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  • In listview,Viewstub cannot be found after the previous one is inflate

    - by user2958132
    I am using some list item layout and in the item layout, there is a Viewstub where I want to put some image in.I don't have the source of list item layout and just know there are some TextViews and ViewStubs in it. My purpose is to find the ViewStub first and set my personal layout and play with it. However, some of the ViewStub cannot be found. public class TJAdapter extends CursorAdapter { .... public void bindView(View view, Context context, Cursor cursor) { ViewStub contentstub = (ViewStub)item.findViewById(R.id.content_stub); if (contentstub == null){ LOG.error("TJ,contentstub is null"); } else { LOG.error("TJ,contentstub is not null"); contentstub.setLayoutResource(R.layout.icon_image); View iconImage = contentstub.inflate(); } .... } public View newView(Context context, Cursor cursor, ViewGroup parent) { final View view = mInflater.inflate(R.layout.list_item, parent, false); bindView(view, context, cursor); } And the log output is like this: TJ,bindView is called TJ,contentstub is not null TJ,bindView is called TJ,contentstub is null TJ,bindView is called TJ,contentstub is not null TJ,bindView is called TJ,contentstub is not null TJ,bindView is called TJ,contentstub is null TJ,bindView is called TJ,contentstub is not null I spent a lot of time on it and have no idea why this happens. Can some body help?

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  • Asymptotic complexity of a compiler

    - by Meinersbur
    What is the maximal acceptable asymptotic runtime of a general-purpose compiler? For clarification: The complexity of compilation process itself, not of the compiled program. Depending on the program size, for instance, the number of source code characters, statements, variables, procedures, basic blocks, intermediate language instructions, assembler instructions, or whatever. This is highly depending on your point of view, so this is a community wiki. See this from the view of someone who writes a compiler. Will the optimisation level -O4 ever be used for larger programs when one of its optimisations takes O(n^6)? Related questions: When is superoptimisation (exponential complexity or even incomputable) acceptable? What is acceptable for JITs? Does it have to be linear? What is the complexity of established compilers? GCC? VC? Intel? Java? C#? Turbo Pascal? LCC? LLVM? (Reference?) If you do not know what asymptotic complexity is: How long are you willing to wait until the compiler compiled your project? (scripting languages excluded)

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  • Java: volatile guarantees and out-of-order execution

    - by WizardOfOdds
    Note that this question is solely about the volatile keyword and the volatile guarantees: it is not about the synchronized keyword (so please don't answer "you must use synchronize" for I don't have any issue to solve: I simply want to understand the volatile guarantees (or lack of guarantees) regarding out-of-order execution). Say we have an object containing two volatile String references that are initialized to null by the constructor and that we have only one way to modify the two String: by calling setBoth(...) and that we can only set their references afterwards to non-null reference (only the constructor is allowed to set them to null). For example (it's just an example, there's no question yet): public class SO { private volatile String a; private volatile String b; public SO() { a = null; b = null; } public void setBoth( @NotNull final String one, @NotNull final String two ) { a = one; b = two; } public String getA() { return a; } public String getB() { return b; } } In setBoth(...), the line assigning the non-null parameter "a" appears before the line assigning the non-null parameter "b". Then if I do this (once again, there's no question, the question is coming next): if ( so.getB() != null ) { System.out.println( so.getA().length ); } Am I correct in my understanding that due to out-of-order execution I can get a NullPointerException? In other words: there's no guarantee that because I read a non-null "b" I'll read a non-null "a"? Because due to out-of-order (multi)processor and the way volatile works "b" could be assigned before "a"? volatile guarantees that reads subsequent to a write shall always see the last written value, but here there's an out-of-order "issue" right? (once again, the "issue" is made on purpose to try to understand the semantics of the volatile keyword and the Java Memory Model, not to solve a problem).

