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  • C++ porting templates to Red hat enterprise linux version 5

    - by mkal
    #include <sys/stat.h> #include <sys/types.h> #include <unistd.h> template <class OutType> bool getVAL(OutType &value_out, const std::string &key) { return false; } int main (int argc, char*argv[]) { mode_t a; getVAL(a, "abc"); } test.cpp:6: error: ISO C++ forbids declaration of ‘parameter’ with no type test.cpp: In function ‘int main(int, char**)’: test.cpp:13: error: no matching function for call to ‘getVAL(mode_t&, const char [4])’

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  • Sniffing LPT Traffic

    - by ArcherT
    I need to intercept LPT output traffic. After a couple of hours of research, I've come to understand that the only way to do this is by writing a kernel-mode driver, more precisely a "filter driver"...? I've downloaded the WDK, but the terminology and vast number of driver types is a little overwhelming. I'm basically trying to understand what kind of driver I should be writing; my target environment is Windows XP SP2 and 3 only. Some background info, if it matters: I have a bunch of legacy DOS apps that print to LPT1. I'd like to be able to capture this output and redirect this data (after GDI calls) to a modern USB (network) printer. Fortunately, the latter part of the problem's easy. I'm hoping someone could point me in the right direction. TIA.

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  • Mapping a boolean[] PostgreSql column with Hibernate

    - by teabot
    I have a column in a PostgreSql database that is defined with type boolean[]. I wish to map this to a Java entity property using Hibernate 3.3.x. However, I cannot find a suitable Java type that Hibernate is happy to map to. I thought that the java.lang.Boolean[] would be the obvious choice, but Hibernate complains: Caused by: org.hibernate.HibernateException: Wrong column type in schema.table for column mycolumn. Found: _bool, expected: bytea at org.hibernate.mapping.Table.validateColumns(Table.java:284) at org.hibernate.cfg.Configuration.validateSchema(Configuration.java:1130) I have also tried the following property types without success: java.lang.String java.lang.boolean[] java.lang.Byte[] How can I map this column?

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  • How can I use a value from a session variable as part of the group name in signalR

    - by user1844734
    Hi I am trying to set up signalR to distribute messages to web users the problem is that the one site holds different 'areas' and also 'user types'. The Area is decided when the user visits the site by passing a url parameter, this is then stored in a session variable, The 'user type' is by default not logged in then changed when the user logs in to there user type (returned from a webservice) and stored in a User object. My aim was to connect to the hub using signalR when the user visits the site and add the users connectionId to a groupname, using the 'area id' from the session and the 'user type id' from the User object in the context. The problem I am having is that I can obtain the user id but when it comes to the area id signalR cannot access the session. I understand the reasoning behind not allowing the session available in signalR but does any one know if there is a way to enable this or an alternative way that I can gain access to the users area so that I can create these unique groups.

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  • Marshal a list of objects from VB6 to C#

    - by Andrew
    I have a development which requires the passing of objects between a VB6 application and a C# class library. The objects are defined in the C# class library and are used as parameters for methods exposed by other classes in the same library. The objects all contain simple string/numeric properties and so marshaling has been relatively painless. We now have a requirement to pass an object which contains a list of other objects. If I was coding this in VB6 I might have a class containing a collection as a member variable. In C# I might have a class with a List member variable. Is it possible to construct a C# class in such a way that the VB6 application could populate this inner list and marshal it successfully? I don't have a lot of experience here but I would guess Id have to use an array of Object types.

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  • Add HTMl to CCK within Drupal

    - by Romelus96
    Hello im a newbie at using Drupal, and have come across a block in my progress. I have been using CCK to add new content types to my forms. I was wondering if there was any way to add to the form that is generated so that i may contain the elements and also insert visual html code like head rules etc. I have dabbled with the hook_form_alter() and it does not seem to help me in my efforts. Ive been through adjusting tpl.php files and such and have made no progress. Please if there is any one there in the inter-webs who is knowledgeable on this matter your advice would be greatly appreciated. Here is just an example of what I would want to do within the form: 1. Contain field elements within DIV's 2. Add HTML Content into the form

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  • How was non-decimal money represented in software?

