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  • How do I copy an object in Java?

    - by Veera
    Consider the below code: DummyBean dum = new DummyBean(); dum.setDummy("foo"); System.out.println(dum.getDummy()); // prints 'foo' DummyBean dumtwo = dum; System.out.println(dumtwo.getDummy()); // prints 'foo' dum.setDummy("bar"); System.out.println(dumtwo.getDummy()); // prints 'bar' but it should print 'foo' So, I want to copy the 'dum' to dumtwo' and I want to change 'dum' without affecting the 'dumtwo'. But the above code is not doing that. When I change something in 'dum', the same change is happening in 'dumtwo' also. I guess, when I say dumtwo = dum, Java copies the reference only. So, is there any way to create a fresh copy of 'dum' and assign it to 'dumtwo' ?

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  • Please help me translate C# code to Ruby

    - by Valentin Vasilyev
    Here is the code: using System; using System.Collections.Generic; using System.Linq; namespace cs2 { class Program { static void Main(string[] args) { var i=Fibs.TakeWhile(x=>x < 1000).Where(x=>x % 2==0).Sum(); } static IEnumerable<long> Fibs() { long a = 0, b = 1; while (true) { yield return b; b += a; a = b - a; } } } }

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  • ubuntu connect to server -> permantely mount?

    - by myforwik
    I have a system with Ubuntu 9.10 installed. I can connect to remote windows shares by using the "connect to server" under "places" menu. I can't figure out where these mount in the file system. And how can I get this to mount automatically on startup? And I can't install smbfs or anything else. I need to use only what comes on the live CD, as there is no internet connection and no way to get in packages.

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  • Remote Desktop from Linux to Computer that Requires Network Level Authentication

    - by Kyle Brandt
    Is there a way to use rdesktop or another Linux client to connect to a server that requires Network Level Authentication? From Windows Server 2008 R2 -- Control Panel -- System And Security -- System -- Allow Remote Access there is an option that says "Allow connections only from computers running Remote Desktop with Network Level Authentication". So with this enabled I can con not connect from Linux. I can connect from XP but you need SP3 and I had to edit a couple of things in the registry for it to work.

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  • For Qt 4.6.x, how to auto-size text to fit in a specified width?

    - by darenchow
    Inside of my QGraphicsRectItem::paint(), I am trying to draw the name of the item within its rect(). However, for each of the different items, they can be of variable width and similarly names can be of variable length. Currently I am starting with a maximum font size, checking if it fits and decrementing it until I find a font size that fits. So far, I haven't been able to find a quick and easy way to do this. Is there a better, or more efficient way to do this? Thanks! void checkFontSize(QPainter *painter, const QString& name) { // check the font size - need a better algorithm... this could take awhile while (painter->fontMetrics().width(name) > rect().width()) { int newsize = painter->font().pointSize() - 1; painter->setFont(QFont(painter->font().family(), newsize)); } }

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  • How to name variables wich are structs

    - by evilpie
    Hello, i often work on private projects using the WinApi, and as you might know, it has thousands of named and typedefed structs like MEMORY_BASIC_INFORMATION. I will stick to this one in my question, what still is preferred, or better when you want to name a variable of this type. Is there some kind of style guide for this case? For example if i need that variable for the VirtualQueryEx function. Some ideas: MEMORY_BASIC_INFORMATION memoryBasicInformation; MEMORY_BASIC_INFORMATION memory_basic_information; Just use the name of the struct non captialized and with or without the underlines. MEMORY_BASIC_INFORMATION basicInformation; MEMORY_BASIC_INFORMATION information; Short form? MEMORY_BASIC_INFORMATION mbi; I often see this style, using the abbreviation of the struct name. MEMORY_BASIC_INFORMATION buffer; VirtualQueryEx defines the third parameter lpBuffer (where you pass the pointer to the struct), so using this name might be an idea, too. Cheers

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  • C# socket blocking behavior

    - by Gearoid Murphy
    My situation is this : I have a C# tcp socket through which I receive structured messages consisting of a 3 byte header and a variable size payload. The tcp data is routed through a network of tunnels and is occasionally susceptible to fragmentation. The solution to this is to perform a blocking read of 3 bytes for the header and a blocking read of N bytes for the variable size payload (the value of N is in the header). The problem I'm experiencing is that occasionally, the blocking receive operation returns a partial packet. That is, it reads a volume of bytes less than the number I explicitly set in the receive call. After some debugging, it appears that the number of bytes it returns is equal to the number of bytes in the Available property of the socket before the receive op. This behavior is contrary to my expectation. If the socket is blocking and I explicitly set the number of bytes to receive, shouldn't the socket block until it recv's those bytes?, any help, pointers, etc would be much appreciated.

