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  • How to use Object.GetHashCode() on a type that overrides GetHashCode()

    - by Jimmy
    Hi, I have a class A that implements IEquatable<, using its fields (say, A.b and A.c) for implementing/overriding Equals() and overriding GetHashCode(), and everything works fine, 99% of the time. Class A is part of a hierarchy (class B, C) that all inherit from interface D; they can all be stored together in a dictionary Dictionary, thus it's convenient when they all carry their own default Equals()/GetHashCode(). However, while constructing A I sometime need to do some work to get the values for A.b and A.c; while that's happening, I want to store a reference to the instance that's being built. In that case, I don't want to use the default Equals()/GetHashCode() overrides provided by A. Thus, I was thinking of implementing a ReferenceEqualityComparer, that's meant to force the use of Object's Equals()/GetHashCode(): private class ReferenceEqualityComparer<T> : IEqualityComparer<T> { #region IEqualityComparer<T> Members public bool Equals(T x, T y) { return System.Object.ReferenceEquals(x, y); } public int GetHashCode(T obj) { // what goes here? I want to do something like System.Object.GetHashCode(obj); } #endregion } The question is, since A overrides Object.GetHashCode(), how can I (outside of A) call Object.GetHashCode() for an instance of A? One way of course would be for A to not implement IEquatable< and always supply an IEqualityComparer< to any dictionary that I create, but I'm hoping for a different answer. Thanks

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  • Custom built accounts package running on windows vista , printer selection box not now appearing

    - by liam hester
    This package has a printer function for documents which always brought up the printer selection box from which one picked the appropiate printer. Now recently,almost certainly as a result of windows updates, when I select PRINT nothing happens. The printer is working fine, and indeed a 'direct print' option to the default printer which is a matrix printer works fine, as it does not invoke the printer selection process. Does anyone know if there is a particular setting which might be causing this to happen. It works fine still on all previous windows versions XP etc, but will not work on Vista or later versions. Or is there a program code fix that anyone could suggest. Many thanks Liam

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  • ClassCastException when casting custom View subclass

    - by Jens Jacob
    Hi I've run into an early problem with developing for android. I've made my own custom View (which works well). In the beginning i just added it to the layout programmatically, but i figured i could try putting it into the XML layout instead (for consistency). So what i got is this: main.xml: [...] <sailmeter.gui.CompassView android:id="@+id/compassview1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/widget55" android:background="@color/white" /> [...] CompassView.java: public class CompassView extends View { } SailMeter.java (activity class): public class SailMeter extends Activity implements PropertyChangeListener { public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); compassview = (CompassView) findViewById(R.id.compassview1); [...] } } (Theres obviously more, but you get the point) Now, this is the stacktrace: 05-23 16:32:01.991: ERROR/AndroidRuntime(10742): Uncaught handler: thread main exiting due to uncaught exception 05-23 16:32:02.051: ERROR/AndroidRuntime(10742): java.lang.RuntimeException: Unable to start activity ComponentInfo{sailmeter.gui/sailmeter.gui.SailMeter}: java.lang.ClassCastException: android.view.View 05-23 16:32:02.051: ERROR/AndroidRuntime(10742): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2596) 05-23 16:32:02.051: ERROR/AndroidRuntime(10742): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2621) 05-23 16:32:02.051: ERROR/AndroidRuntime(10742): at android.app.ActivityThread.access$2200(ActivityThread.java:126) 05-23 16:32:02.051: ERROR/AndroidRuntime(10742): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1932) 05-23 16:32:02.051: ERROR/AndroidRuntime(10742): at android.os.Handler.dispatchMessage(Handler.java:99) 05-23 16:32:02.051: ERROR/AndroidRuntime(10742): at android.os.Looper.loop(Looper.java:123) 05-23 16:32:02.051: ERROR/AndroidRuntime(10742): at android.app.ActivityThread.main(ActivityThread.java:4595) 05-23 16:32:02.051: ERROR/AndroidRuntime(10742): at java.lang.reflect.Method.invokeNative(Native Method) 05-23 16:32:02.051: ERROR/AndroidRuntime(10742): at java.lang.reflect.Method.invoke(Method.java:521) 05-23 16:32:02.051: ERROR/AndroidRuntime(10742): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 05-23 16:32:02.051: ERROR/AndroidRuntime(10742): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 05-23 16:32:02.051: ERROR/AndroidRuntime(10742): at dalvik.system.NativeStart.main(Native Method) 05-23 16:32:02.051: ERROR/AndroidRuntime(10742): Caused by: java.lang.ClassCastException: android.view.View 05-23 16:32:02.051: ERROR/AndroidRuntime(10742): at sailmeter.gui.SailMeter.onCreate(SailMeter.java:51) 05-23 16:32:02.051: ERROR/AndroidRuntime(10742): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 05-23 16:32:02.051: ERROR/AndroidRuntime(10742): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2544) 05-23 16:32:02.051: ERROR/AndroidRuntime(10742): ... 11 more Why cant i cast my custom view? I need it to be that type since it has a few extra methods in it that i want to access. Should i restructure it and have another class handle the logic, and then just having the view being a view? Thanks for any help.

