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Search found 369 results on 15 pages for 'jonas anderson'.

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• Erlang "must-have" development tools

  - by Jonas

  I am not a professional Erlang developer (not yet), but I would like to hear what Erlang development tools are "must-have" in the industry (besides emacs and git/mercurial) ? I do know about a few tools like: rebar, dialyzer, hipe, eunit and edoc but I have no idea if they are used by professional erlang developers or if there are other tools that are "must-have". This question is inspired by Java "must-have" development tools

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• How an I use Latin-1 letters in JRXML and JasperReports?

  - by Jonas

  I would like to use Latin-1 letters in JasperReports. In my JRXML-file I have: <staticText> <reportElement x="0" y="0" width="555" height="25"/> <text><![CDATA[Åäö]]></text> </staticText> If I'm not using any Latin-1 letters it works, but when I'm using them I get a JRException when I do: JasperCompileManager.compileReportToFile("reports/ReportFile.jrxml"); How can I support Latin-1 in JRXML and JasperReports?

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• Eclipse Plugin that Opens a Command Line in Eclipse

  - by Jonas Laufu

  I'm looking for an Eclipse plug-in that shows a system (independent) command line in a view that is ideally synchronized with the current project's local path. So basically a shell within Eclipse. The reason for this is to be able to execute custom build commands and script faster than specifying them as launch configurations or having to open a command prompt every time I start eclipse.

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• What are the Database code smells?

  - by Jonas Byström

  We all know 'code smells', but what are the fundamental 'database smells'?

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• STLport crash (race condition, Darwin only?)

  - by Jonas Byström

  When I run STLport on Darwin I get a strange crash. (Haven't seen it anywhere else than on Mac, but exactly same thing crash on both i686 and PowerPC.) This is what it looks like in gdb: Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: 13 at address: 0x0000000000000000 [Switching to process 21097] 0x000000010120f47c in stlp_std::__node_alloc_impl::_M_allocate () It may be some setting in STLport, I noticed that Mac.h and MacOSX.h seemed far behind on features. I also know that it it must be some type of race condition, since it doesn't occur just by calling this method (implicity called). The crash happens mainly when I push the system, running 10 simultaneous threads that do a lot of string handling. Other theories I come up with have to do with compiler flags (configure script) and g++ 4.2 bugs (seems like 4.4.3 isn't on Mac yet with Objective-C support, which I need to link with). HELP!!! :) Edit: I run unit tests, which do all sorts of things. This problem arise when I start 10 threads that push the system; and it always comes down to std::string::append which eventually boils down to _M_allocate. Since I can't even get a descent dump of the code that's causing the problem, I figure I'm doing something bad. Could it be so since it's trying to execute at instruction pointer 0x000...000? Are dynlibs built as DLLs in Windows with a jump table? Could it perhaps be that such a jump table has been overwritten for some reason? That would probably explain this behavior. (The code is huge, if I run out of other ideas, I'll post a minimum crashing sample here.)

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• How do I set TargetNullValue to a date?

  - by Bryan Anderson

  I'm using the WPF toolkit's Calendar control to allow users to select a date. If the date is not yet selected then the property the SelectedDate is bound to is Null. This makes the Calendar default you January 1, 0 AD. I'd like to do something like SelectedDate="{Binding UserPickedDate, TargetNullValue=Today, Mode=TwoWay}" But both "Today" and "Now" throw binding errors. Can I use TargetNullValue to set the default date to Today or Now?

