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Articles indexed in April 2010

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  • Algorithm for matching partially filled words

    - by adnanhb
    Hello All, I am writing a game which when given a partially filled word, searches a dictionary and returns all the matching words. To that effect, I am trying to find an algorithm that can be used for the said purpose. For example, given - - a -, the algorithm will search a dictionary for all the words which have length 4 and have 'a' as the third letter. Is there such an algorithm already? If not, can somebody given a rough idea of how to design such an algorithm? Thanks in Advance.

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  • Wrong root on image_tag

    - by Euwyn
    On my dev setup, the image_tag is mysteriously pointing to my public www server (i.e. computing the image path as http://www.domain.com/images/blah.jpg). Where is this option set?

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  • Checking multiple conditions in Ruby (within Rails, which may not matter)

    - by Ev
    Hello rubyists and railers, I have a method which checks over a params hash to make sure that it contains certain keys, and to make sure that certain values are set within a certain range. This is for an action that responds to a POST query by an iPhone app. Anyway, this method is checking for about 10 different conditions - any of which will result in an HTTP error being returned (I'm still considering this, but possibly a 400: bad request error). My current syntax is basically this (paraphrased): def invalid_submission_params?(params) [check one] or [check two] or [check three] or [check four] etc etc end Where each of the check statements returns true if that particular parameter check results in an invalid parameter set. I call it as a before filter with params[:submission] as the argument. This seems a little ugly (all the strung together or statements). Is there a better way? I have tried using case but can't see a way to make it more elegant. Or, perhaps, is there a rails method that lets me check the incoming params hash for certain conditions before handing control off to my action method?

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  • Fields of class, are they stored in the stack or heap?

    - by Mirek
    I saw a question yesterday which raised (for me) another question. Please look at the following code: public class Class1 { int A; //as I uderstand, int is value type and therefore lives in the stack } class Class2 { Run() { Class1 instance1 = new Class1(); instance1.A = 10; //it points to value type, but isnt this reference (on heap)? } } Or while creating the instance of Class1, its field types are created on the heap as well? But then I do not understand when it would really be on the stack as almost always you need to create an instance of object in order to use it fields.

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  • Using Application Settings and reading defaults from app.config

    - by Peter Goras
    Hi, I need to deploy a Windows Forms application using ClickOnce deployment. (VS2008, .NET 3.5) And I need to provide a configuration file for this app that any user can modify. For this reason, I am using Application Settings instead of standard appSetttings in app.config so I can separate the the user config from app config. see http://msdn.microsoft.com/en-us/library/ms228995(VS.80).aspx Creating a Settings.settings file using VS generated a class with hard-coded default values like this: [global::System.Configuration.DefaultSettingValueAttribute("blahblah")] public string MyProperty ... WTF? I want to read the default values from the app.config! So I created my own class deriving from ApplicationSettingsBase but I cannot get this to read values from the app.config. Any ideas?

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  • Varying performance of MSVC release exe

    - by Andrew
    Hello everyone, I am curious what could be the reason for highly varying performance of the same executable. Sometimes, I run it and it takes 20 seconds and sometimes it is 110. Source is compiled with MSVC in Release mode with standard options. The code is here: vector<double> Un; vector<double> Ucur; double *pUn, *pUcur; ... // time marching for (old_time=time-logfreq, time+=dt; time <= end_time; time+=dt) { for (i=1, j=Un.size()-1, pUn=&Un[1], pUcur=&Ucur[1]; i < j; ++i, ++pUn, ++pUcur) { *pUcur = (*pUn)*(1.0-0.5*alpha*( *(pUn+1) - *(pUn-1) )); } Ucur[0] = (Un[0])*(1.0-0.5*alpha*( Un[1] - Un[j] )); Ucur[j] = (Un[j])*(1.0-0.5*alpha*( Un[0] - Un[j-1] )); Un = Ucur; }

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  • Are there scenarios where the ViewModel needs to invoke methods on the View w.r.t. MVVM in WPF?

    - by Gishu
    As per the pattern, the ViewModel exposes Properties(with change notification) and Commands (to notify the VM of user actions) that the View binds to. The only communication that flows from the VM to the View is the property change notifications (so that the View can refresh itself with updated data). In MVP or PresentationModel form of the pattern (if I'm not mistaken), the View implements a plain vanilla interface (consisting of methods, properties and/or events). With MVVM, it feels methods on the IView have been outlawed (along with IView itself). One scenario I could think of was to set the focus to a certain control in the View. (When the user does ActionX, the focus should immediately be set to FieldY). In MVP, I'd write this as IView.ActivateField(NameConstant), which the presenter or PM would invoke. In MVVM, this seems to be a fringe case that needs a workaround / little bit of code-behind. The VM implements an ActiveField Property, which it sets to NameConstant. The view picks up the change notification event and in a code-behind event handler, activates the Name control. Is the above just an exception to the norm? Or are there other such scenarios, where the VM needs to invoke a method on the View ?

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  • Recommendation for a Strategy Game Engine for .NET?