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  • Unable to cast type isse in silverlight

    - by prince23
    error once i clcik on the button i am getting this error. this is my code <sdk:DataGrid MinHeight="100" x:Name="dgCounty" AutoGenerateColumns="False" VerticalAlignment="Top" IsReadOnly="True" Margin="5,5,5,0" RowDetailsVisibilityChanged="dgCounty_RowDetailsVisibilityChanged" RowDetailsVisibilityMode="VisibleWhenSelected"> <sdk:DataGrid.Columns> <data:DataGridTemplateColumn.CellTemplate> <DataTemplate> <Button Content="+" Click="Button_Click"></Button> </DataTemplate> private void Button_Click(object sender, RoutedEventArgs e) { Button btnExpandCollapse = sender as Button; var Row = DataGridRow.GetRowContainingElement(sender as FrameworkElement); if (Row.DetailsVisibility == Visibility.Collapsed) { Row.DetailsVisibility = Visibility.Visible; } else { Row.DetailsVisibility = Visibility.Collapsed; } if (btnExpandCollapse.Content.ToString() == "+") { btnExpandCollapse.Content = "-"; } else if (btnExpandCollapse.Content.ToString() == "-") { btnExpandCollapse.Content = "+"; } } void dtg_RowDetailsVisibilityChanged(object sender, DataGridRowDetailsEventArgs e) { DataGrid RowDetails = e.DetailsElement as DataGrid if(RowDetails.YourDesiciveFlag = true) { } else { } } } working on this issue from past 3 days any idea how to solve this issue. just going mad on this issue. for expand /collpase in data grid in silverlight. let me know if you people can provide me any code that can solve my issue. thanks in advance prince

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  • Burning a Custom CD/DVD software Image

    - by Iceking007
    Hello I am trying to Burn a disk let me catch you up where I am at as I have a very SPECIFIC question and it may be difficult to explain but I will try to keep it simple: I have software already in an ISO file; I am using Daemon tools on a Windows based PC What I am wanting to do is create the actual Picture (not disk image file) that will show up on the Disk drive when I insert the disk Eg: if you put microsoft Office 11 in your comp. you open up My Computer to view all your HD and Disk drives you will see the image that microsoft put on the disk which is a silver CD and the Microsoft Office logo on the top corner. I would like to know how to edit my current ISO file or what I need to do in order to put "A PICTURE" or "AN ICON FILE" on the CD/DVD so that when I insert the disk into any PC it will show up with the PICTURE OR ICON file I chose and look proffessional. Thank you for your time

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  • Custom initrd init script: how to create /dev/initctl

    - by Posco Grubb
    I have a virtual machine (VMM is Xen 3.3) equipped with two IDE HDD's (/dev/hda and /dev/hdb). The root file system is in /dev/hda1, where Scientific Linux 5.4 is installed. /dev/hdb contains an empty ext2 file system. I want to protect the root file system from writes by the VM by using aufs (AnotherUnionFS) to layer a writable file system on top of the root file system. The changes to / will be written to the file system located on /dev/hdb. (Furthermore, outside the VM, the file backing the /dev/hda will also be set to read-only permissions, so the VMM should also prevent the VM from modifying at that level.) (The purpose of this setup: be able to corrupt a virtual machine using software-implemented fault injection but preserve the file system image in order to quickly reboot the VM to a fault-free state.) How do I get an initrd init script to do the necessary mounts to create the union file system? I've tried 2 approaches: I've tried modifying the nash script that mkinitrd creates, but I don't know what setuproot and switchroot do and how to make them use my aufs as the new root. Apparently, nobody else here knows either. (EDIT: I take that back.) I've tried building a LiveCD (using linux-live-6.3.0) and then modifying the Bash /linuxrc script from the generated initrd, and I got the mounts correct, but the final /sbin/init complains about /dev/initctl. Specifically, my /linuxrc mounts the aufs at /union. The last few lines of /linuxrc effectively do the following: cd /union mkdir -p mnt/live pivot_root . mnt/live exec sbin/chroot . sbin/init </dev/console >/dev/console 2>&1 When init starts, it outputs something like init: /dev/initctl: No such file or directory. What is supposed to create this FIFO? I found no such filename in the original linuxrc and liblinuxlive scripts. I tried creating it via "mkfifo /dev/initctl", but then init complained about a timeout opening or writing to the FIFO. Would appreciate any help or pointers. Thanks.

