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  • C++ smart pointer for a non-object type?

    - by Brian
    Hi, I'm trying to use smart pointers such as auto_ptr, shared_ptr. However, I don't know how to use it in this situation. CvMemStorage *storage = cvCreateMemStorage(); ... use the pointer ... cvReleaseMemStorage(&storage); I'm not sure, but I think that the storage variable is just a malloc'ed memory, not a C++ class object. Is there a way to use the smart pointers for the storage variable? Thank you.

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  • Java CountDownLatch used to wait for JFrame to dispose

    - by Brian
    I have referenced this previous question as well as other sources, but cannot get CountDownLatch to work correctly. Background: mainFrame creates new Frame called dataEntryFrame. When dataEntryFrame "Submit" button is clicked, record added to database and dataEntryFrame disposed. At this point, mainFrame should clear and reload a jList that shows all records. Issue: When dataEntryFrame loads, java freezes, dataEntryFrame components never load. I cannot get past this part... then, in the DataEntryFrame, CountDownLatch should only decrements after the submit button is clicked, successfully adds a record to a database table, and disposes itself. Or when the user clicks cancel... Code: From MainFrame CountDownLatch dataEntryDone = new CountDownLatch(1); DataEntryFrame f = new DataEntryFrame(dataEntryDone); Thread newThread = new Thread(f); newThread.start(); dataEntryDone.await(); Code: From DataEntryFrame public void run(){ initComponents(); loadOtherData(); this.setVisible(true); } void submit(){ addRecord(); this.dispose() dataEntryDone.countDown(); }

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  • Fabric "TypeError: not all arguments converted during string formatting"

    - by Brian Carpio
    I have the following fabric task: @task def deploy_west_ec2_ami(name, puppetClass, size='m1.small', region='us-west-1', basedn='joe', ldap='arch-ldap-01', secret='secret', subnet='subnet-d43b8ab d', sgroup='sg-926578fe'): execute(deploy_ec2_ami, name='%s',puppetClass='%s',size='%s',region='%s',basedn='%s',ldap='%s',secret='%s',subnet='%s',sgroup='%s' %(name, puppetClass , size, region, basedn, ldap, secret, subnet, sgroup)) However when I run the command: fab deploy_west_ec2_ami:test,java I get the following Traceback: Traceback (most recent call last): File "/usr/local/lib/python2.6/dist-packages/fabric/main.py", line 710, in main *args, **kwargs File "/usr/local/lib/python2.6/dist-packages/fabric/tasks.py", line 321, in execute results['<local-only>'] = task.run(*args, **new_kwargs) File "/usr/local/lib/python2.6/dist-packages/fabric/tasks.py", line 113, in run return self.wrapped(*args, **kwargs) File "/home/bcarpio/Projects/githubenterprise/awsdeploy/fabfile.py", line 35, in deploy_west_ec2_ami execute(deploy_ec2_ami, name='%s',puppetClass='%s',size='%s',region='%s',basedn='%s',ldap='%s',secret='%s',subnet='%s',sgroup='%s' %(name, puppetClass, size, region, basedn, ldap, secret, subnet, sgroup)) TypeError: not all arguments converted during string formatting I am not sure I understand why. I am pretty sure I have all the values defined here just fine. Also when I run the execute task deploy_ec2_ami as so: deploy_ec2_ami:test,java,m1.small,us-west-1,'dc\=test\,dc\=net',ldap-01,secret,subnet-d43b8abd,sg-926578fe It works just fine

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  • copy an element as HTML to clipboard

    - by Brian Scott
    I've managed to write some jQuery to find an element and copy it's html to the clipboard (ie only). The problem is that when I paste this into a rich text box area in sharepoint it pastes the HTML as text only. How do i replicate the user action of highlighting a link on a page and pressing copy. When I do this manually and then paste the clipboard contents the rich text area realises that it is markup and replicates the link as an anchor in the text content.