    - by Fred F.
    Can anyone recommend a strategy game engine for the .net framework. I downloaded XNA, but it is way beyond my needs. I just want to create a turn based strategy game. I have searched and searched, but all I cannnot find any examples. I have asked for something similiar before, but have not gotten any good answers.

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  • DotNetZip trouble with coding

    - by Xaver
    I am using DotNetZip. When i am archiving file which have english name all normally. but when i archiving file with russian names in result archive with bad names of file. Some peoplese said that string ZipConstants.DefaultCodePage = 866; But it not compile. I also use zip.UseUnicodeAsNecessary properties, and convert my file names to utf8 and utf7.

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  • How to prevent arbitrary code execution vulnerability in our programs?

    - by Calmarius
    You always read in changelogs when your system or browser or any program updates that they fixed a bug that made possible that an attacker can execute any code in your computer with a forged website, or attacking your computer with carefully forged packets, etc... Because you read it so often that means any program can have similar vulnerabilites... What causes this? how to design our programs to prevent similar issues?

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  • how to update date using phpmysql

    - by DAFFODIL
    This is how,i insert data into db,but now,i want a particular column to update,how do i do? $con = mysql_connect("localhost","root",""); if (!$con) { die('Could not connect: ' . mysql_error()); } mysql_select_db("form", $con); $sql="INSERT INTO Customer (Name, Address, City, Pincode, State, Country, Phone, Mobile, Fax, Email, Website, Notes) VALUES ('$_POST[name]','$_POST[address]','$_POST[city]','$_POST[pincode]','$_POST[state]','$_POST[country]','$_POST[phone]','$_POST[mobile]','$_POST[fax]','$_POST[email]','$_POST[url]','$_POST[notes]')"; if (!mysql_query($sql,$con)) { die('Error: ' . mysql_error()); } echo "1 record added"; mysql_close($con); ?

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  • regex. How can I match the value between '+' and ':' ?

    - by martin
    I have this string: sometext +[value]:- I would like to match the value(1-3 numerical characters) (with regex, javascript) sometext may contain a +sign if i'm unlucky so I don't wanna end up with matching some +text +value:- I sat up last night banging my head against this, so I would be really glad if someone could help me.

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  • Unmanaged C++ in .net

    - by _Avishay_
    Hi, can someone please tell why , Great Microsoft that created C# language and now we're in C# 4.0 , dont have an important feature that C++\CLI has !!,which is to directly compile and link with un-managed c++ ??

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  • Android custom ListView unable to click on items

    - by MattC
    So I have a custom ListView object. The list items have two textviews stacked on top of each other, plus a horizontal progress bar that I want to remain hidden until I actually do something. To the far right is a checkbox that I only want to display when the user needs to download updates to their database(s). When I disable the checkbox by setting the visibility to Visibility.GONE, I am able to click on the list items. When the checkbox is visible, I am unable to click on anything in the list except the checkboxes. I've done some searching but haven't found anything relevant to my current situation. I found this question but I'm using an overridden ArrayAdapter since I'm using ArrayLists to contain the list of databases internally. Do I just need to get the LinearLayout view and add an onClickListener like Tom did? I'm not sure. Here's the listview row layout XML: <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="?android:attr/listPreferredItemHeight" android:padding="6dip"> <LinearLayout android:orientation="vertical" android:layout_width="0dip" android:layout_weight="1" android:layout_height="fill_parent"> <TextView android:id="@+id/UpdateNameText" android:layout_width="wrap_content" android:layout_height="0dip" android:layout_weight="1" android:textSize="18sp" android:gravity="center_vertical" /> <TextView android:layout_width="fill_parent" android:layout_height="0dip" android:layout_weight="1" android:id="@+id/UpdateStatusText" android:singleLine="true" android:ellipsize="marquee" /> <ProgressBar android:id="@+id/UpdateProgress" android:layout_width="fill_parent" android:layout_height="wrap_content" android:indeterminateOnly="false" android:progressDrawable="@android:drawable/progress_horizontal" android:indeterminateDrawable="@android:drawable/progress_indeterminate_horizontal" android:minHeight="10dip" android:maxHeight="10dip" /> </LinearLayout> <CheckBox android:text="" android:id="@+id/UpdateCheckBox" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </LinearLayout> And here's the class that extends the ListActivity. Obviously it's still in development so forgive the things that are missing or might be left laying around: import java.util.List; import android.app.ListActivity; import android.content.Context; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.CheckBox; import android.widget.ListView; import android.widget.ProgressBar; import android.widget.TextView; import com.xxxx.android.R; import com.xxxx.android.DAO.AccountManager; import com.xxxx.android.model.UpdateItem; public class UpdateActivity extends ListActivity { AccountManager lookupDb; boolean allSelected; UpdateListAdapter list; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); lookupDb = new AccountManager(this); lookupDb.loadUpdates(); setContentView(R.layout.update); allSelected = false; list = new UpdateListAdapter(this, R.layout.update_row, lookupDb.getUpdateItems()); setListAdapter(list);

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  • Intersection of line with cube and knowing the point of intersection.