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  • Touch coordinates in iPhone landscape mode app

    - by gok
    I am trying to make this landscape only iphone app. I only use this code for this purpose: - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return (interfaceOrientation == UIInterfaceOrientationLandscapeRight); } However when I click clip subviews checkbox from interface builder, the view is clipped from the middle. I also don't receive any touch events from outside of view bounds obviously. - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { CGPoint fingerPos = [[touches anyObject] locationInView:self.view]; NSLog(@"%f %f",fingerPos.x,fingerPos.y); } only prints for coordinates between 20 and 320 for X. But Y works fine. When i try to modify bounds by hand, everything works fine; View is positioned and shown correctly, printed coordinates are correct, I receive touch from all of the screen except between 0 and 20 for X. So Left side of the screen is unresponsive to touch events for only 20 pixels. Code I use to modify bounds: self.view.bounds = CGRectMake(-180.0f, 0.0f, 680.0f, 480.0f); What might be causing this? Weird!

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  • Managing common components with Fossil CVS

    - by Larry Lustig
    I'm a Fossil (and CVS configuration novice) attempting to create and manage a set of distributed Fossil repositories for a Delphi project. I have the following directory tree: Projects Some Project Delphi Components LookupListView Some Client Some Project For Client Some Other Project For Client Source Code Project Resources Project Database I am setting up Fossil version control in order to version and share Projects\Some Client\Some Other Project For Client\Source Code, which contains Delphi 2010 source for a database project. This project makes use of Projects\Delphi Components\LookupListView which is a Delphi component. I need this code to be included in the versioning system for my project. I will, in theory, need to include it in other Fossil repositories in the future, as well. If I create my Fossil repository at the Source Code or Some Other Project For Client level, I cannot add any code above that level to my repository. What is the proper way to deal with this? The two solutions that occur to me are 1) Creating a separate repository for LookupListView and make sure that everyone who uses a repository for a project that references it "knows" that they must also get the current version of this project as well. This seems to defeat the purpose of being able to obtain a complete, current version of the project with a single checkout. The problem is magnified because there are other common component dependencies in this project. 2) Establishing my Fossil repository in the Projects directory, so I can check in files from various subfolders. This seems to me to involve an awful lot of extra path-typing when doing adds, and also to impose my directory structure (Some Client\Some Other Project For Client\Source) on the other users of the repository -- in this case, the actual client. Any suggestions appreciated.

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  • From VB6 to .net via COM and Remoting...What a mess!

    - by Robert
    I have some legacy vb6 applications that need to talk to my .Net engine application. The engine provides an interface that can be connected to via .net Remoting. Now I have a stub class library that wraps all of the types that the interface exposes. The purpose of this stub is to translate my .net types into COM-friendly types. When I run this class library as a console application, it is able to connect to the engine, call various methods, and successfully return the wrapped types. The next step in the chain is to allow my VB6 application to call this COM enabled stub. This works fine for my main engine-entry type (IModelFetcher which is wrapped as COM_ModelFetcher). However, when I try and get any of the model fetcher's model types (IClientModel, wrapped as COM_IClientModel, IUserModel, wrapped as COM_IUserModel, e.t.c.), I get the following exception: [Exception - type: System.InvalidCastException 'Return argument has an invalid type.'] in mscorlib at System.Runtime.Remoting.Proxies.RealProxy.ValidateReturnArg(Object arg, Type paramType) at System.Runtime.Remoting.Proxies.RealProxy.PropagateOutParameters(IMessage msg, Object[] outArgs, Object returnValue) at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg) at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type) at AWT.Common.AWTEngineInterface.IModelFetcher.get_ClientModel() at AWT.Common.AWTEngineCOMInterface.COM_ModelFetcher.GetClientModel() The first thing I did when I saw this was to handle the 'AppDomain.CurrentDomain.AssemblyResolve' event, and this allowed me to load the required assemblies. However, I'm still getting this exception now. My AssemblyResolve event handler is loading three assemblies correctly, and I can confirm that it does not get called prior to this exception. Can someone help me untie myself from this mess of interprocess communication?!

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  • How to build n-layered web architecture with PHP?