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  • HP-UX - custom rsync path

    - by stack_zen
    Hi. There are a range of HP-UX 11.11 hosts I'm unable to install rsync (I'm limited to a non-privileged user) I've extracted both rsync binary and libpopt.sl, libiconv.sl, libintl.sl from the depots into one of that user's directories: /home/zenith/rsync/ Problem is, I can't get my RH Linux box communicating with it: rsync -e --rsync-path=/home/zenith/rsync/rsync --compress=9 -pgtov --filter=+rs_/'*.log' --exclude='*' [email protected]:/home/zenith/service/logs/ /u01/rsync_depot/service/192.102.14.18/ /usr/lib/dld.sl: Can't find path for shared library: libintl.sl /usr/lib/dld.sl: No such file or directory sh: 1644 Abort(coredump) I've added to the remote host .profile export SHLIB_PATH=/usr/lib:/home/zenith/rsync export PATH=$PATH:/home/zenith/rsync but still, no libintl.sl is found. How can I initialize the correct env variable/ get this to work?

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  • adding custom header with classic asp

    - by zurna
    I was wondering if its possible to add custom header with classic asp. In other words, I am looking for classic asp equivalent of .net's Response.AddHeader(). i.e. HttpContext.Response.AddHeader("customheadertruefalse","1");

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  • describe class versions of primitive type data

    - by paula
    please some explain to me this.... Explain why java has class versios of primitive data types? describe the class versions of primitive java types and expain pros and cons? expalin why class versions of primitive java types are available, but why the primitive types are still frequently used? expalin how primitive and non-primitive data types are passed as parameters to methods in java and how that affects altering the value of data passed? primitve data types are: int, float, char, long, short, byte, boolean and double.

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  • NAnt doesn't recognize patternset type

    - by veljkoz
    I've downloaded the new version of NAnt 0.91 Alpha 1 release and it doesn't seem to recognize the patternset as in: <?xml version="1.0" encoding="UTF-8" ?> <project name="Testing project" default="testMe"> <patternset id="build.files"> <include name="*.dll" /> </patternset> <target name="testMe"> <echo message="hi" /> </target> </project> The error I get when running nant /f:mytest.build is: Invalid element <patternset>. Unknown task or datatype. Am I missing something?

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  • send and recieve email with custom domain address, using gmail

    - by ahmad598
    i've registered a domain, and went to create a google apps account with that. but google told me they don't accept .ir domains, possibly trying to prevent us from building bombs (which completely makes sense), or simply lack of interest. anyway. so now i'm seeking for a way to use gmail, but with my own domain name, all without using google apps. i've added my domain to a free dnspark.net account, and it doesn't have mail forwarding, but i can set MX records. is there anyway i could accomplish my task? or is it completely impossible?

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  • Running django custom management commands with supervisord

    - by mfsaint
    I'd like to use supervisord to run some commands for my Django project but I keep getting the following error: supervisor.log: 2012-05-18 17:52:15,784 INFO spawnerr: can't find command 'source' If I remove the "source" command, the log shows the same error: can't find command 'python'. supervisord.conf excerpt: [program:django] directory=/home/mf/projects/djangopj/ command=beanstalkd -l 127.0.0.1 -p 11300 command=source /home/mf/virtualenvs/env/bin/activate command=python manage.py command1 command=python manage.py command2 user=mf autostart=true autorestart=true I tried removing the directory and adding the absolute path to the commands but I kept getting the same error. I run supervisord with the following command: supervisord -c supervisord.conf -l supervisor.log

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  • Adding custom perfomance counters in ASP.Net for service calls

    - by Nithin
    Hi All, I have to show the time taken for a service call in Perfmon from my ASP.Net application. For this, I have added a stopwatch which starts at the service call start and stops at service call stop. Now I have a custom counter which user AverageTimer32 to log the stopwatch values to Perfmon. My question is, how can I show the service names on the Perfmon graph. I am using windows XP (I know windows server perfmon has some fancy stuff).