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• Linq query - multiple where, with extension method

  - by Cj Anderson

  My code works for ORs as I've listed it below but I want to use AND instead of OR and it fails. I'm not quite sure what I'm doing wrong. Basically I have a Linq query that searches on multiple fields in an XML file. The search fields might not all have information. Each element runs the extension method, and tests the equality. Any advice would be appreciated. refinedresult = From x In theresult _ Where x.<thelastname>.Value.TestPhoneElement(LastName) Or _ x.<thefirstname>.Value.TestPhoneElement(FirstName) Or _ x.<id>.Value.TestPhoneElement(Id) Or _ x.<number>.Value.TestPhoneElement(Telephone) Or _ x.<location>.Value.TestPhoneElement(Location) Or _ x.<building>.Value.TestPhoneElement(building) Or _ x.<department>.Value.TestPhoneElement(Department) _ Select x Public Function TestPhoneElement(ByVal parent As String, ByVal value2compare As String) As Boolean 'find out if a value is null, if not then compare the passed value to see if it starts with Dim ret As Boolean = False If String.IsNullOrEmpty(parent) Then Return False End If If String.IsNullOrEmpty(value2compare) Then Return ret Else ret = parent.ToLower.StartsWith(value2compare.ToLower.Trim) End If Return ret End Function

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• How can I set up a fault-tolerant web-service built with Erlang/OTP?

  - by Jonas

  I would like to setup a fault-tolerant web-service. I will build the web-service with Erlang/OTP. At the beginning the web-service will be hosted on a few VPS. Each VPS has its own IP-address, and I can use more if IPs if I need. I would like to have the domain name pointing to a single IP-address. How can setup my Erlang/OTP-application to be fault-tolerant behind a single IP-address? Do I need to use VLAN? Is there a way my Erlang/OTP-application can use heartbeats and handle virtual IP-addresses to route the traffic? or how should I solve this problem?

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• va_list crash bug from hell

  - by Jonas Byström

  I'm getting crashes due to memory overwrites (possibly within STLport) running on Darwin. Totally out of ideas, what to do? (Added this question so no-one else would run into the same trap without finding a viable answer.)

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• Exporting Reports from SSRS Report Manager

  - by Jonas Gorauskas

  I have several SSRS reports which have a textbox at the bottom with a link to a privacy notice page. Some of my users will export these reports to an Excel workbook or a Word document. When the users export the reports, the reporting engine does not include the link in the office documents. When exported as as PDF or HTML, the link to the notice is also exported as expected. Is there a way for me to configure or force the office documents to include the link to the notice and ensure that it is also exported?

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• Passing viewmodel to actionresult creates new viewmodel

  - by Jonas Bohez

  I am using a viewmodel, which i then when to send to an actionresult to use (the modified viewmodel) But in the controller, i lose the list and objects in my viewmodel. This is my view: @using PigeonFancier.Models @model PigeonFancier.Models.InschrijvingModel @using (Html.BeginForm("UpdateInschrijvingen","Melker",Model)) { <div> <fieldset> <table> @foreach (var item in Model.inschrijvingLijst) { <tr> <td>@Html.DisplayFor(model => item.Duif.Naam)</td> <td> @Html.CheckBoxFor(model => item.isGeselecteerd)</td> </tr> } </table> <input type="submit" value="Wijzigen"/> </fieldset> </div> } This is my controller, which does nothing at the moment until i can get the full viewmodel back from the view. public ActionResult UpdateInschrijvingen(InschrijvingModel inschrijvingsModel) { // inschrijvingsModel is not null, but it creates a new model before it comes here with //Use the model for some updates return RedirectToAction("Inschrijven", new { vluchtId = inschrijvingsModel.vlucht.VluchtId }); } This is the model with the List and some other objects who become null because it creates a new model when it comes back from the view to the actionresult public class InschrijvingModel { public Vlucht vlucht; public Duivenmelker duivenmelker; public List<CheckBoxModel> inschrijvingLijst { get; set; } public InschrijvingModel() { // Without this i get, No parameterless constructor defined exception. // So it uses this when it comes back from the view to make a new model } public InschrijvingModel(Duivenmelker m, Vlucht vl) { inschrijvingLijst = new List<CheckBoxModel>(); vlucht = vl; duivenmelker = m; foreach (var i in m.Duiven) { inschrijvingLijst.Add(new CheckBoxModel(){Duif = i, isGeselecteerd = i.IsIngeschrevenOpVlucht(vl)}); } } What is going wrong and how should i fix this problem please? Thanks