    - by Raj
    Hello everyone, description 1.lines are originating from origin(0,0,0). 2.lines are at some random angle to the Normal of Top face of teh cube. 3.if the lines are intersecting cube , calculate the intersection point. 4.mainly i wan to know how much distance ,line traveled inside the cube. I dont know exactly which approach should i take , i will be pleased and thankful if someone could guied me to the right direction, to use OpenGL, DirectX or some other library, for C# . some example or sample will be appriciated.

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  • Windows Vista Update Now Wont Boot Up

    - by thatryan
    My friend just updated her Windows Vista to service pack 1, or tried to. Now it wont boot up. Just black screen, some errors etc. I tried googling it and lots of people had this problem it seems. Anyone find a fix for it? I read somewhere I believe that Microsoft said to delete some files, Nvidia maybe? But I can not find that again, I forgot the exact error code I searched for before. Does anyone know what I am talking about? LOL Thanks guys.

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  • GhettoVCB.sh log is wrong

    - by Michael
    2010-02-25 16:03:02 -- info: CONFIG - VM_BACKUP_ROTATION_COUNT = 2 2010-02-25 16:03:02 -- info: CONFIG - DISK_BACKUP_FORMAT = thin 2010-02-25 16:03:02 -- info: ============================== ghettoVCB LOG START ============================== 2010-02-25 16:03:02 -- info: CONFIG - ADAPTER_FORMAT = buslogic 2010-02-25 16:03:02 -- info: CONFIG - POWER_VM_DOWN_BEFORE_BACKUP = 0 2010-02-25 16:03:02 -- info: CONFIG - ENABLE_HARD_POWER_OFF = 0 2010-02-25 16:03:02 -- info: CONFIG - VM_BACKUP_VOLUME = /vmfs/volumes/nfs_storage_backup/vm1 2010-02-25 16:03:02 -- info: CONFIG - ITER_TO_WAIT_SHUTDOWN = 3 2010-02-25 16:03:02 -- info: CONFIG - VM_BACKUP_ROTATION_COUNT = 2 2010-02-25 16:03:02 -- info: CONFIG - POWER_DOWN_TIMEOUT = 5 2010-02-25 16:03:02 -- info: CONFIG - DISK_BACKUP_FORMAT = thin 2010-02-25 16:03:02 -- info: CONFIG - SNAPSHOT_TIMEOUT = 15 2010-02-25 16:03:02 -- info: CONFIG - ADAPTER_FORMAT = buslogic 2010-02-25 16:03:02 -- info: CONFIG - LOG_LEVEL = info 2010-02-25 16:03:02 -- info: CONFIG - BACKUP_LOG_OUTPUT = /tmp/ghettoVCB.log 2010-02-25 16:03:02 -- info: CONFIG - POWER_VM_DOWN_BEFORE_BACKUP = 0 2010-02-25 16:03:02 -- info: CONFIG - ENABLE_HARD_POWER_OFF = 0 2010-02-25 16:03:02 -- info: CONFIG - ITER_TO_WAIT_SHUTDOWN = 3 2010-02-25 16:03:02 -- info: CONFIG - VM_SNAPSHOT_MEMORY = 0 2010-02-25 16:03:02 -- info: CONFIG - VM_SNAPSHOT_QUIESCE = 0 2010-02-25 16:03:02 -- info: CONFIG - POWER_DOWN_TIMEOUT = 5 2010-02-25 16:03:02 -- info: CONFIG - VMDK_FILES_TO_BACKUP = all 2010-02-25 16:03:02 -- info: CONFIG - SNAPSHOT_TIMEOUT = 15 2010-02-25 16:03:02 -- info: CONFIG - LOG_LEVEL = info 2010-02-25 16:03:02 -- info: CONFIG - BACKUP_LOG_OUTPUT = /tmp/ghettoVCB.log 2010-02-25 16:03:02 -- info: CONFIG - VM_SNAPSHOT_MEMORY = 0 2010-02-25 16:03:02 -- info: CONFIG - VM_SNAPSHOT_QUIESCE = 0 2010-02-25 16:03:02 -- info: CONFIG - VMDK_FILES_TO_BACKUP = all 2010-02-25 16:03:13 -- info: Initiate backup for VM1 2010-02-25 16:03:13 -- info: Initiate backup for VM1 2010-02-25 16:03:13 -- info: Creating Snapshot "ghettoVCB-snapshot-2010-02-25" for VM1 2010-02-25 16:03:13 -- info: Creating Snapshot "ghettoVCB-snapshot-2010-02-25" for VM1 Failed to clone disk : The file already exists (39). Destination disk format: VMFS thin-provisioned Cloning disk '/vmfs/volumes/datastore1/machine/VM1.vmdk'... 2010-02-25 16:04:16 -- info: Removing snapshot from VM1 ... Destination disk format: VMFS thin-provisioned Cloning disk '/vmfs/volumes/datastore1/machine/VM1.vmdk'... How can I fix this issue, the backup is working, but the log shows something like 2 back-up's in the exact time?

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