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  • Diff between $.ajaxSetup and $.ajax in jquery

    - by Deeptechtons
    title is a bit misleading but i would like to know internally (what happens during ajax request) when i execute Code 1 and Code 2 in turns Code 1 $.ajax({url:"1.aspx/HelloWorld",type:"GET",dataType:"json",contentType:"application/json"}); Code 2 $.ajaxSetup({ contentType: "application/json", dataType: "json" }); $.get("1.aspx/HelloWorld","",$.noop,"json"); i ask this because the method HelloWorld in page 1.aspx is executed correctly when run Code 1. But the seconds one refuses to invoke the pageMethod. I have set the ContentType and data as expected but the second request in Code 2 refuses to invoke the method does anyone have a reason for this ?

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  • Custom title bar without padding (Android)

    - by Casebash
    So I am using the techniques in this thread to use a custom background for my titlebar. Unfortunately the framework places my layout inside a FrameLayout which has padding and so the image doesn't cover the whole bar, but instead has gray borderes. Is there anyway to remove this padding? I can't just set the padding attributes because I do not create the frame layout.

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  • emacs, writing custom commands which use term-mode

    - by valya
    Hello, I'm using Emacs and M-x term for a terminal. Since my typical workflow looks like this: edit some code C-x C-o to the terminal buffer (or C-x b term[Enter] or something) press Up key to use the last command press Enter to run it C-x C-o to go back I want to bind all of these (except the first step... maybe) to one command, I believe Emacs is awesome enough to do that :-) So, a command must: go to the buffer with terminal (maybe it shouldn't change any windows at all, maybe it should split the window vertially (if it weren't split already) and use the right sid) run a last command what've been run there go back to the last buffer/part of the screen Thank you! I'm not really used to the Emacs scripting system, and I hope someone will help me and someone else will be able to use the answer to improve his workflow, since I believe this is a pretty common one Examples of commands: python manage.py test python manage.py test stats python solve.py # for project-euler puzzles :-) the first and the second runs over a ssh (in a terminal) sometimes (I like developing with vagrant) I understand that it's easy to bind the first and the third ones, but the second changes too often - I'd just like to "run last command"

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  • c# reading integer fields from database, returning empty string when reading integer type field

    - by arnoldino
    what is wrong with this code? field="id"; table="MInvMonth"; condition="machine_id=37"; public static String getConditionedField(String field, String table, String condition) try { if (cmd == null) getConnection(); cmd.CommandText = "Select " + field + " from " + table + " where " + condition; SQLiteDataReader reader = cmd.ExecuteReader(); if (reader.HasRows==true) { reader.Read(); string s = reader[0].ToString(); // return first element reader.Close(); return s; } reader.Close(); return null; } catch (Exception e) { MessageBox.Show("Caught exception: " + e.Message+"|"+cmd.CommandText); return null; } I checked the sql statement, it turns the right value. why can't I read it? the returnvalue is "".

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  • JSP Custom Tag Library vs JSP2 Tag Files

    - by Vinayak.B
    Can anybody gimme the idea about the JSP custom tag library and the JSP 2 Tag files.. Are this two are alternatives to use....??? If there is any comparision(or merits and demerits) among this please do specify.. And which one of this is better to work with.. I m waiting for the kind suggestions.. Regards, Vinayak

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  • asp.net mvc session and custom MembershipProvider

    - by niao
    Greetings, in my ASP.NET MVC application I've created a custom MembershipProvider. It works fine, however when user is successfully logged, I would like to create an Operator object and make it possible to access this object on every controller and view. I was thinking about session to do this but when session expires this object is null but user that had been logged using MembershipProvider is still logged in. Is there any way I can store my Operator object in MembershipProvider and access it on every controller and view I need?

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  • Excel 2007 Conditional Formatting is not properly using custom formula provided

    - by Charles
    In Excel 2007, I want to conditionally color a row if it is odd numbered and then vary the coloring depending on if a specific cell (in column E) in that row contains a number (green) or empty(red). E.g. if E15 has a value of 2 and E13 has no entry, I would expect row 15 to be green and row 13 to be red. My two formulas are: To color red: =IF((MOD(ROW(),2) = 1),NOT(ISNUMBER(INDIRECT("$E$"&ROW()))), FALSE) To color green: =IF((MOD(ROW(),2) = 1),ISNUMBER(INDIRECT("E"&ROW())), FALSE) If I paste these formulas into cells on the worksheet I get the expected values. For row 15 the "red" equation is false and the "green" equation is true. For Row 13 the "red" equation is true and the "green equation is false. However if I use these formulas in the conditional formating use formula feature, all of my rows are red, any thoughts?

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