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• Laws of Computer Science and Programming

  - by Jonas

  We have Amdahl's law that basically states that if your program is 10% sequential you can get a maximum 10x performance boost by parallelizing your application. Another one is Wadler's law which states that In any language design, the total time spent discussing a feature in this list is proportional to two raised to the power of its position. 0. Semantics 1. Syntax 2. Lexical syntax 3. Lexical syntax of comments My question is this: What are the most important (or at least significant / funny but true / sad but true) laws of Computer Science and programming? I want named laws, and not random theorems, So an answer should look something like Surname's (law|theorem|conjecture|corollary...) Please state the law in your answer, and not only a link. Edit: The name of the law does not need to contain it's inventors surname. But I do want to know who stated (and perhaps proved) the law

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• wxruby - Set max length of ComboBox

  - by Jonas Söderström

  Is is possible to set the Max length of a ComboBox in wxruby? I have looked in the documentation but find nothing http://wxruby.rubyforge.org/doc/combobox.html But if i do my_combobox.methods.sort I get set_max_size and set_min_size in the list. But When I call it my_combobox.set_max_length(100) I only get undefined method 'set_max_length' for #<Wx::ComboBox:0x4d4a914> I've also tried to call it as a private method def my_combobox.max(i) set_max_length(i) end my_combobox.max(100) But with the same result. The issue I want to avoid is that if somebody pastes 6000+ characters in my Combobox the text becomes white.

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• warnings emitted during 'easy_install'

  - by Matt Anderson

  When I easy_install some python modules, warnings such as: <some module>: module references __file__ <some module>: module references __path__ <some module>: module MAY be using inspect.trace <some module>: module MAY be using inspect.getsourcefile sometimes get emitted. Where (what package / source file) do these messages come from? Why is referencing __file__ or __path__ considered a bad thing?

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• In CAB is a service it's own module?

  - by David Anderson

  I'm learning Composite Application Block and I've hit a rock about services. I have my shell application in its own solution, and of course a test module in its own solution (developed and testing completely independent and external of the shell solution). If I created a service named "Sql Service", would I need to put this in it's own library, so that both the shell, and the module know the types? If that's the case, then for good practice, should I put the service project in the shell solution, or external just like a module (in it's own solution), even though it's not loaded as a module? Then, what about references? Should the shell reference this directly, add then add the service? Or load it as a module and add the service? I have a lot of confusion on where I should create my services, and if I should reference or load as modules..

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• How can I filter a JTable?

  - by Jonas

  I would like to filter a JTable, but I don't understand how I can do it. I have read How to Use Tables - Sorting and Filtering and I have tried with the code below, but with that filter, no rows at all is shown in my table. And I don't understand what column it is filtered on. private void myFilter() { RowFilter<MyModel, Object> rf = null; try { rf = RowFilter.regexFilter(filterFld.getText(), 0); } catch (java.util.regex.PatternSyntaxException e) { return; } sorter.setRowFilter(rf); } MyModel has three columns, the first two are strings and the last column is of type Integer. How can I apply the filter above, consider the text in filterFld.getText() and only filter the rows where the text is matched on the second column? I would like to show all rows that starts with the text specified by filterFld.getText(). I.e. if the text is APP then the JTable should contain the rows where the second column starts with APPLE, APPLICATION but not the rows where the second column is CAR, ORANGE. I have also tried with this filter: RowFilter<MyModel, Integer> itemFilter = new RowFilter<MyModel, Integer>(){ public boolean include(Entry<? extends MyModel, ? extends Integer> entry){ MyModel model = entry.getModel(); MyItem item = model.getRecord(entry.getIdentifier()); if (item.getSecondColumn().startsWith("APP")) { return true; } else { return false; } } }; How can I write a filter that is filtering the JTable on the second column, specified by my textfield?