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  • C 64-bit Pointer Alignment

    - by DuneBug
    Are pointers on a 64-bit system still 4 byte aligned (similar to a double on a 32 bit system)? Or are they note 8 byte aligned? For example, on a 64-bit system how big is the following data structure: struct a { void* ptr; char myChar; } Would the pointer by 8 byte aligned, causing 7 bytes of padding for the character (total = 8 + 8 = 16)? Or would the pointer be 4 byte aligned (4 bytes + 4 bytes) causing 3 bytes of padding (total = 4 + 4 + 4 = 12)? Thanks, Ryan

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  • Threading multiple WebBrowser in VB .net

    - by Code_Seeker
    I'm building a multiple webbrowser inside tabs( 1 predefine webbrowser control per tab) and I want them all to load at the same time or other words must run in thread. Unfortunately I feel a valid fact came from the error message that this is something not possible. Pls help me to check my simple program code below and its error in case i tried releasing 2 webbrowser controls but when I leave it to single web browser control it works fine. Any workaround? Imports System.Threading Public Class Form1 Dim mythread1 As Thread Dim mythread2 As Thread Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load mythread1 = New Thread(AddressOf mysub1) mythread2 = New Thread(AddressOf mysub2) mythread1.IsBackground = True mythread2.IsBackground = True mythread1.Start() mythread2.Start() End Sub Public Sub mysub1() Dim HTML As String WebBrowser1.Navigate("about:blank") mythread1.Abort() End Sub Public Sub mysub2() WebBrowser2.Navigate("about:blank") mythread2.Abort() End Sub

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  • Intentionally get a "MySQL server has gone away" error

    - by Jonathan
    I'm trying to cope with MySQL's error MySQL server has gone away in a django env. The quick workaround was to set the global wait_timeout MySQL variable to a huge value, but in the long run this would accumulate to many open connections. I figured I'll get the wait_timeout variable and poll the server in smaller intervals. After implementing this I tried to test it but am failing to get the error. I set global wait_timeout=15 and even set global interactive_timeout=15 but the connection refuses to disappear. I'm sure I'm polling the database in larger intervals than 15sec. What could be the cause for not being able to recreate this error?

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  • Java regex replace multiple file paths in a large String

    - by Joe Goble
    So a Regex pro I am not, and I'm looking for a good way to do this. I have a large string which contains a variable number <img> tags. I need to change the path on all of these images to images/. The large string also contains other stuff not just these img's. <img src='http://server.com/stuff1/img1.jpg' /> <img src='http://server.com/stuff2/img2.png' /> Replacing the server name with a ReplaceAll() I could do, it's the variable path in the middle I'm clueless on how to include. It doesn't necessarily need to be a regex, but looping through the entire string just seems wasteful.

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  • How do I check for the existence of an external file with XSL?

    - by LOlliffe
    I've found a lot of examples that reference Java and C for this, but how do I, or can I, check for the existence of an external file with XSL. First, I realize that this is only a snippet, but it's part of a huge stylesheet, so I'm hoping it's enough to show my issue. <!-- Use this template for Received SMSs --> <xsl:template name="ReceivedSMS"> <!-- Set/Declare "SMSname" variable (local, evaluates per instance) --> <xsl:variable name="SMSname"> <xsl:value-of select=" following-sibling::Name"/> </xsl:variable> <fo:table font-family="Arial Unicode MS" font-size="8pt" text-align="start"> <fo:table-column column-width=".75in"/> <fo:table-column column-width="6.75in"/> <fo:table-body> <fo:table-row> <!-- Cell contains "speakers" icon --> <fo:table-cell display-align="after"> <fo:block text-align="start"> <fo:external-graphic src="../images/{$SMSname}.jpg" content-height="0.6in"/> What I'd like to do, is put in an "if" statement, surronding the {$SMSname}.jpg line. That is: <fo:block text-align="start"> <xsl:if test="exists( the external file {$SMSname}.jpg)"> <fo:external-graphic src="../images/{$SMSname}.jpg" content-height="0.6in"/> </xsl:if> <xsl:if test="not(exists( the external file {$SMSname}.jpg))"> <fo:external-graphic src="../images/unknown.jpg" content-height="0.6in"/> </xsl:if> </fo:block> Because of "grouping", etc., I'm using XSLT 2.0. I hope that this is something that can be done. I hope even more that it's something simple. As always, thanks in advance for any help. LO