    - by Alex
    I have a description and design of a website and I need to redesign it to allow for new requirements. The website's purpose is the offering of government's contracts and bidding opportunities for different businesses.I'm dealing with the 3-tier architecture PHP website comprising of the user-interface tier(client's web browser),business logic layer(Apache web server with PHP engine in it and a couple of applications running within a web server as well) and a database layer(local mysql database). Now,i need to redesign it to su???rt distributed n-tier architecture and specify how I would go about it.After long hours of research i came to this solution: business logic should be separated into presentation and purely business logic tier to allow for n-layer architecture(user-interface,presentation tier,b.logic and data tier).I have decided to use ??? just for the presentation(since the original existing website is in PHP) and use it within apache web server.In the business logic i want to use J2?? implementation technology instead of implementing it in PHP(i.e using Zend app.server and smarty template) cz J2EE can provide much more essential container services which are essential for business logic,its robustness,maintainability and different critical business operations which will be carried out by the g?v?rnment's website.So,particularly,i want to use J??ss app.server with ?J? business objects in it which would provide all the b.logic in java and would interact with the database and so forth.In order to connect PHP on a web server with java on app.server i'm gonna use PHP/Java bridge API (or maybe Quercus or SOAP is better?).Finally,i have my data tier with mysql which will communicate with b.logic via JD??.Payment system application in ???.server is gonna use S??? to talk with credit card company. From your professional point of view,does it sound like a good way of redesigning the original website to allow for n-tier architecture considering the specifics of the website and the criticality of its operations?(payment system is included in it)or u would personally prefer to use PHP business objects for business logic as well instead of J2EE?If you have any wiser recommendation or some alternative,please let me know what is right or wrong in my current solution. H??? to hear your professional advice very s??n (I'm new to the area of web development) Thanks in advance

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  • Project setup for an ADO.NET/WCF DataService

    - by Slauma
    I'd like to implement a ADO.NET/WCF DataService and I am wondering what's the best way to setup a project in VS2008 SP1 for this purpose. Currently I have an ASP.NET web application project (not of "WebSite" project type). The data access layer is an Entity model (EF version 1) with SQL Server database. I have the Entity Model in a separate DLL project and the web application project references to this assembly for all data accesses. The ADO.NET/WCF DataService needs to communicate with the Entity model/database as well. It has to be hosted on the same web server (IIS 7.5) together with the web application. Since the DataService is not directly related to that specific web application (though it will provide and modify data from/in the same database the web application uses as well) my basic idea was to separate the DataService in its own new project (which also references the Entity Model DLL). Now I have seen that there is no project type "ADO.NET/WCF DataService" in VS2008 SP1. It seems only possible to add a DataService as an element to other existing projects, for instance Web Application projects. Why isn't there a separate DataService project type? Does this mean now that I have to add the DataService as an element to my Web Application project? Or shall I create a new Web Application project and add a DataService to it? (I could delete the pregenerated default.aspx since I do not need any web pages in this project.) What's the best way? Thank you for suggestions in advance!

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  • jquery newbie: combine validate with hidding submit button.

    - by Jeffb
    I'm new a jQuery. I have gotten validate to work with my form (MVC 1.0 / C#) with this: <script type="text/javascript"> if (document.forms.length > 0) { document.forms[0].id = "PageForm"; document.forms[0].name = "PageForm"; } $(document).ready(function() { $("#PageForm").validate({ rules: { SigP: { required: true } }, messages: { SigP: "<font color='red'><b>A Sig Value is required. </b></font>" } }); }); </script> I also want to hide the Submit button to prevent twitchy mouse syndrome from causing duplicate entry before the controller completes and redirects (I'm using an GPR pattern). The following works for this purpose: <script type="text/javascript"> // // prevent double-click on submit // jQuery('input[type=submit]').click(function() { if (jQuery.data(this, 'clicked')) { return false; } else { jQuery.data(this, 'clicked', true); return true; } }); </script> However, I can't get the two to work together. Specifically, if validate fails after the Submit button is clicked (which happens given how the form works), then I can't get the form submitted again unless I do a browser refresh that resets the 'clicked' property. How can I rewrite the second method above to not set the clicked property unless the form validates? Thx.