    - by dan04
    A lot of the answers to the questions about the accuracy of float and double recommend the use of decimal for monetary amounts. This works because today all currencies are decimal except MGA and MRO, and those have subunits of 1/5 so are still decimal-friendly. But what about the software used in U.S. stock markets when prices were in 1/16ths of dollar? The accuracy of binary data types wouldn't have been an issue, right? Going further back, how did pre-1971 British accounting software deal with pounds, shillings, and pence? Did their versions of COBOL have a special PIC clause for it? Were all amounts stored in pence? How was decimalisation handled?

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  • Best way to store enum values in database - String or Int

    - by inutan
    Hello there, I have a number of enums in my application which are used as property type in some classes. What is the best way to store these values in database, as String or Int? FYI, I will also be mapping these attribute types using fluent Nhibernate. Sample code: public enum ReportOutputFormat { DOCX, PDF, HTML } public enum ReportOutputMethod { Save, Email, SaveAndEmail } public class ReportRequest { public Int32 TemplateId { get { return templateId; } set { templateId = value; } } public ReportOutputFormat OutputFormat { get { return outputFormat; } set { outputFormat = value; } } public ReportOutputMethod OutputMethod { get { return outputMethod; } set { outputMethod = value; } } }

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  • Looking for an alternative to cfdump

    - by invertedSpear
    I think I just realized how restrictive my web host is when they wouldn't let me use cfdump. This actually kind of angers me, cause really, what harm is dump going to do? Anyway my question is has anyone written a cfdump alternative that will kick out complex types of data or can link me to a site with a code example? Can't really used cfc's or udfs either cause guess what, they're blocked too. Anyway looking for something simple that I can just paste in my cfml and I will be happy. It's sad that I used to be able to do this, but have forgotten a lot of that skillset since I moved into Flex and AS. oh and they're using cf7, so no cf8 or 9 tricks ;-) Thanks in advance.

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  • Compiler warning when passing NSError ** as a method parameter

    - by splicer
    I've been scratching my head about this for the last 4 hours, trying out all kinds of little experiments, but I can't seem to figure out what's going wrong. Could this be a compiler bug? Test.m: - (id)initWithContentsOfURL:(NSURL *)aURL error:(NSError **)error { if (!(self = [super init])) { return nil; } return self; } main.m: NSError *error; Test *t = [[Test alloc] initWithContentsOfURL:[NSURL fileURLWithPath:@"/"] error:&error]; Here's the compiler warning (from main.m): warning: incompatible Objective-C types 'struct NSError **', expected 'struct NSDictionary **' when passing argument 2 of 'initWithContentsOfURL:error:' from distinct Objective-C type I'm using the latest versions of Xcode and Snow Leopard.

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  • C++ to bytecode compiler for Silverlight CLR?

    - by paleozogt
    I'd like to be able to compile a C/C++ library so that it runs within a safe managed runtime in the Silverlight CLR. There are several tools for doing this with the JVM that allows C++ code to run within a CRT emulation layer (see NestedVM, LLJVM, etc), which effectively allows C++ code to be run within a Java Applet. There's even a tool for this for the Adobe Flash VM (see Alchemy). However, I can't seem to find any tools like this for the CLR. fyi, the MSVC tools don't seem to allow for this: The /clr:pure flag will create C++ code that runs in the CLR, but it isn't safe (because the CRT isn't safe) and /clr:safe requires massive code changes (no native types, etc).

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  • Efficiency of checking for null varbinary(max) column ?

    - by Moe Sisko
    Using SQL Server 2008. Example table : CREATE table dbo.blobtest (id int primary key not null, name nvarchar(200) not null, data varbinary(max) null) Example query : select id, name, cast((case when data is null then 0 else 1 end) as bit) as DataExists from dbo.blobtest Now, the query needs to return a "DataExists" column, that returns 0 if the blob is null, else 1. This all works fine, but I'm wondering how efficient it is. i.e. does SQL server need to read in the whole blob to its memory, or is there some optimization so that it just does enough reads to figure out if the blob is null or not ? (FWIW, the sp_tableoption "large value types out of row" option is set to OFF for this example).

