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  • Ruby 1.9.2 and ruby-debug19 "undefined symbol: ruby_current_thread "

    - by Chris McCauley
    Hi, I'm getting the following error while trying to require 'ruby-debug' /home/chris/.rvm/gems/ruby-1.9.2-preview1/gems/ruby-debug-base19-0.11.23/lib/ruby_debug.so: /home/chris/.rvm/gems/ruby-1.9.2-preview1/gems/ruby-debug-base19-0.11.23/lib/ruby_debug.so: undefined symbol: ruby_current_thread - /home/chris/.rvm/gems/ruby-1.9.2-preview1/gems/ruby-debug-base19-0.11.23/lib/ruby_debug.so (LoadError) from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:36:in `require' from /home/chris/.rvm/gems/ruby-1.9.2-preview1/gems/ruby-debug-base19-0.11.23/lib/ruby-debug-base.rb:1 from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require' from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' from /home/chris/.rvm/gems/ruby-1.9.2-preview1/gems/ruby-debug19-0.11.6/cli/ruby-debug.rb:5 from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require' from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:36:in `require' from ./bin/debug:5 I'm using ruby 1.9.2dev (2009-07-18 trunk 24186) [i686-linux] via rvm and the ruby-debug19 gem installed ok. Any ideas? Thanks Chris

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  • Vim: how to undo a regex with a new regex?

    - by Victor Tihomirov
    my I have here a text that has been encrypted in Vi this way: 1,$s/\(.\)\1/&&/g 1,$s/\(.\)\(.\)\2\2\2/\2\2\2\1\2/g 1,$s/\(.\)\(.\)\(.\)\(.\)/\3\1\4\2/g 1,$s/\(...\)\(...\)/\2\1/g The task is to write a new regex for each regex in order to undo the the changes, so-called decrypting of the text. I figured out how to undo the last 2 changes: :1,$s/\(...\)\(...\)/\2\1/g :1,$s/\(.\)\(.\)\(.\)\(.\)/\2\4\1\3/g I'd like you to explain me what do the first two regex do. What does \1 or \2\2\2 mean before the forward slash? I assume that after the slash they change place (but wouldn't it be enough to just write \2\1 instead of \2\2\2\1\2(what does it mean?)? I just don't get it). And what does & or && mean? Thank you

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  • Device Driver IRQL and Thread/Context Switches

    - by Christian Hoglund
    Hi, I'm new to Windows device driver programming. I know that certain operations can only be performed at IRQL PASSIVE_LEVEL. For example, Microsoft have this sample code of how to write to a file from a kernel driver: if (KeGetCurrentIrql() != PASSIVE_LEVEL) return STATUS_INVALID_DEVICE_STATE; Status = ZwCreateFile(...); My question is this: What is preventing the IRQL from being raised after the KeGetCurrentIrql() check above? Say a context or thread swithch occurs, couldn't the IRQL suddenly be DISPATCH_LEVEL when it gets back to my driver which would then result in a system crash? If this is NOT possible then why not just check the IRQL in the DriverEntry function and be done with it once for all?

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  • Should I learn C?

    - by Justin Standard
    Original Question: Should I Learn C? In the theme of the stackoverflow podcast, here's a fun question: should I learn C? I expect Jeff & Joel will have something to say on this. Some info on my background: Primarily a Java programmer on "enterprisy" systems. Favorite languages: python, scheme 7 years programming experience A very small amount of C++ experience, practically no C experience No immediate "need" to learn C So should I learn C? If so, why? If not, why? C or Assembly? Lots of folks recomending Assembler, so add on question: Is it better to learn C or Assembler? If Assembler, which one? Recommended assemblers so far: Motorolla 68000 Intel Assembler (does he mean x86?) MASM32

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  • Where to use Controller.HttpContext

    - by Ben
    Hi, In my base controller's constructor I am calling an extension method that checks for specific cookies on the client. Currently I am using System.Web.HttpContext.Current to get the current context. However, I am lead to believe that I should be using Controller.HttpContext since it is more testable and contains additional information about the request. However, Controller.HttpContext returns null on creation (believe this is by design) but also on Initialize and Execute methods (unless I use Routing.RequestContext.HttpContext?). So if I should be using Controller.HttpContext instead of HttpContext.Current, at what point is it available to me in a request? Thanks Ben

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  • OutOfMemoryException - out of ideas II

    - by Captain Comic
    Hello, This question is related to my previous question. The storyline: I have an application which consumes a lot of memory if you look at task manager VMSize. I am trying to find out what consumes this amount of memory. You see in the picture below that VM size is 2,46 GB Ok now I am looking at .net performance counters Committed and reserved bytes add up to only 1,2 GB Now lets look at windb sos debugging. Let's run eeheap -gc command The heap size used by GC is only 340 MB. Where is the rest of used memory? I need to discover why WM size in TaskManager is 2.4 GB

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  • Where does Internet Explorer store saved passwords?