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  • Using NHibernate's HQL to make a query with multiple inner joins

    - by Abu Dhabi
    The problem here consists of translating a statement written in LINQ to SQL syntax into the equivalent for NHibernate. The LINQ to SQL code looks like so: var whatevervar = from threads in context.THREADs join threadposts in context.THREADPOSTs on threads.thread_id equals threadposts.thread_id join posts1 in context.POSTs on threadposts.post_id equals posts1.post_id join users in context.USERs on posts1.user_id equals users.user_id orderby posts1.post_time where threads.thread_id == int.Parse(id) select new { threads.thread_topic, posts1.post_time, users.user_display_name, users.user_signature, users.user_avatar, posts1.post_body, posts1.post_topic }; It's essentially trying to grab a list of posts within a given forum thread. The best I've been able to come up with (with the help of the helpful users of this site) for NHibernate is: var whatevervar = session.CreateQuery("select t.Thread_topic, p.Post_time, " + "u.User_display_name, u.User_signature, " + "u.User_avatar, p.Post_body, p.Post_topic " + "from THREADPOST tp " + "inner join tp.Thread_ as t " + "inner join tp.Post_ as p " + "inner join p.User_ as u " + "where tp.Thread_ = :what") .SetParameter<THREAD>("what", threadid) .SetResultTransformer(Transformers.AliasToBean(typeof(MyDTO))) .List<MyDTO>(); But that doesn't parse well, complaining that the aliases for the joined tables are null references. MyDTO is a custom type for the output: public class MyDTO { public string thread_topic { get; set; } public DateTime post_time { get; set; } public string user_display_name { get; set; } public string user_signature { get; set; } public string user_avatar { get; set; } public string post_topic { get; set; } public string post_body { get; set; } } I'm out of ideas, and while doing this by direct SQL query is possible, I'd like to do it properly, without defeating the purpose of using an ORM. Thanks in advance!

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  • PCA extended face recognition

    - by cMinor
    The state of the art says that we can use PCA to perform face recognition. like this, this or this I am working with a project that involves training a classifier to detect a person who is wearing glasess or hats or even a mustache. The purpose of doing this is to detect when a person that has robbed a bank, store, or have commeted some sort of crime(s) (we have their image in a database), enters a certain place ( historically we know these guys have robbed, so we should take care to avoid problems). We came first to have a distributed database with all images of criminals, then I thought to have a layer of them clasifying these criminals using accesories like hats, mustache or anything that hides their face etc... Then, to apply that knowledge to detect when a particular or a suspect person enters a comercial place. ( In practice when someone is going to rob not all the times they are using an accesorie...) What do you think about this idea of doing PCA to first detect principal components of the face and then the components of an accesory. I was thinking that maybe a probabilistic approach is better so we can compute the probability the criminal is the person that entered a place and call the respective authorities.

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  • Algorithms for finding a numerical record in a list of ordered numbers

    - by Ankur
    I have a list of incomplete ordered numbers. I want to find a particular number with as few steps as possible. Are there any improvements on this algorithm, I assume you can count the set size without difficulty - it will be stored and updated every time a new item is added. Your object is to get your cursor over the value x The first number (smallest) is s, and the last number (greatest) is g. Take the midpoint m1 of the set: calculate is x < m1, If yes then s <= x < m1 If no then m1 < x <= g If m1 = x then you're done. Keep repeating till you find x. Basically dividing the set into two parts with each iteration till you hit x. The purpose is to retrieve a numerical id from a very large table to then find the associated other records. I would imagine this is the most trivial kind of indexing available, are there improvements?

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  • How should I go about implementing a points-to analysis in Maude?