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  • WPF Skin Skinning Security Concerns

    - by Erik Philips
    I'm really new to the WPF in the .Net Framework (get that out of the way). I'm writing an application where the interface is very customizable by simply loading .xaml (at the moment a Page element) files into a frame and then mapping the controls via names as needed. The idea is to have a community of people who are interested in making skins, skin my application however they want (much like Winamp). Now the question arises, due to my lack of Xaml knowledge, is it possible to create malicious Xaml pages that when downloaded and used could have other embedded Iframes or other elements that could have embed html or call remote webpages with malicious content? I believe this could be the case. If this is the case then I two options; either I have an automated process that can remove these types of Xaml files by checking it’s elements prior to allowing download (which I would assume would be most difficult) or have a human review them prior to download. Are there alternatives I’m unaware of that could make this whole process a lot easier?

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  • A tool to find and fix incomplete source code documentation

    - by Pekka
    I have several finished, older PHP projects with a lot of includes that I would like to document in javadoc/phpDocumentor style. While working through each file manually and being forced to do a code review alongside the documenting would be the best thing, I am, simply out of time constraints, interested in tools to help me automate the task as much as possible. The tool I am thinking about would ideally have the following features: Parse a PHP project tree and tell me where there are undocumented files, classes, and functions/methods (i.e. elements missing the appropriate docblock comment) Provide a method to half-way easily add the missing docblocks by creating the empty structures and, ideally, opening the file in an editor (internal or external I don't care) so I can put in the description. Optional: Automatic recognition of parameter types, return values and such. But that's not really required. The language in question is PHP, though I could imagine that a C/Java tool might be able to handle PHP files after some tweaking. Thanks for your great input!

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  • How do I get real integer overflows in MATLAB/Octave?

    - by marvin2k
    I'm working on a verification-tool for some VHDL-Code in MATLAB/Octave. Therefore I need data types which generate "real" overflows: intmax('int32') + 1 ans = -2147483648 Later on, it would be helpful if I can define the bit width of a variable, but that is not so important right now. When I build a C-like example, where a variable gets increased until it's smaller than zero, it spins forever and ever: test = int32(2^30); while (test > 0) test = test + int32(1); end Another approach I tried was a custom "overflow"-routine which was called every time after a number is changed. This approach was painfully slow, not practicable and not working in all cases at all. Any suggestions?

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  • WPF Binding Collection To ComboBox and Selecting an item

    - by Adam Driscoll
    I've been knocking my head against this for some time now. I'm not really sure why it isn't working. I'm still pretty new to this whole WPF business. Here's my XAML for the combobox <ComboBox Width="200" SelectedValuePath="Type.FullName" SelectedItem="{Binding Path=Type}" Name="cmoBox" > </ComboBox> Here's what populates the ComboBox (myAssembly is a class I created with a list of possible types) cmoBox.ItemsSource = myAssembly.PossibleTypes; I set the DataContext in a parent element of the ComboBox in the code behind like this: groupBox.DataContext = listBox.SelectedItem; I want the binding to select the correct "possible type" from the combo box. It doesn't select anything. I have tried SelectedValue and SelectedItem. When I changed the DisplayMemberPath of the ComboBox to a different property it changed what was displayed so I know it's not completely broken. Any ideas???

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  • UITableViewCellStyleDefault label width

    - by Rob Bonner
    Hello all, I am getting some odd behavior from stock table cells, or maybe not odd, maybe I am making some assumptions. I create the cells as follows: cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; Then I assign an image to the default imageView property. My image usually comes in from a user, so it might be larger than the default size. To take care of this I: [cell.imageView setContentMode:UIViewContentModeScaleAspectFit]; which I expected to scale the image for me within the control, but in reality, the images are all over the map. So, is there a proper way to constrain the image in stock cell types? Thanks in advance!

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  • Naming convention for the primary key in a Table

    - by kwokwai
    Hi all, I am learning the Model relationship types in cakephp. I have built twotables and in one of the Table A, I got these fields in it: Table A {postID, topic, content} Table B {replyID, content, postID} And when I ran the web page, a bunch of error related to SQL popped up saying that cakephp couldn't find post_id. It is weird that I have already declared the $primaryKey to be using postID in the tableA.php under Models folder, but cakephp seemed want me to change the ID field to post_id instead of postID, because the error disappeared after I have changed the primaryKey to post_id. ANy ideas?