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  • Can I use AppDomain.AssemblyResolve Event to redirect a failed Assembly Load?

    - by esac
    By default, my application references a mixed mode DLL, so this DLL is both 32 and 64 bit. On a 32 bit system, my app is MSIL and loads the 32 bit DLL. On a 64 bit system, my app loads the 64 bit. However on a 64 bit system, in an older version of the assembly that I am referencing, they only created a 32 bit version. So I fail to load this. I was looking at doing it dynamically, and ideally I would want my MSIL app in 64 bit mode to load the 32 bit DLL. Is this possible? Also it would be nice to resolve it to a different version than what I have referenced as well. Any help appreciated.

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  • any software for managing data center, incidents, SLAs?

    - by coderwhiz
    I have been looking in using OTRS - ITSM to manage all of our services but wanted to know if any software existed that is not built into a ticket system? Pretty much want to add all services and tie them to an SLA. Once that is done, we would manually declare incidents and the system would automatically send our notificaton to the proper e-mail lists for downtime/planned maintenance. Would be nice if it calculates reports for SLAs etc. thanks

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  • Javascript function as a parameter to another function?

    - by Alex
    Hello there, I'm learning lots of javascript these days, and one of the things I'm not quite understanding is passing functions as parameters to other functions. I get the concept of doing such things, but I myself can't come up with any situations where this would be ideal? My question is: When do you want to have your javascript functions take another function as a parameter? Why not just assign a variable to that functions return value and pass that variable to the function like so: // Why not do this var foo = doStuff(params); callerFunction(foo); //instead of this callerFunction(doStuff); I'm confused as to why I would ever choose to do things as in my second example. Why would you do this? What are the use cases? Thanks!!

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  • How do I change colors on-the-fly in mintty?

    - by Thomas L Holaday
    How do I change the colors in a Cygwin mintty session which is already open? Is it possible? Use case: Under environment-imposed time constraints, multiple terminal windows have been opened without forethought. In order to reduce the risk of typing the commands for system A into the terminal for system B, it would be nice if they were different colors. Is there some escape sequence or whatnot that can change the color scheme for a running session?

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  • Running non-existing jar does not cause any expection/error

    - by Nikolay Kuznetsov
    Please, consider the following snippet which is being run from Eclipse. Even though the external jar file does not exist no Exception is thrown and process is not null. Why is it so? try { Process process = Runtime.getRuntime().exec("java -jar NonExisting.jar"); if (process == null) System.out.println("process = null"); else System.out.println(process); } catch (IOException e) { System.err.println(e); } It prints java.lang.ProcessImpl@1a4d139 If I run it manully from command line then there is an error: C:\Users\workspace\Project\src>java -jar NonExisting.jar Error: Unable to access jarfile NonExisting.jar

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  • Performance Overhead of Perf Event Subsystem in Linux Kernel

    - by Bo Xiao
    Performance counters for Linux are a new kernel-based subsystem that provide a framework for all things performance analysis. It covers hardware level (CPU/PMU, Performance Monitoring Unit) features and software features (software counters, tracepoints) as well. Since 2.6.33, the kernel provide 'perf_event_create_kernel_counter' kernel api for developers to create kernel counter to collect system runtime information. What I concern most is the performance impact on overall system when tracepoint/ftrace is enabled. There are no docs I can find about them. I was once told that ftrace was implemented by dynamically patching code, will it slow the system dramatically?