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  • Creating Emulated iSCSI Target in a Lab/Testing Environment using Windows Server 2008 R2

    - by Brian McCleary
    We have a single server running Windows Server 2008 with Hyper-V installed running 5 virtual machines. I have purchased a second DELL R805 Server so that we can create a fail-over cluster to our current R805 that is currently in production. Right now, our R805 connects via iSCSI to a MD3000i iSCSI SAN. Before we try to roll out the second server and clustering to our production environment, I want to be able to test and "play with" the clustering features in our lab before rolling it out. The problem is that I don't want to spend a couple thousand dollars on another iSCSI SAN server just for testing. I already have two servers in my lab that are installed with Windows Server 2008 R2 64bit (one is the R805 and another spare desktop that was laying around) and with the Hyper-V roll enabled that should be ready to test with, but I don't have an iSCSI target to use as the Cluster Shared Volume. Is there anyway to install, either on a Hyper-V image or on a external spare computer that we have some sort of emulated iSCSI target? In our lab, we obviously don't need a real SAN, just something that we can test out how to setup the clustering properly outside of our production environment. Any advise is appreciated. FYI - I have read Jose Barret's blog on WUDSS at http://blogs.technet.com/josebda/archive/2008/01/07/installing-the-evaluation-version-of-wudss-2003-refresh-and-the-microsoft-iscsi-software-target-version-3-1-on-a-vm.aspx, but it seems awfully complex. I'm hoping for an easier solution.

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  • Rails functional testing without migrations

    - by Brian D.
    The name pretty much says it all. Does anyone know how to accomplish functional testing when you are not using migrations in Rails? I'd be open to any advice or third party libraries (if there are any). I thought of creating my own plugin to address this but it seems like a pretty big task and would rather not do this unless necessary. Thanks in advance.

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  • Ruby get inheriting class

    - by Brian D.
    I'm working on creating my first plugin for rails. I'm still pretty new to ruby and I was wondering if its possible to get the inheriting class? For example, I'm trying to create a plugin that will allow unit testing and functional testing when you are not using migrations. What I'm trying to do is initialize a class variable named controller to be initialized to the type of controller that is being tested. If I have a base class ControllerTest: class ControllerTest < Test::Unit::TestCase attr_accessor :controller def initialize super @controller = "call function that will find the inheriting classes name and create an instance of that controller type." end end So what I'm currently stuck on is getting the name of the inheriting class. Is this possible? And if not, does anyone know another way on how I could go about implementing this? Thanks in advance.

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  • Gridview delete/edit not working when using select parameter

    - by Brian Carroll
    new to ASP.NET. I created a sqldatasource and set up basic select query (SELECT * FROM Accounts) using the wizard. I then had the sqldatasource wizard create the INSERT, EDIT and DELETE queries. Connected this datasource to a gridview with EDITING and DELETING enabled. Everything works fine. The SELECT query returns all records and I can edit/delete them. Now I need to send a parameter to the SELECT command to filter the records to those with the user's id (pulled from Membership.GetUser). When I add this parameter, the SELECT command works fine, but the EDIT/DELETE buttons in the gridview no longer work. No error is generated. The page refreshes but the records were not updated in the database. I don't understand what is wrong. CODE: <% Dim u As MembershipUser Dim userid As String u = Membership.GetUser(User.Identity.Name) userid = u.ProviderUserKey.ToString SqlDataSource1.SelectParameters("UserId").DefaultValue = userid %> <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="ID" DataSourceID="SqlDataSource1"> <Columns> <asp:CommandField ShowDeleteButton="True" ShowEditButton="True" /> <asp:BoundField DataField="ID" HeaderText="ID" InsertVisible="False" ReadOnly="True" SortExpression="ID" /> <asp:BoundField DataField="UserId" HeaderText="UserId" SortExpression="UserId" /> <asp:BoundField DataField="AccountName" HeaderText="AccountName" SortExpression="AccountName" /> <asp:BoundField DataField="DateAdded" HeaderText="DateAdded" SortExpression="DateAdded" /> <asp:BoundField DataField="LastModified" HeaderText="LastModified" SortExpression="LastModified" /> </Columns> </asp:GridView> <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:CheckingConnectionString %>" DeleteCommand="DELETE FROM [Accounts] WHERE [ID] = @ID" InsertCommand="INSERT INTO [Accounts] ([UserId], [AccountName], [DateAdded], [LastModified]) VALUES (@UserId, @AccountName, @DateAdded, @LastModified)" SelectCommand="SELECT * FROM [Accounts] WHERE [UserId] = @UserId" UpdateCommand="UPDATE [Accounts] SET [UserId] = @UserId, [AccountName] = @AccountName, [DateAdded] = @DateAdded, [LastModified] = @LastModified WHERE [ID] = @ID"> <DeleteParameters> <asp:Parameter Name="ID" Type="Int32" /> </DeleteParameters> <InsertParameters> <asp:Parameter Name="UserId" Type="String" /> <asp:Parameter Name="AccountName" Type="String" /> <asp:Parameter Name="DateAdded" Type="DateTime" /> <asp:Parameter Name="LastModified" Type="DateTime" /> </InsertParameters> <UpdateParameters> <asp:Parameter Name="UserId" Type="String" /> <asp:Parameter Name="AccountName" Type="String" /> <asp:Parameter Name="DateAdded" Type="DateTime" /> <asp:Parameter Name="LastModified" Type="DateTime" /> <asp:Parameter Name="ID" Type="Int32" /> </UpdateParameters> <SelectParameters> <asp:Parameter Name="UserId"/> </SelectParameters> </asp:SqlDataSource>