    - by Ian Boyd
    Where does Internet Explorer store saved passwords? And since this is a programming site, i'm not literally asking for the location where IE stores passwords, but which API ie uses to save passwords. At first i assumed that Microsoft was using the standard api: CredRead CredWrite which is used to save domain and generic program/web-site credentials. CredRead/CredWrite turn around and use CryptProtectData CryptUnprotectData to encrypt data with the current user's account. CredRead/CredWrite then store the data in some magical location, which contents you can see from the control panel: But i don't see IE passwords in there. So ie doesn't store passwords using CredRead/CredWrite. What api does IE use to store passwords, and if it uses CryptProtectData, where does it then store the protected data?

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  • How to draw a 3D donut chart in OpenGL?

    - by paulbeesley
    I would like to draw a chart in OpenGL similar to the donut graph at the bottom-right of this example. I have experience with drawing 2D charts such as the main chart in the example but what confuses me about the one I want to draw is the correct type of primitive to use when drawing the 3D chart. I have considered using GL_QUAD_STRIP and GL_POLYGON but neither seem quite right for the task. Where should I begin? I will be using JOGL with Java to draw the chart, if that helps at all. Also, I don't necessarily need to extrude certain slices of the chart as shown in the example.

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  • Best practice for Python & Django constants

    - by Dylan Klomparens
    I have a Django model that relies on a tuple. I'm wondering what the best practice is for refering to constants within that tuple for my Django program. Here, for example, I'd like to specify "default=0" as something that is more readable and does not require commenting. Any suggestions? Status = ( (-1, 'Cancelled'), (0, 'Requires attention'), (1, 'Work in progress'), (2, 'Complete'), ) class Task(models.Model): status = models.IntegerField(choices=Status, default=0) # Status is 'Requires attention' (0) by default. EDIT: If possible I'd like to avoid using a number altogether. Somehow using the string 'Requires attention' instead would be more readable.

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  • Android: Saving custom button and spinner on orientation change

    - by Jacob Huggart
    Hello All, I am new to Android programming and was handed a fairly large program that is almost complete, but needed support for switching between portrait and landscape view. I added android:configChanges="keyboardHidden|orientation" to the manifest and used onConfigurationChanged to save the view data and that works. However, there is a button that displays the date selected (when pressed a calendar to select the date comes up) and a spinner that displays the current view and is used to select a new view. Those two items are being cleared/reset and do not work at all after the screen flip. I have been attempting to use onSaveInstanceState and onRestoreInstanceState to fix that, but I cannot figure out how to get it to work. Any advice? FYI, This is how my spinner is set up: Spinner s = (Spinner) findViewById(R.id.siteSelector); ArrayAdapter<?> adapter = ArrayAdapter.createFromResource( this, R.array.sites, android.R.layout.simple_spinner_item); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); s.setAdapter(adapter);

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  • UIScrollView subviews not showing at first

    - by igul222
    I created a custom UIScrollView subclass that works a like a UITableView, keeping a collection of subviews and re-using them whenever the user scrolls. It's implemented like this: -(void)layoutSubviews { for(UIView *subview in [self subviews]) [subview removeFromSuperview]; // then re-add subviews after changing the frame and some attributes } This works fine with simple UIViews, but when I try to do it with a UIView that has a UILabel subview, the "base" view appears fine, but the UILabel doesn't show up at all. I can get the UILabel to show up by scrolling the entire UIView off screen and then bringing it back on. What could be causing this? So far, I've tried calling [myUIView setNeedsLayout], [myUIView setNeedsDisplay], and [myUIView layoutIfNeeded] from various places. None of them worked, and the last one crashed my app. I've also done the same thing to myUIScrollViewSubclass, with similar results.