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  • Flexible argument list in LibreOffice Calc Macro

    - by Patru
    I want to write a function that geometrically links performance data which is usually provided as percentages, so the function will basically return (1+a)*(1+b)*(1+c)* … *(1+x)-1 This should be done using LibreOffice-calc and it should behave similarly to the regular sum function. As you may throw any number of arguments at sum I would like to be able to do the same with my alternative geoSum function but I am unable to find suitable documentation on handling a variable number of arguments with variable types (i.e. an arbitrary mix of numbers, cells and ranges). How would I have to specify the arguments to my LibreOffice-Basic function and how would I have to interpret it?

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  • Custom iPad 10-key popover possible.

    - by Rick
    Hello everyone, and thanks for your responses in advance. I have been looking around for the possibility of having a 10-key, numeric only, input available when a user clicks on certain fields that do not require the use of the full size keyboard. I know that popovers can properly display custom types of input, but does anyone know if there is a way for a standard 10-keypad to display in a popover? And if so, can you point me in the right direction. Again, thanks in advance. -Rick

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  • How do I correctly model data in SQL-based databases that have some columns in common, but also have

    - by Brandon Weiss
    For instance, let's say I have a User model. Users have things like logins, passwords, e-mail addresses, avatars, etc. But there are two types of Users that will be using this site, let's say Parents and Businesses. I need to store some different information for the Parents (e.g. childrens' names, domestic partner, salaries, etc.) than for the Businesses (e.g. industry, number of employees, etc.), but also some of it is the same, like logins and passwords. How do I correctly structure this in a SQL-based database? Thanks!

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  • R: ggplot2, how to add a number of layers to a plot at once to reduce code

    - by John
    library(ggplot2) This code produces a nice looking plot: qplot(cty, hwy, data = mpg, colour = displ) + scale_y_log2() + labs(x="x axis") + labs(y="y axis") + opts(title = "my title") But I want to setup variables to try and to reduce code repetition: log_scale <- scale_y_log2() xscale <- labs(x="x axis") yscale <- labs(y="y axis") title <- opts(title = "my title") my_scales <- c(log_scale, xscale, yscale, title) # make a variable to hold the scale info changes above So that I can do this and add a bunch of things at the same time: qplot(cty, hwy, data = mpg, colour = displ) + my_scales # add these to your plot. but I get this error: Error in object$class : $ operator is invalid for atomic vectors I realize that the things going into my_scales need to be layers / different types of objects, but I don't see what they should be.

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  • Integrating Jython Cpython

    - by eric.frederich
    I am about to begin a project where I will likely use PyQt or Pyside. I will need to interface with a buggy 3rd party piece of server software that provides C++ and Java APIs. The Java APIs are a lot easier to use because you get Exceptions where with the C++ libraries you get segfaults. Also, the Python bindings to the Java APIs are automatic with Jython whereas the Python bindings for the C++ APIs don't exist. So, how would a CPython PyQt client application be able to communicate with these Java APIs? How would you go about it? Would you have another separate Java process on the client that serializes / pickles objects and communicates with the PyQt process over a socket? I don't want to re-invent the wheel... is there some sort of standard interface for these types of things? Some technology I should look into? RPC, Corba, etc? Thanks, ~Eric

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  • Validating class and superclass on RoR

    - by Luís Guilherme
    In ruby, you have an attribute called "type" which is the class of the object. Rails stores this at the database in a column called type. So, if I have several blog "types", I can do something like this def create @blog = Blog.new(params[:blog]) @blog[:type] = params[:blog][:type] # ... end If I add someone like this, and then load it, and ask its class (for instance, at the console), I have the right class name answered back. However, when I save it afterwards, rails will run only the superclass validators, not the ones I defined in the subclass. How should I make rails run the subclass validators?

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  • How is ImmutableObjectAttribute used?

    - by Thomas Levesque
    I was looking for a built-in attribute to specify that a type is immutable, and I found only System.ComponentModel.ImmutableObjectAttribute. Using Reflector, I checked where it was used, and it seems that the only public class that uses it is System.Drawing.Image... WTF? It could have been used on string, int or any of the primitive types, but Image is definitely not immutable, there are plenty of ways to alter its internal state (using a Graphics or the Bitmap.SetPixel method for instance). So the only class in the BCL that is explicitly declared as immutable, is mutable! Or am I missing something?

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