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  • C++ Win32 API equivalent of CultureInfo.TwoLetterISOLanguageName

    - by Brian Gillespie
    The .NET framework makes it easy to get information about various locales; the Win32 C++ APIs are a bit harder to figure out. Is there an equivalent function in Win32 to get the two-letter ISO language name given an integer locale ID? In C# I'd do: System.Globalization.CultureInfo ci = new System.Globalization.CultureInfo(1034); string iso = ci.TwoLetterISOLanguageName; // iso == "es" now.

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  • Can I do the following with the Twitter API?

    - by Brian Scott
    Hi, I'm looking to do the 2 following tasks automatically via the twitter API? Allow a user to provide their credentials and have their twitter account to subscribe to my website feed directly from a form on the site. Allow a user to integrate tweets from my websites twitter feed into their outgoing tweets. I'm finding it hard to find any informationon how to achieve these, can anyone shed any light? Thanks in advance.

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  • Java Compiler - Load Method

    - by Brian
    So I have been working on a java project where the goal is to create a virtual computer. So I am basically done but with one problem. I have created a compiler which translates a txt document with assembly code in it and my compiler has created a new-file with this code written as machine executable ints. But now I need to write a load method that reads these ints and runs the program but I am having difficulty doing this. Any help is much appreciated....also this is not homework if you are thinking this. The project was simply to make a compiler and now I am trying to complete it for my own interest. Thanks. Here is what I have so far for load: public void load(String filename) { FileInputStream fs = new FileInputStream(filename); DataInputStream dos = new DataInputStream(fs); dos.readInt();

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  • JavaScript "confirm" on SelectedIndexChange of RadioButtonList

    - by Brian David Berman
    I have a RadioButtonList control and I would like to do a Javascript "confirm" when a user tries to change the index. Currently AutoPostBack is set to TRUE. I can, of course, just call __doPostBack from within a javascript function, etc. I tried a few things with jQuery but you have to worry about mousedown vs. click and then there is always the fact that you can click the checkbox label to select it, etc. Anyone have a nice solution for this? To be clear, I am looking for a way to prompt the user with a confirm box prior to their selection being made and triggering a postback.

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  • Minimizing SQL queries using join with one-to-many relationship

    - by Brian
    So let me preface this by saying that I'm not an SQL wizard by any means. What I want to do is simple as a concept, but has presented me with a small challenge when trying to minimize the amount of database queries I'm performing. Let's say I have a table of departments. Within each department is a list of employees. What is the most efficient way of listing all the departments and which employees are in each department. So for example if I have a department table with: id name 1 sales 2 marketing And a people table with: id department_id name 1 1 Tom 2 1 Bill 3 2 Jessica 4 1 Rachel 5 2 John What is the best way list all departments and all employees for each department like so: Sales Tom Bill Rachel Marketing Jessica John Pretend both tables are actually massive. (I want to avoid getting a list of departments, and then looping through the result and doing an individual query for each department). Think similarly of selecting the statuses/comments in a Facebook-like system, when statuses and comments are stored in separate tables.