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  • php html flash website design tools for beginner

    - by LikeToCode
    I have 5 years of C#, Perl and SQL programming experience but I've just found a web designer and developer job. I dont know anything about it but need to design a website using PHP, flash and HTML, whatever it is. Can you give me pointers on where to start to learn it all ASAP and start designing the website? I downloaded WAMP and learned to configure it. Other then that I dont know what to do next. They gave me a few pictures to incorporate, but I dont know how :)

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  • SSIS how to set connection string dynamically from a config file

    - by swapna
    Hi, I am using sql server integration services(SSIS) in sql server business intelligent devolopment studio. I need to do a task --that is. I have to read from a source database and put it into a destination flat file.But the same time the source databse should be configurable. That means in the Oledbconnection manager connection string should change dynamically.this connection string should be taking from a configuration/xml/flat file. I read that i can use varaibles and expressions to change the connection string dynamically.But how do i read connection string value from a config/xml/flat file and set the variable? This part i am unable to do.Or is this the right way to achieve this.. Can we add web.config files to ssis project.? I am new to SSIs. Please provide some help with examles etc. and this is quiet urgent for me. Thanks SNA.

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  • Client-Side script to upload attachments to the Sharepoint 2007 list

    - by Clone of Anton Makrushin
    Hello. I have no good script-writing experience. So, I have a list created on MOSS 2007 with about 1000 elements and attachments enabled. I need to attach to each list item file (*.jpg) from a local folder. I doesn't have administrator privileges at MOSS server, only contributor rights Here is my script: $web = new-Object system.Net.WebClient $web.Credentials = [System.Net.CredentialCache]::DefaultCredentials $web.Headers.Add("user-agent", "PowerShell Script") $web.UploadFile('http://ruglbsrvsps/IT/Lists/Test1/', 'C:\temp\Attachments\14\Img1.jpg' ) Test1 - target list; Item1, Item2, Item3 - list items, without attachments, created manually When I run script, it returns byte array and does not upload file to the list item. Can you fix my script or advice better solution for my task (attach bulk of files to the MOSS list items, only contributor rights for target Sharepoint 2007 list) Thank you.

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  • C# - Launch Invisible Process (CreateNoWindow & WindowStyle not working?)

    - by Chad
    I have 2 programs (.exe) which I've created in .NET. We'll call them the Master and the Worker. The Master starts 1 or more Workers. The Worker will not be interacted with by the user, but it is a WinForms app that receives commands and runs WinForms components based on the commands it receives from the Master. I want the Worker app to run completely hidden (except showing up in the Task Manager of course). I thought that I could accomplish this with the StartInfo.CreateNoWindow and StartInfo.WindowStyle properties, but I still see the Client.exe window and components in the form. However, it doesn't show up in the taskbar. Process process = new Process { EnableRaisingEvents = true, StartInfo = { CreateNoWindow = true, WindowStyle = ProcessWindowStyle.Hidden FileName = "Client.exe", UseShellExecute = false, ErrorDialog = false, } }; What do I need to do to let Client.exe run, but not show up?

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  • JAX-WS MarshalException with custom JAX-B bindings: Unable to marshal type "java.lang.String" as an