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• Validating Application Settings Key Values in Isolated Storage for Windows Phone Applications

  - by Martin Anderson

  Hello everyone. I am very new at all this c# Windows Phone programming, so this is most probably a dumb question, but I need to know anywho... IsolatedStorageSettings appSettings = IsolatedStorageSettings.ApplicationSettings; if (!appSettings.Contains("isFirstRun")) { firstrunCheckBox.Opacity = 0.5; MessageBox.Show("isFirstRun not found - creating as true"); appSettings.Add("isFirstRun", "true"); appSettings.Save(); firstrunCheckBox.Opacity = 1; firstrunCheckBox.IsChecked = true; } else { if (appSettings["isFirstRun"] == "true") { firstrunCheckBox.Opacity = 1; firstrunCheckBox.IsChecked = true; } else if (appSettings["isFirstRun"] == "false") { firstrunCheckBox.Opacity = 1; firstrunCheckBox.IsChecked = false; } else { firstrunCheckBox.Opacity = 0.5; } } I am trying to firstly check if there is a specific key in my Application Settings Isolated Storage, and then wish to make a CheckBox appear checked or unchecked depending on if the value for that key is "true" or "false". Also I am defaulting the opacity of the checkbox to 0.5 opacity when no action is taken upon it. With the code I have, I get the warnings Possible unintended reference comparison; to get a value comparison, cast the left hand side to type 'string' Can someone tell me what I am doing wrong. I have explored storing data in an Isolated Storage txt file, and that worked, I am now trying Application Settings, and will finally try to download and store an xml file, as well as create and store user settings into an xml file. I want to try understand all the options open to me, and use which ever runs better and quicker

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• CSharp: Testing a Generic Class

  - by Jonas Gorauskas

  More than a question, per se, this is an attempt to compare notes with other people. I wrote a generic History class that emulates the functionality of a browser's history. I am trying to wrap my head around how far to go when writing unit tests for it. I am using NUnit. Please share your testing approaches below. The full code for the History class is here (http://pastebin.com/ZGKK2V84).

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• Ruby Oauth File upload/Multipart POST request

  - by Jonas Söderström

  Hi I've been looking at this for a couple of hours now and haven't found a solution. Is there a way to upload a file using OAuth-Ruby? When I send a normal request, everything works but adding a file as a parameter makes the signature invalid. Example: @access_token.post("http://.../imageresource", {:name=>"awesome cat"}) works great but gives me: <error> <message>images/POST: Request has neither file data nor a fileUrl from which to download data</message> </error> Any thoughts on this? Thanks,

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• Distinction between IO error and refusing to authenticate using HTTPService (ActionScript 3.0)

  - by Jonas

  I'm using HTTPService (tried with URLLoader but result is the same) to load XML file. Furthermore, XML file is secured with basic HTTP authentication. There are two kind of events I want to separate: IO Error User refuses to authenticate (pressing cancel on credential request dialog) The problem is that these two kind of events looks exactly the same (401 Status code is not presented). Is there any way to find out whether IO error occurred or authentication failed?

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• Windows Phone - OnNavigatingFrom - problem

  - by Martin Anderson

  I believe this is just a problem for me, due to my lack of programming ability. I am currently exploring transitions between page navigation with Windows Phone apps. I was originally using storyboards, and completed event handlers to have my pages animate on and off screen. These leads to the a problem when you want to navigate to many pages from one page, using the same transition. So I have started looking at OnNavigatedTo, and OnNavigatingFrom events and while it is working nicely for OnNavigatedTo, the later just wont work. It seems the Microsoft.Phone.Navigation assembly does not contain OnNavigatingFrom, and referencing System.Windows.Navigation, compiles ok, but I cant get pages to animate off upon navigation. I have a button on my Page2, which I want to go back to my MainPage (after I over-rided the back key with a message box for testing). I have transitions made on the page, and I have this as the event handler code... private void btnP2_BackToP1Clicked(object sender, System.Windows.RoutedEventArgs e) { NavigationService.Navigate(new Uri("/MainPage.xaml", UriKind.Relative)); } With this code for the OnNavigatedTo and OnNavigatingFrom events... protected override void OnNavigatedTo(PhoneNavigationEventArgs e) { PageTransition_In.Begin(); } // // protected override void OnNavigatingFrom(NavigatingCancelEventArgs e) { PageTransition_Out.Begin(); base.OnNavigatingFrom(e); } I have the feeling that OnNavigatingFrom may not(yet) be supported for Windows Phone Apps. OnNavigatedFrom is part of Microsoft.Phone.Navigation, but it only performs actions once the page is no longer active, which is too late to perform any animation effects.