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  • What does Rails script/server -d do differently that would cause a cells template to not be found

    - by Brian Deterling
    I'm using cells. I used the generator to create a cell so the path to my template was automatically chosen to be app/cells/displayer/table.html.erb where displayer is the name of the cell and table is the name of the state. When I run script/server in the foreground, everything works perfectly. But when I run script/server -d, I get "Missing template displayer/table.erb in view path app/cells:app/cells/layouts". Even if I change table.html.erb to table.erb, I see the same message - the ActionView code is checking both but not finding either. Even if you're not familiar with cells, does anyone know what happens differently in daemon mode related to view paths? In this case, it appears that the plugin is not correctly registering the view path.

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  • DocuSign Connect xsd [on hold]

    - by Brian
    I'm trying to parse xml inbound to our system from the DocuSign Connect service (which publishes status updates to a given web service). I typiclly use jaxb to process xml but as far as I know I need xsd's in order to generate the jaxb. I don't have (or can't find) xsd's from DocuSign in order to do this. I could use other java classes/libraries to parse the xml but without xsd's I'd have to guess at types, restrictions and formats. Is there a way to generate jaxb without having xsd's?

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  • How to determine values saved on the stack?

    - by Brian
    I'm doing some experimenting and would like to be able to see what is saved on the stack during a system call (the saved state of the user land process). According to http://lxr.linux.no/#linux+v2.6.30.1/arch/x86/kernel/entry_32.S it shows that the various values of registers are saved at those particular offsets to the stack pointer. Here is the code I have been trying to use to examine what is saved on the stack (this is in a custom system call I have created): asm("movl 0x1C(%esp), %ecx"); asm("movl %%ecx, %0" : "=r" (value)); where value is an unsigned long. As of right now, this value is not what is expected (it is showing a 0 is saved for the user value of ds). Am I correctly accessing the offset of the stack pointer? Another possibility might be could I use a debugger such as GDB to examine the stack contents while in the kernel? I don't have much extensive use with debugging and am not sure of how to debug code inside the kernel. Any help is much appreciated.

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  • Ruby on Rails - f.error_messages not showing up

    - by Brian Roisentul
    Hi, I've read many posts about this issue but I never got this to work. My model looks like this: class Announcement < ActiveRecord::Base validates_presence_of :title, :description end My controller's create method(only its relevant part) looks like this: def create respond_to do |format| if @announcement.save flash[:notice] = 'Announcement was successfully created.' format.html { redirect_to(@announcement) } format.xml { render :xml => @announcement, :status => :created, :location => @announcement } else @announcement = Announcement.new @provinces = Province.all @types = AnnouncementType.all @categories = Tag.find_by_sql 'select * from tags where parent_id=0 order by name asc' @subcategories= '' format.html { render :action => "new" } #new_announcement_path format.xml { render :xml => @announcement.errors, :status => :unprocessable_entity } end end end My form looks like this: <% form_for(@announcement) do |f| %> <%= error_messages_for 'announcement' %> <!--I've also treid f.error_messages--> ... What am I doing wrong?

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  • Rails Asset Caching Breaks First few page loads

    - by Brian Armstrong
    We're using Rails asset caching for JS and CSS like this: <%= javascript_include_tag :defaults, 'autocomplete', 'searchbox', 'jqmodal', :cache => set_asset_cache(:admins) %> In our deploy we call rake tmp:assets:clear each time. The problem is that the first few page loads after a deploy come up with no css on the page. I guess until the cached all.js and all.css have been regenerated. We deploy many times per day and this is scary for any users who happen to come across a busted page. Have people found any way to make this smoother so the new cached assets are guaranteed to be there on the first new page load?