    - by reprogrammer
    I'm going to implement a points-to analysis algorithm. I'd like to implement this analysis mainly based on the algorithm by Whaley and Lam. Whaley and Lam use a BDD based implementation of Datalog to represent and compute the points-to analysis relations. The following lists some of the relations that are used in a typical points-to analysis. Note that D(w, z) :- A(w, x),B(x, y), C(y, z) means D(w, z) is true if A(w, x), B(x, y), and C(y, z) are all true. BDD is the data structure used to represent these relations. Relations input vP0 (variable : V, heap : H) input store (base : V, field : F, source : V) input load (base : V, field : F, dest : V) input assign (dest : V, source : V) output vP (variable : V, heap : H) output hP (base : H, field : F, target : H) Rules vP(v, h) :- vP0(v, h) vP(v1, h) :- assign(v1, v2), vP(v2, h) hP(h1, f,h2) :- store(v1, f, v2), vP(v1, h1), vP(v2, h2) vP(v2, h2) :- load(v1, f, v2), vP(v1, h1), hP(h1, f, h2) I need to understand if Maude is a good environment for implementing points-to analysis. I noticed that Maude uses a BDD library called BuDDy. But, it looks like that Maude uses BDDs for a different purpose, i.e. unification. So, I thought I might be able to use Maude instead of a Datalog engine to compute the relations of my points-to analysis. I assume Maude propagates independent information concurrently. And this concurrency could potentially make my points-to analysis faster than sequential processing of rules. But, I don't know the best way to represent my relations in Maude. Should I implement BDD in Maude myself, or Maude's internal unification based on BDD has the same effect?

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  • How to use ASP.NET Routing in a Quote of the Day Website

    - by SidC
    Good Afternoon, A client is interested in creating an ASP.NET 2.0 website whose purpose is to serve up a "quote of the day". He wants the quotes on static content pages all attached to the same master page. The quote pages must be viewed in a certain sequence, and site browsers cannot view any other pages than the starting page when browsing to the site. That is, everyone must go to page 001.aspx when entering the site. Two Questions: 1. The content pages are going to be created by the client using an excel data source and a merge process by which each quote page is created eg. 001.aspx, 002.aspx etc. This seems clunky to me at best. Would ASP.NET Dynamic Data be a better solution here? I'm new to ASP.NET Routing and URL Rewriting as a whole. How would I setup a route table to ensure that users always entered the site on the same entry page, and create a route table such that default.aspx resolves to 001.aspx? Thanks, Sid

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  • How to use Svn Version Task to set the Version of a vb project

    - by SchlaWiener
    I have a Visual Studio 2008 Solution where the main output exe is a VB.Net Winforms exe which has several VB.Net and C# dll's linked from the same solution. The whole solution is under version control with subversion. Now I want to automagically update by generated files with the current svn revision number. For this purpose I found this neat project: http://svnversiontasks.codeplex.com/ You also need the MSBuild.Communuity.Tasks for this to work. There was a msbuild example on how to update the rev number for every single project in your solution which I use: <Import Project="$(MSBuildExtensionsPath)\SvnTools.Targets\SvnTools.Tasks.VersionManagement.Tasks" /> <Target Name="build"> <CreateItem Include="../**/AssemblyInfo.vb;../**/AssemblyInfo.cs;../**/Properties/AssemblyInfo.cs"> <Output TaskParameter="Include" ItemName="AssemblyInfoFiles" /> </CreateItem> <CreateItem Include="../**/*.vdproj;*.vdproj"> <Output TaskParameter="Include" ItemName="DeploymentProjectFiles" /> </CreateItem> <UpdateVersion AssemblyInfoFiles="@(AssemblyInfoFiles)" DeploymentProjectFiles="@(DeploymentProjectFiles)" Format="yyyy.mm.dd.rev" /> <Exec Command="&quot;$(VS90COMNTOOLS)..\IDE\devenv&quot; ..\MyApp.sln /build" /> <RevertVersionChange AssemblyInfoFiles="@(AssemblyInfoFiles)" DeploymentProjectFiles="@(DeploymentProjectFiles)" /> </Target> I modified the original file to also include the AssemblyInfo.vb file and saved it as a msbuild.proj file. However if I execute msbuild from the console I see that the C# projects are updated (I can also confirm that from the properties of the output dll but my vb project remains unchanged: Reverting version number change: ../App1\AssemblyInfo.vb Updating version number (to rev 0) for file: ../App1\AssemblyInfo.vb D:\Source\MyApp\MyAppDeploy\MyAppDeploy.csproj : warning : Version attribute not found, file not updated. Reverting version number change: ../App2\Properties\AssemblyInfo.cs Updating version number (to rev 0) for file: ../App2\Properties\AssemblyInfo.cs Successfully updated file. Maybe the task does not support VB.Net. But maybe someone has a solution for this...

