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• Mysql and Subsonic 3 with LINQ: Cannot insert rows

  - by Gustavo

  I'm using Susbsonic 3 with the LINQ templates. I've already added a column called 'ID' to my Articles table. When I try to insert a row using the following code var db = new LDB(); int newID = db.Insert.Into<ArticlesTable> ( x => x.Description ).Values( "TestDescription" ).Execute(); I get the following error message Can't decide which property to consider the Key - you can create one called 'ID' or mark one with SubSonicPrimaryKey attribute Any clue on what I'm doing wrong?

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• What's the difference between !col and col=false in MySQL?

  - by Mask

  The two statements have totally different performance: mysql> explain select * from jobs where createIndexed=false; +----+-------------+-------+------+----------------------+----------------------+---------+-------+------+-------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +----+-------------+-------+------+----------------------+----------------------+---------+-------+------+-------+ | 1 | SIMPLE | jobs | ref | i_jobs_createIndexed | i_jobs_createIndexed | 1 | const | 1 | | +----+-------------+-------+------+----------------------+----------------------+---------+-------+------+-------+ 1 row in set (0.01 sec) mysql> explain select * from jobs where !createIndexed; +----+-------------+-------+------+---------------+------+---------+------+-------+-------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +----+-------------+-------+------+---------------+------+---------+------+-------+-------------+ | 1 | SIMPLE | jobs | ALL | NULL | NULL | NULL | NULL | 17996 | Using where | +----+-------------+-------+------+---------------+------+---------+------+-------+-------------+ Column definition and related index for aiding analysis: createIndexed tinyint(1) NOT NULL DEFAULT 0, create index i_jobs_createIndexed on jobs(createIndexed);

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• How do i create a group of h:selectOneRadio in JSF?

  - by Nitesh Panchal

  Hello, I am trying to create a grooup of h:selectOneRadio but ui:repeat gives it different id for each row. This is my code :- <ui:repeat id="themes" value="#{RegisterBean.objBlogTemplateList}" var="item"> <p:graphicImage alt="#{item.templatePicName}" style="border: solid 5px white;width: 200px;height: 200px;" value="#{app:getCommonImagePath(item.templatePicName)}"/> <h:selectOneRadio rendered="false" value="#{RegisterBean.blogTemplateId}" layout="lineDirection" id = "rdTemplateId"> <f:selectItem itemLabel="#{item.templateName}" itemValue="#{item.templateId}"/> </h:selectOneRadio> </ui:repeat> Actually i want to create a single radio button with different selectItems in it which should be from the rows of my table in database. How do i do this?

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• Sudoku solver evaluation function

  - by Rich

  Hi, So I'm trying to write a simple genetic algorithm for solving a sudoku (not the most efficient way, I know, but it's just to practice evolutionary algorithms). I'm having some problems coming up with an efficient evaluation function to test if the puzzle is solved or not and how many errors there are. My first instinct would be to check if each row and column of the matrix (doing it in octave, which is similar to matlab) have unique elements by ordering them, checking for duplicates and then putting them back the way they were, which seems long winded. Any thoughts? Sorry if this has been asked before...

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• Memory Efficient file append

  - by lboregard

  i have several files whose content need to be merged into a single file. i have the following code that does this ... but it seems rather inefficient in terms of memory usage ... would you suggest a better way to do it ? the Util.MoveFile function simply accounts for moving files across volumes private void Compose(string[] files) { string inFile = ""; string outFile = "c:\final.txt"; using (FileStream fsOut = new FileStream(outFile + ".tmp", FileMode.Create)) { foreach (string inFile in files) { if (!File.Exists(inFile)) { continue; } byte[] bytes; using (FileStream fsIn = new FileStream(inFile, FileMode.Open)) { bytes = new byte[fsIn.Length]; fsIn.Read(bytes, 0, bytes.Length); } //using (StreamReader sr = new StreamReader(inFile)) //{ // text = sr.ReadToEnd(); //} // write the segment to final file fsOut.Write(bytes, 0, bytes.Length); File.Delete(inFile); } } Util.MoveFile(outFile + ".tmp", outFile); }

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• How can I force my checkbox's text to not wrap?

