? Is there a remedy for the problem ? Windows XP SP3, DirectX 9.0c, .NET 3.5

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• Accessing the DI container from anywhere

  - by ChrisR

  I've implemented the Symfony2 Dependency Injection container in my Zend Framework project and it works fine in the MVC layer of my application. I've initialized the DIC in my bootstrap and can access it anywhere by calling: Zend_Controller_Front::getInstance()->getParam('bootstrap')->getDic() The problem is that there are some parts of my application that do not utilize the Zend Framework application/MVC layer. My CLI tools for example. I could perfectly initialize a new DIC there but that would just be some copy paste work from the Bootstrap file which is asking for trouble down the road (DRY principles, etc) Is it a better solution to make my DIC available in the Zend_Registry or as a singleton called by a static method DIC::getInstance() for example? I know Registry and singletons are considered bad things but the DIC is such a high level part of the application that I will probably never run into the problems that make it a bad thing. Is this a good solution or are there better ways of accomplishing a globally accessible DIC?

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• left-hand operand of comma has no effect?

  - by sil3nt

  Hello there, I'm having some trouble with this warning message, it is implemented within a template container class int k = 0, l = 0; for ( k =(index+1), l=0; k < sizeC, l < (sizeC-index); k++,l++){ elements[k] = arryCpy[l]; } delete[] arryCpy; this is the warning i get cont.h: In member function `void Container<T>::insert(T, int)': cont.h:99: warning: left-hand operand of comma has no effect cont.h: In member function `void Container<T>::insert(T, int) [with T = double]': a5testing.cpp:21: instantiated from here cont.h:99: warning: left-hand operand of comma has no effect cont.h: In member function `void Container<T>::insert(T, int) [with T = std::string]': a5testing.cpp:28: instantiated from here cont.h:99: warning: left-hand operand of comma has no effect >Exit code: 0

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• Floating point equality and tolerances

  - by doron

  Comparing two floating point number by something like a_float == b_float is looking for trouble since a_float / 3.0 * 3.0 might not be equal to a_float due to round off error. What one normally does is something like fabs(a_float - b_float) < tol. How does one calculate tol? Ideally tolerance should be just larger than the value of one or two of the least significant figures. So if the single precision floating point number is use tol = 10E-6 should be about right. However this does not work well for the general case where a_float might be very small or might be very large. How does one calculate tol correctly for all general cases? I am interested in C or C++ cases specifically.

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• Programming with midi, and tuning notes to specific frequencies

  - by froggie0106

  I am working on a project in which I need to be able to generate midi notes of varying frequencies with as much accuracy as possible. I originally tried to write my program in Java, but it turns out that the sound.midi package does not support changing the tunings of notes unless the frequencies are Equal Tempered frequencies (or at least it didn't in 1.4, and I haven't been able to find evidence that this has been fixed in recent versions). I have been trying to find a more appropriate language/library to accomplish this task, but since this is my first time programming with MIDI and my need for specific tuning functionality is essential, I have been having considerable trouble finding exactly what I need. I am looking for advice from people who have experience writing MIDI programs as to what languages are useful, especially for tuning notes to specific frequencies. Any links to websites with API docs and example code would also be extremely helpful.

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