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  • Redirect C++ std::clog to syslog on Unix

    - by kriss
    I work on Unix on a C++ program that send messages to syslog. The current code uses the syslog system call that works like printf. Now I would prefer to use a stream for that purpose instead, typically the built-in std::clog. But clog merely redirect output to stderr, not to syslog and that is useless for me as I also use stderr and stdout for other purposes. I've seen in another answer that it's quite easy to redirect it to a file using rdbuf() but I see no way to apply that method to call syslog as openlog does not return a file handler I could use to tie a stream on it. Is there another method to do that ? (looks pretty basic for unix programming) ? Edit: I'm looking for a solution that does not use external library. What @Chris is proposing could be a good start but is still a bit vague to become the accepted answer. Edit: using Boost.IOStreams is OK as my project already use Boost anyway. Linking with external library is possible but is also a concern as it's GPL code. Dependencies are also a burden as they may conflict with other components, not be available on my Linux distribution, introduce third-party bugs, etc. If this is the only solution I may consider completely avoiding streams... (a pity).

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  • What is the best way to parse python script file in C/C++ code

    - by alexpov
    I am embedding python in C/C++ program. What I am trying to do is to parse the python script file from the C/C++ program, break the file to "blocks" so that each "block" is an a valid command in python code. Each block I need to put into std::string. For example: #PythonScript.py import math print "Hello Python" i = 0; while (i < 10): print "i = " , i; i = i + 1; print "GoodBye Python" In this script are 5 different "blocks": the first one is "import math;" the second is "print "Hello Python;" the third is "i = 0;" and the fourth is while (i < 10):\n\tprint "i = " , i;\n\ti = i + 1; My knowledge in python is very basic and I am not familiar with the python code syntax. What is the best way to do this, is there any Python C/C++ API function that supports this? why i need it - for GUI purpose. My program , which is writen in C, uses python to make some calculations. I run from C code , using python C API , python script and what i need is a way to capture python's output in my program. I catch it and evrything is ok, the problem is when the script involves user input. What happens is that i capture python's output after the script is finished , therefore, when there is an input command in the script i get a black screen .... i need to get all the printings before the input command. The first solution i tried is to parss the script to valid commands and run each comand, one after the other , seperatly .... for this i need to pars the script and deside what is a command and what is not ... The question is : what is the best way to do this and if there is somthing that allready does ?

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  • COM Interop - Wait for Excel to Complete Operation

    - by roygbiv
    Hello, I am doing some COM Interop work with Excel and other Office Automation Software. A Co-Worker has mentioned to me that I need to wait for these Automation Servers to become ready after issuing a command to them. I, however, cannot see the purpose of this as don't all calls block until the automation server completes the given task? For example I would normally write: Dim o as AutomationObject = AutomationServer.CreateObject(x, y, z) o.Property ' could throw COM exception!!???? My co-worker says I need to sleep after that call because the the Automation Server could still be working on creating and initializing the object. Dim o as AutomationObject = AutomationServer.CreateObject(x, y, z) Threading.Sleep(5000) ' wait for AutomationServer to "become ready" o.Property ' could still throw COM exception!!???? The problem I have with this is that the AutomationServer calls should block until the AutomationServer finishes or completes what it was working on or at the very least it should be a loop checking if "o" is nothing, but that makes no sense because once the call returns its done! My question is, Is there any benefit to Sleeping after an AutomationServer call? Is there a method to "wait" until the AutomationServer finishes (if it does not in fact block)?