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  • Interview question - c#

    - by ltech
    I was tasked to conduct my first interview and would like to pose my question to this world for both their feedback on my question and also on their solutions. Question: I have a legacy system with users and files, the info of all files pertaining to a user are stored on a flat file. I want to upgrade this system by storing all info on a db, design tables, and create a C# system that will populate the new db as well as ftp the files to a new path. Define the desgin consideration and develop a prototype. Note: We are looking more for what design one would use and why rather than code that compiles. If it does then kudos to you and we will give it more weight. @Tim C, I did show the interviewee the file: User1234.txt UserID=1234 ParentPath=\\somewhere\nowehere\everywhere\1234 FileCount=20 File0=something0.ext .. File19=something19.ext @Tim C, I have never conducted an interview and I followed a script given to me by my senior developer who was absent.

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  • Storing millions of URLs in a database for fast pattern matching

    - by Paras Chopra
    I am developing a web analytics kind of system which needs to log referring URL, landing page URL and search keywords for every visitor on the website. What I want to do with this collected data is to allow end-user to query the data such as "Show me all visitors who came from Bing.com searching for phrase that contains 'red shoes'" or "Show me all visitors who landed on URL that contained 'campaign=twitter_ad'", etc. Because this system will be used on many big websites, the amount of data that needs to log will grow really, really fast. So, my question: a) what would be the best strategy for logging so that scaling the system doesn't become a pain; b) how to use that architecture for rapid querying of arbitrary requests? Is there a special method of storing URLs so that querying them gets faster? In addition to MySQL database that I use, I am exploring (and open to) other alternatives better suited for this task.

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  • c#, Internal, and Reflection

    - by cyberconte
    Duplicate of: Accessing internal members via System.Reflection? Is there a way to execute "internal" code via reflection? Here is an example program: using System; using System.Reflection; namespace ReflectionInternalTest { class Program { static void Main(string[] args) { Assembly asm = Assembly.GetExecutingAssembly(); // Call normally new TestClass(); // Call with Reflection asm.CreateInstance("ReflectionInternalTest.TestClass", false, BindingFlags.Default | BindingFlags.CreateInstance, null, null, null, null); // Pause Console.ReadLine(); } } class TestClass { internal TestClass() { Console.WriteLine("Test class instantiated"); } } } Creating a testclass normally works perfectly, however when i try to create an instance via reflection, I get a missingMethodException error saying it can't find the Constructor (which is what would happen if you tried calling it from outside the assembly). Is this impossible, or is there some workaround i can do?

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  • Powershell 2.0 - Running scripts for the command line call vs. from the ISE

    - by Gromix
    Hi, After writing deployment scripts from within the ISE, we need our CI server to be able to run them automatically, i.e. from the command line or via a batch file. I have notice some significant differences between the following calls: powershell.exe -File Script.ps1 powershell.exe -Command "& '.\Script.ps1'" powershell.exe .\Script.ps1 Some simple examples: When using -File, errors are handled in the exact same way as the ISE. The other two calls seem to ignore the $ErrorActionPreference variable, and do not catch Write-Error in try/catch blocks. When using pSake: The last 2 calls work perfectly Using the ISE or the -File parameter will fail with the following error: The variable '$script:context' cannot be retrieved because it has not been set Could someone help me understand the implications of each syntax, and why they are behaving differently? I would ideally like to find a syntax that works all the time and behaves like the ISE. Thanks, Romain

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  • Where to put my backup.sh?

    - by Temnovit
    I'm writing a shell script that will make backups of my system ( like this: https://help.ubuntu.com/8.04/serverguide/C/backup-shellscripts.html ). What is the best location in my system, to store this file? I know, I can put it anywhere, but what will be if it will be stored in a directory being backed up? What is the best practice here? I'm running an Ubuntu-server.

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  • htaccess for swf file

    - by Charles Wayne
    Does htaccess works with swf file that accepts variables? I have this swf url... http://subdom.domain.tld/subfolder/live.swf?stream=rtmp://stream.domain.com/application&provider=rtmp&file=streamname&autostart=true I want it to be rewrite as http://subdom.domain.tld/subfolder/assignedname/ So far this is what I written on .htaccess file RewriteEngine On RewriteRule ^kwt/?$ live.swf?stream=rtmp://stream.domain.com/application&provider=rtmp&file=streamname&autostart=true [NC,L] It does seem to rewrite to the swf file because the swf is showing but for some reason the variable is not recognized. It does not auto play even the auto play variable is set to true in the RewriteRule. Is there something wrong with my code or it can't be done in swf file?

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