    - by MoneyMark
    I seem to be having an issue with Jax-WS and Jax-b playing nicely together. I need to consume a web-service, which has a predefined WSDL. When executing the generated client I am receiving the following error: javax.xml.ws.WebServiceException: javax.xml.bind.MarshalException - with linked exception: [com.sun.istack.SAXException2: unable to marshal type "java.lang.String" as an element because it is missing an @XmlRootElement annotation] This started occurring when I used an external custom binding file to map needlessly complex types to java.lang.string. Here is an excerpt from my binding file: <?xml version="1.0" encoding="UTF-8"?> <bindings xmlns="http://java.sun.com/xml/ns/jaxb" version="2.0" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:xjc="http://java.sun.com/xml/ns/jaxb/xjc"> <bindings schemaLocation="http://localhost:7777/GESOR/services/RegistryUpdatePort?wsdl#types?schema1" node="/xs:schema"> <bindings node="//xs:element[@name='StwrdCompany']//xs:complexType//xs:sequence//xs:element[@name='company_name']"> <property> <baseType name="java.lang.String" /> </property> </bindings> <bindings node="//xs:element[@name='StwrdCompany']//xs:complexType//xs:sequence//xs:element[@name='address1']"> <property> <baseType name="java.lang.String" /> </property> </bindings> <bindings node="//xs:element[@name='StwrdCompany']//xs:complexType//xs:sequence//xs:element[@name='address2']"> <property> <baseType name="java.lang.String" /> </property> </bindings> ...more fields </bindings> </bindings> When executing wsimport against the provided WSDL, StwrdCompany is generated with the following variables declared: @XmlRootElement(name = "StwrdCompany") public class StwrdCompany { @XmlElementRef(name = "company_name", type = JAXBElement.class) protected String companyName; @XmlElementRef(name = "address1", type = JAXBElement.class) protected String address1; @XmlElementRef(name = "address2", type = JAXBElement.class) ... more fields ... getters/setters @XmlAccessorType(XmlAccessType.FIELD) @XmlType(name = "", propOrder = { "value" }) public static class CompanyName { @XmlValue protected String value; @XmlAttribute protected Boolean updateToNULL; /** * Gets the value of the value property. * * @return * possible object is * {@link String } * */ public String getValue() { return value; } /** * Sets the value of the value property. * * @param value * allowed object is * {@link String } * */ public void setValue(String value) { this.value = value; } /** * Gets the value of the updateToNULL property. * * @return * possible object is * {@link Boolean } * */ public boolean isUpdateToNULL() { if (updateToNULL == null) { return false; } else { return updateToNULL; } } /** * Sets the value of the updateToNULL property. * * @param value * allowed object is * {@link Boolean } * */ public void setUpdateToNULL(Boolean value) { this.updateToNULL = value; } ... more inner classes } } Finally, here is the associated snippet from the WSDL that seems to be causing such grief. <xs:element name="StwrdCompany"> <xs:complexType> <xs:sequence> <xs:element maxOccurs="1" minOccurs="0" name="company_name" nillable="true"> <xs:complexType> <xs:simpleContent> <xs:extension base="xs:string"> <xs:attribute default="false" name="updateToNULL" type="xs:boolean"/> </xs:extension> </xs:simpleContent> </xs:complexType> </xs:element> <xs:element maxOccurs="1" minOccurs="0" name="address1" nillable="true"> <xs:complexType> <xs:simpleContent> <xs:extension base="xs:string"> <xs:attribute default="false" name="updateToNULL" type="xs:boolean"/> </xs:extension> </xs:simpleContent> </xs:complexType> </xs:element> ... more fields in the same format <xs:element maxOccurs="1" minOccurs="0" name="p_source_timestamp" nillable="false" type="xs:string"/> </xs:sequence> <xs:attribute name="company_xid" type="xs:string"/> </xs:complexType> </xs:element> The reason for the custom binding is so I can map user input from a pojo into the StwrdCompany object more easily, whether it be direct instantiation or through the use of Dozer for bean mapping. I was unable to successfully map between the objects without the custom binding. Finally, one other thing I tried was setting a globalBinding definition: <globalBindings generateValueClass="false"></globalBindings> This caused the server to through an argument mismatch exception since the Soap Message was using xs:string xml types instead of passing the defined complex types, so I abandoned that idea. Any insight into what is causing the MarshalException or how to go about solving the issue of calling the webservice and mapping these objects more easily, is greatly appreciated. I've been searching for days and I sadly think I am stumped.

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  • ASP.NET C# Write RSS feed for Froogle

    - by Peter
    Hi, I'm trying to create a RSS 2.0 feed in ASP.NET C# with products to provide to Froogle. The RSS feed should look like: http://www.google.com/support/merchants/bin/answer.py?answer=160589&hl=en I'm using the SyndicationFeed and SyndicationsItems to create the feed. But I'm having trouble adding the extra elements like g:image_link. I try the extra elements like; syndicationItem.ElementExtensions.Add(new XElement("image_link", product.ImageLink).CreateReader()); This works, but how can I add the namespace xmlns:g="http://base.google.com/ns/1.0" to the first RSS tag and use this for the extension elements? Thank you

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  • Error in using Hadoop MapReduce in Eclipse

    - by Shweta
    When I executed a MapReduce program in Eclipse using Hadoop, I got the below error. It has to be some change in path, but I'm not able to figure it out. Any idea? 16:35:39 INFO mapred.JobClient: Task Id : attempt_201001151609_0001_m_000006_0, Status : FAILED java.io.FileNotFoundException: File C:/tmp/hadoop-Shwe/mapred/local/taskTracker/jobcache/job_201001151609_0001/attempt_201001151609_0001_m_000006_0/work/tmp does not exist. at org.apache.hadoop.fs.RawLocalFileSystem.getFileStatus(RawLocalFileSystem.java:361) at org.apache.hadoop.fs.FilterFileSystem.getFileStatus(FilterFileSystem.java:245) at org.apache.hadoop.mapred.TaskRunner.setupWorkDir(TaskRunner.java:519) at org.apache.hadoop.mapred.Child.main(Child.java:155)

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  • Are you as productive in Javascript as you are in .Net or Java?