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• metaclass multiple inheritance inconsistency

  - by Matt Anderson

  Why is this: class MyType(type): def __init__(cls, name, bases, attrs): print 'created', cls class MyMixin: __metaclass__ = MyType class MyList(list, MyMixin): pass okay, and works as expected: created <class '__main__.MyMixin'> created <class '__main__.MyList'> But this: class MyType(type): def __init__(cls, name, bases, attrs): print 'created', cls class MyMixin: __metaclass__ = MyType class MyObject(object, MyMixin): pass Is not okay, and blows up thusly?: created <class '__main__.MyMixin'> Traceback (most recent call last): File "/tmp/junk.py", line 11, in <module> class MyObject(object, MyMixin): pass TypeError: Error when calling the metaclass bases Cannot create a consistent method resolution order (MRO) for bases object, MyMixin

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• How to store an object in Riak with the Java client?

  - by Jonas

  I have setup Riak on a Ubuntu machine, and it seam to work if I do riak ping. Now I would like to use the Riak Java client to store an object, but it doesn't work. I get com.basho.riak.client.response.RiakIORuntimeException when I try to store an object. What am I doing wrong? Is there a way to test if I can access riak from my java client? Do I have to create a Bucket first? how? import com.basho.riak.client.RiakClient; import com.basho.riak.client.RiakObject; import com.basho.riak.client.response.FetchResponse; public class RiakTest { public static void main(String[] args) { // connect RiakClient riak = new RiakClient("http://192.168.1.107:8098/riak"); // create object RiakObject o = new RiakObject("mybucket", "mykey", "myvalue"); // store riak.store(o); } }

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• Technically why is processes in Erlang more efficient than OS threads?

  - by Jonas

  Spawning processes seam to be much more efficient in Erlang than starting new threads using the OS (i.e. by using Java or C). Erlang spawns thousands and millions of processes in a short period of time. I know that they are different since Erlang do per process GC and processes in Erlang are implemented the same way on all platforms which isn't the case with OS threads. But I don't fully understand technically why Erlang processes are so much more efficient and has much smaller memory footprint per process. Both the OS and Erlang VM has to do scheduling, context switches and keep track of the values in the registers and so on... Simply why isn't OS threads implemented in the same way as processes in Erlang? Does it have to support something more? and why does it need a bigger memory footprint? Technically why is processes in Erlang more efficient than OS threads? And why can't threads in the OS be implemented and managed in the same efficient way?

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• Is there a way to declare a variable that implements multiple interfaces in .Net?

  - by Bryan Anderson

  Similar to this Java question. I would like to specify that a variable implements multiple interfaces. For instance private {IFirstInterface, ISecondInterface} _foo; public void SetFoo({IFirstInterface, ISecondInterface} value) { _foo = value; } Requirements: I don't have the ability to add an interface to most type that would be passed in to Foo. So I can't create a third interface that inherits from IFirstInterface and ISecondInterface. I would like to avoid making the containing class generic if possible because the type of Foo doesn't have much to do with the class and the user isn't likely to know it at compile time. I need to use foo to access methods in both interfaces at a later time. I would like to do this in a compiler safe way, i.e. no trying to cast to the interface just before trying to use it. If foo does not implement both interfaces quite a bit of functionality won't work properly. Is this possible?

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