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  • Django1.1 model field value preprocessing before returning

    - by Satoru.Logic
    Hi, all. I have a model class like this: class Note(models.Model): author = models.ForeignKey(User, related_name='notes') content = NoteContentField(max_length=256) NoteContentField is a custom sub-class of CharField that override the to_python method in purpose of doing some twitter-text-conversion processing. class NoteContentField(models.CharField): __metaclass__ = models.SubfieldBase def to_python(self, value): value = super(NoteContentField, self).to_python(value) from ..utils import linkify return mark_safe(linkify(value)) However, this doesn't work. When I save a Note object like this: note = Note(author=request.use, content=form.cleaned_data['content']) note.save() The conversed value is saved into the database, which is not what I wanna see. What I'm trying to do is to save the raw content into the database, and only make the conversion when the content attribute is later accessed. Would you please tell me what's wrong with this? Thanks to Pierre and Daniel. I have figured out what's wrong. I thought the text-conversion code should be in either to_python or get_db_prep_value, and that's wrong. I should override both of them, make to_python do the conversion and get_db_prep_value return the unconversed value: from ..utils import linkify class NoteContentField(models.CharField): __metaclass__ = models.SubfieldBase def to_python(self, value): self._raw_value = super(NoteContentField, self).to_python(value) return mark_safe(linkify(self._raw_value)) def get_db_prep_value(self, value): return self._raw_value I wonder if there is a better way to implement this?

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  • virtualbox - debian with no-ip

    - by JohnWong
    Hi. I have VB on my XP SP3. I am running one guest OS, Debian. I installed it using the 150MB, and everything seems to work fine. I am using 3.1.6 VB The purpose of this server is running php, mysql and django project. So I need access both locally and externally. I usually do it with my no-ip. I have experience with Ubuntu server, and using noip2 was a cake. I had this "domain" xxx.no-ip.org. I need this to be use on my debian server, so that I can type xxx.no-ip.org into the firefox (on my xp). I checked ifconfig, pstree. They showed that debian grabbed the right ip (it matched with my ip), and pstree showed noip2 has already been activated (under init.d) But I can't access to xxx.no-ip.org from my windows in firefox how come? back in the days when I used ubuntu as its own installation (instead of VM), noip2 worked like a cake without any twist. Any thoughts? Thank you!

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  • How to open a document using an application launched via NSTask?

    - by zneak
    Hello world, I've grown tired of the built-in open Mac OS X command, mostly because it runs programs with your actual user ID instead of the effective user ID; this results in the fact sudo open Foo opens Foo with its associated application with your account instead of the root account, and it annoys me. So I decided to make some kind of replacement. So far I've been successful: I can open any program under the open -a or open -b fashion, and support optionally waiting. I'm using NSTask for that purpose. However, I'd like to be able to open documents too. As far as I can see, you need to use NSWorkspace for that, but using NSWorkspace to launch programs results in them being launched with your account's credentials instead of your command line program's credentials. Which is precisely what the default open tool does, and precisely what I don't want. So, how can I have a program request that another program opens a document without using NSWorkspace? From the NSTask object, I can have the process ID, but that's about it.

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  • Programmatical Creation of NSMappingModel

    - by enchilada
    I want to programmatically (without Lightweight Migration) create a mapping model between two models that are exactly the same, except one of the entities (there are a bunch of entities) has different attributes. Let's call this entity "Person". And let's say the destination model has 1) added a new attribute called "address" 2) deleted an attribute called "eyeColor" 3) kept (i.e. not done anything with) an attribute called "name" How would you create an NSMappingModel between these models programmatically? I happen to have some explicit questions that might help me do this by myself: Q1) Do I have to create NSEntityMapping objects for all of the entities other than "Person", even if they remain unchanged? Q2) How do I deal with the "address" attribute in "Person", which is a new one being created? Should I create an NSPropertyMapping for that somehow, that turns nothing into something ("address")? Q3) How do I deal with the "name" attribute in "Person"? Do I have to create an NSPropertyMapping for that, even though it simply stays the same? Q4) For the NSEntityMapping corresponding to "Person", is not creating any NSPropertyMapping for "eyeColor" a proper way to get it deleted? Or should I create an NSPropertyMapping for "eyeColor"? If yes, how would this object be created, i.e. what would determine that its purpose is to get rid of "eyeColor"? Thank you in advance, and I apologize not being able to answer these questions myself, as the documenation really has no good example of how to create NSMappingModels programmatically. Note again that I'm not allowed to use Lightweight Migration. I must do this manually.