    - by bglenn
    I code primarily in javascript and in vb.net. I've found that if I can achieve the same thing in both javascript and vb.net that I feel far more productive and expressive using javascript for the task. I often find myself researching server-side javascript implementations to see if anything has gone mainstream so that I can code my back-end business logic and data access in javascript. Given all the advanced tooling and language features in .Net this preference seems somewhat paradoxical to me. I'm not suggesting one is better than the other (I've been a vb programmer since I started programming), I'm just wondering if my preference is entirely subjective or if anyone else shares it. So, does anyone else enjoy coding in javascript to the point where you prefer it to the .Net and Java environment, and if, so why?

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  • Code golf: find all anagrams

    - by Charles Ma
    An word is an anagram if the letters in that word can be re-arranged to form a different word. Task: Find all sets of anagrams given a word list Input: a list of words from stdin with each word separated by a new line e.g. A A's AOL AOL's Aachen Aachen's Aaliyah Aaliyah's Aaron Aaron's Abbas Abbasid Abbasid's Output: All sets of anagrams, with each set separated by a separate line Example run: ./anagram < words marcos caroms macros lump's plum's dewar's wader's postman tampons dent tend macho mocha stoker's stroke's hops posh shop chasity scythia ... I have a 149 char perl solution which I'll post as soon as a few more people post :) Have fun!

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  • When and where to call the RemoveHandler in VB.NET?

    - by marco.ragogna
    I am working to a VB.NET windows forms projet in .NET 1.1. And I have this type of architecture, very simplified. Public MustInherit Class BaseTestLogic Private _TimerPoll As Timer Public Sub New(ByVal sym As SymbolFileMng, ByVal cfg As LampTestConfig, ByVal daas As DaasManager, ByVal mcf As Elux.Wg.Lpd.MCFs.VMCF) AddHandler _TimerPoll.Tick, AddressOf TimerPoll_Tick End Sub End Class Public Class SpecificTestLogic Inherits BaseTestLogic End Class Depending of the type of test I am doing I create an instance of a specific test derived from BaseTestLogic. But I found that after hundreds of object creations I can have StackOverflow exception. I checked my code and saw that I forgot to remove the handler to Timer Tick. The question is, where and when is it correct to remove hadler? Do I need to implement the IDisposable interface in the base class and RemoveHandler in Dispose?

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  • Firefox jQuery Drag and Drop File Upload together with PHP

    - by tonsils
    Hi, Hoping to get some assistance but I am after a jQuery/PHP means of allowing a user to drag and drop files and then via PHP, upload one or more files to a specific directory on a Linux box. I only have Firefox 3.6 as my base browser but can also move to FFox if need be. Cann use any HTML5 features as long as I'm using Firefox 3.6 Can someone possibly point me to any examples/sites where this process is demonstrated? I have had a look at http://www.plupload.com/index.php but this does not work in IE6. As mentioned, would like it to work in FFox only. Thanks.

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  • Visual Studio Crashes when using Crystal Reports Group Editor

    - by Matthew Taylor
    I have a crystal report in my Visual Studio 2008 ASP.NET project, and when I choose "Group Expert" from the Crystal Reports - Report menu, Visual Studio crashes / hangs and I have to use Task Manager to close the program. This happens no matter how many times I try, and oddly enough it seems to work fine on another computer with the same project. Any help at all in the right direction would be greatly appreciated as I am pulling my hair out trying to figure this out. I am using Visual Studio 2008 SP1, SQL Server 2005 Developer SP2, Windows Vista Enterprise SP1, and the version of Crystal Reports that came with the Visual Studio installation.

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  • Documenting applications - automation / semi-automation for screenshots?

    - by bguiz
    For me one of the biggest bores of being a developer is writing user documentation. (I am referring to the stuff that gets exported into PDF files files that ship with the product, not comments in code here). The task off adding or updating new bits of text to the existing documentation is OK. However having to take screenshots of select screens can be quite a tedious process. Is there a way to automate or even semi-automate the process of taking screenshots? The main requirement is the ability to crop images such that they contain only the window, including window manager areas (such as the title bar). The secondary requirement is that any format is OK, so long as it can be exported to PDF. EDIT: Any more biters?

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  • Which coding style is more common?

    - by Babiker
    In no way shape or form am i advertising/promoting my programming style, but as far as 'multiple variable declarations' are concerned, which case is more acceptable professionally and commonly: case 1: private $databaseURL = "localhost" ; private $databaseUName = "root" ; private $databasePWord = "" ; private $databaseName = "AirAlliance"; case 2: private $databaseURL = "localhost"; private $databaseUName = "root"; private $databasePWord = ""; private $databaseName = "AirAlliance"; The reason i like case 1 is because i can skim though it and see that all is correct way faster than case 2. Also i can visually get familiar with variable names witch makes it faster to work with them l latter on the program.

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