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  • How to design a C / C++ library to be usable in many client languages?

    - by Brian Schimmel
    I'm planning to code a library that should be usable by a large number of people in on a wide spectrum of platforms. What do I have to consider to design it right? To make this questions more specific, there are four "subquestions" at the end. Choice of language Considering all the known requirements and details, I concluded that a library written in C or C++ was the way to go. I think the primary usage of my library will be in programs written in C, C++ and Java SE, but I can also think of reasons to use it from Java ME, PHP, .NET, Objective C, Python, Ruby, bash scrips, etc... Maybe I cannot target all of them, but if it's possible, I'll do it. Requirements It would be to much to describe the full purpose of my library here, but there are some aspects that might be important to this question: The library itself will start out small, but definitely will grow to enormous complexity, so it is not an option to maintain several versions in parallel. Most of the complexity will be hidden inside the library, though The library will construct an object graph that is used heavily inside. Some clients of the library will only be interested in specific attributes of specific objects, while other clients must traverse the object graph in some way Clients may change the objects, and the library must be notified thereof The library may change the objects, and the client must be notified thereof, if it already has a handle to that object The library must be multi-threaded, because it will maintain network connections to several other hosts While some requests to the library may be handled synchronously, many of them will take too long and must be processed in the background, and notify the client on success (or failure) Of course, answers are welcome no matter if they address my specific requirements, or if they answer the question in a general way that matters to a wider audience! My assumptions, so far So here are some of my assumptions and conclusions, which I gathered in the past months: Internally I can use whatever I want, e.g. C++ with operator overloading, multiple inheritance, template meta programming... as long as there is a portable compiler which handles it (think of gcc / g++) But my interface has to be a clean C interface that does not involve name mangling Also, I think my interface should only consist of functions, with basic/primitive data types (and maybe pointers) passed as parameters and return values If I use pointers, I think I should only use them to pass them back to the library, not to operate directly on the referenced memory For usage in a C++ application, I might also offer an object oriented interface (Which is also prone to name mangling, so the App must either use the same compiler, or include the library in source form) Is this also true for usage in C# ? For usage in Java SE / Java EE, the Java native interface (JNI) applies. I have some basic knowledge about it, but I should definitely double check it. Not all client languages handle multithreading well, so there should be a single thread talking to the client For usage on Java ME, there is no such thing as JNI, but I might go with Nested VM For usage in Bash scripts, there must be an executable with a command line interface For the other client languages, I have no idea For most client languages, it would be nice to have kind of an adapter interface written in that language. I think there are tools to automatically generate this for Java and some others For object oriented languages, it might be possible to create an object oriented adapter which hides the fact that the interface to the library is function based - but I don't know if its worth the effort Possible subquestions is this possible with manageable effort, or is it just too much portability? are there any good books / websites about this kind of design criteria? are any of my assumptions wrong? which open source libraries are worth studying to learn from their design / interface / souce? meta: This question is rather long, do you see any way to split it into several smaller ones? (If you reply to this, do it as a comment, not as an answer)

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  • How can one make a web-site accessible only when someone has a dongle?

    - by Brian M. Hunt
    Suppose you want to add an extra layer of credentials on top of a SSL-encrypted login/password, but you don't want to increase complexity to the user. Is there a way to add the requirement of the possession of a dongle to web-server authentication schemes with existing cross-platform browser capabilities? In other words, to get access to the web-site, you would need a username, password, and a USB dongle that has been plugged into the client computer. The dongle would presumably do some sort of challenge/response. It'd be ideal if this dongle solution worked with Firefox automatically or with the simple addition of a plugin. Thoughts and suggestions are appreciated.

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  • Use string value to create new instance

    - by Brian David Berman
    I have a few classes: SomeClass1, SomeClass2. How can I create a new instance of one of these classes by using the class name from a string? Normally, I would do: var someClass1 = new SomeClass1(); How can I create this instance from the following: var className = "SomeClass1"; I am assuming I should use Type.GetType() or something but I can't figure it out. Thanks.

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