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  • SHLoadImageFile(L"\\Program Files\\TrainingApp\\background.png"); whats that L in the argument for?

    - by ashishsony
    Hi, ive been working on c++ on linux for the past 2 years,and switched to windows c++ programming recently. can anyone tell me what that L is there in the argument of the function: SHLoadImageFile(L"\\Program Files\\TrainingApp\\background.png"); and on viewing certain sample code in MSVS C++ i came across hundereds of typedefs like.. LPARAM// typedef LONG_PTR LPARAM... here LONG_PTR is again typedef as __w64 long WPARAM// typedef UINT_PTR WPARAM... so there is a lot of chained typedefs.. I never saw this much of typedef chaining on c++ programming on linux using gcc.. what i want to say is that it just creates more confusion in this way for windows application programming.. while ive seen application programming on linux using frameworks like Qt.. there such things are rarely used.. so is there specific purpose in typedefining again and again on MSVSC++?? for eg.. there are typdefs like typedef int BOOL; whats the use of this when normal bool is available already..?? there are hundred other cases ive come across where just to decide what data type to use becomes so difficult.. it becomes difficult to understand a pre written code in this fashion too.. Thanks.

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  • What algorithms are suitable for this simple machine learning problem?

    - by user213060
    I have a what I think is a simple machine learning question. Here is the basic problem: I am repeatedly given a new object and a list of descriptions about the object. For example: new_object: 'bob' new_object_descriptions: ['tall','old','funny']. I then have to use some kind of machine learning to find previously handled objects that had similar descriptions, for example, past_similar_objects: ['frank','steve','joe']. Next, I have an algorithm that can directly measure whether these objects are indeed similar to bob, for example, correct_objects: ['steve','joe']. The classifier is then given this feedback training of successful matches. Then this loop repeats with a new object. a Here's the pseudo-code: Classifier=new_classifier() while True: new_object,new_object_descriptions = get_new_object_and_descriptions() past_similar_objects = Classifier.classify(new_object,new_object_descriptions) correct_objects = calc_successful_matches(new_object,past_similar_objects) Classifier.train_successful_matches(object,correct_objects) But, there are some stipulations that may limit what classifier can be used: There will be millions of objects put into this classifier so classification and training needs to scale well to millions of object types and still be fast. I believe this disqualifies something like a spam classifier that is optimal for just two types: spam or not spam. (Update: I could probably narrow this to thousands of objects instead of millions, if that is a problem.) Again, I prefer speed when millions of objects are being classified, over accuracy. What are decent, fast machine learning algorithms for this purpose?

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  • Silverlight 4 seems like starving of memory

    - by Marco
    I have been playing a bit with Silverlight and try to port my Silverlight 3.0 application to Silverlight 4.0. My application loads different XAP files and upon a user request create an instance of a Xaml user control and adds it to the main container, in a sort of MEF approach in order I can have an extensible and pluggable application. The application is pretty huge and to keep acceptable the performances and the initial loading I have built up some helper classes to load in the background all pages and user controls that might be used later on. On Silverlight 3.0 everything was running smoothly without any problem so far. Switching to SL 4.0 I have noticed that when the process approaches to create the instances of the user controls the layout freezes unexpectedly for a minute and sometimes for more. Looking at the task manager the memory usage of IE jumps from 50MB to 400MB and sometimes up to 1.5 GB. If the process won't take that much the layout is rendered properly even though the memory usage is still extremely high. Otherwise everything crashes due to out of memory exception. Running the same application compiled in SL3, the memory used is about 200MB when all the usercontrols are loaded. Time spent to load the application in SL3 is about 10 seconds, while it takes up to 3 mins in SL4 There are no transparencies, no opacities set, no effects and animations in the layout. User controls are instantied on the fly and added or removed in the visual tree on purpose when the user switches from one screen to another. The resources are all cleaned properly when a usercontrol is removed from the visual tree to allow the GC to operate in the background. I may do something wrong but I could not figure out where exactly nail out the source of this problem. As far as I know there is no memory profiler in SL4 that can help me out to find where to look at. But again I could not be updated on new debugging tools available.

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