  - by B. Clay Shannon

  This is what my LinearLayout (horizontal) row looks like: I want the text of the checkbox to be on one line; The buttons don't have to be that wide - they'll still have plenty of space with the checkbox text lengthened a bit. What in my XML: <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <CheckBox android:id="@+id/ckbxAllow_New_Items" android:layout_width="0dip" android:layout_height="fill_parent" android:layout_weight="1" android:checked="true" android:text="@string/checkbox_Allow_New_Items" /> <Button android:id="@+id/btnOK" android:layout_width="0dip" android:layout_height="wrap_content" android:layout_weight="1" android:text="@string/button_OK" /> <Button android:id="@+id/btnCancel" android:layout_width="0dip" android:layout_height="wrap_content" android:layout_weight="1" android:text="@string/button_Cancel" /> </LinearLayout> ...needs to change in order to force my checkbox text not to wrap? UPDATE Following Der Golem's suggestion by adding this: android:lines="1" ...and also changing layout_weight for the checkbox from 1 to 2 (set to 1 for the buttons) gave me what I wanted:

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• Multi Select Checkbox using ListView

  - by Parsa

  I have a CheckBox in the header of ListView. I write a code to select all Checkboxes in ItemTemplate automatically when the user select the checkBox in the header of ListView. This code is useful, when you bind your ListView in DataPager_PreRender. protected void DataPager1_PreRender(object sender, EventArgs e) { //get the user id of the current user Guid userGuid = (Guid)Membership.GetUser().ProviderUserKey; ListView1.DataSource = MyClass.MyStaticMethod(userGuid.ToString()); ListView1.DataBind(); } protected void ListView1_ItemCreated(object sender, ListViewItemEventArgs e) { //Find the checkBox in each Row CheckBox checkBoxRow = e.Item.FindControl("CheckBoxRow") as CheckBox; //Assign the value of checkBoxHeader to the checkBoxRow checkBoxRow.Checked = CheckBoxHeader.Checked; } protected void ListView1_PagePropertiesChanged(object sender, EventArgs e) { // assign false value to the CheckBoxHeader when user click on the DataPager // so if checkboxheader is true in the page 1, when user select Page 2,this check box will be false // therefore all checkbox rows will be false in the new page. if (CheckBoxHeader.Checked == true) CheckBoxHeader.Checked = false; }

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• SQL Server 2008 database mirroring madness

  - by Dmitri Nesteruk

  I'm trying to get database mirroring to work on SQL Server 2008 between two computers. I checked connectivity, but here's what I end up with: on the principal machine, the server can connect to the mirror but refuses to set up a mirroring partnership due to it being 'unable to connect' (I checked connectivity, everything works). The weird thing has happened on the mirror. First, the mirror now thinks it's being mirrored. Second, after I delete and recover the mirrored database, it goes into Restoring... mode and just gets stuck there. Any ideas you might have on this are appreciated. Thanks!

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• Add columns to a datatable in c#?

  - by Pandiya Chendur

  I have a csv reader class that reads a .csv file and its values.... I have created datatable out of it... Consider my Datatable contains three header columns Name,EmailId,PhoneNo.... The values have been added successfully.... Now i want to add two columns IsDeleted,CreatedDate to this datatable... I have tried this but it doesn't seem to work, foreach (string strHeader in headers) { dt.Columns.Add(strHeader); } string[] data; while ((data = reader.GetCSVLine()) != null) { dt.Rows.Add(data); } dt.Columns.Add("IsDeleted", typeof(byte)); dt.Columns.Add(new DataColumn("CreatedDate", typeof(DateTime))); foreach (DataRow dr in dt.Rows) { dr["IsDeleted"] = Convert.ToByte(0); dr["CreatedDate"] = Convert.ToDateTime(System.DateTime.Now.ToString()); dt.Rows.Add(dr); } When i try to add isdeleted values an error saying This row already belongs to this table. ....

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• Do I need the bin\debug\appName.vshost.exe and appName.vshost.manifest in my SVN code repository?

  - by Bruce Lee

  I am building an application which is based on a sample application, written in C# on .NET 2, and is built on VS2008. This application is mostly a wrapper for a COM application. However I compile it in .NET 3.5. The sample application came with the following files in it's bin\debug: appName.vshost.exe appName.vshost.exe.manifest I noticed that I can delete the files and VS re-builds vshost.exe, and the vshost.manifest file appears with modification date the same as the deleted file as if VS has copied in from somewhere. My question is, should I put this files in my SVN code repository?

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• Replace values in a dataframe based on another factor which contains NA's in R

  - by PaulHurleyuk

  I have a dataframe which contains (among other things) a numeric column with a concentration, and a factor column with a status flag. This status flag contains NA's. Here's an example df<-structure(list(conc = c(101.769, 1.734, 62.944, 92.697, 25.091, 27.377, 24.343, 55.084, 0.335, 23.280), status = structure(c(NA, NA, NA, NA, NA, NA, 2L, NA, 1L, NA), .Label = c("<LLOQ", "NR"), class = "factor")), .Names = c("conc", "status"), row.names = c(NA, -10L), class = "data.frame") I want to replace the concentration column with a string for some values of the flag column, or with the concentration value formatted to a certain number of significant digits. When I try this ifelse(df$status=="NR","NR",df$conc) The NA's in the status flag don't trigger either the true or false condition (and return NA) - as the documentation suggests it will. I could loop over the rows and use IF then else on each one but this seems inefficient. Am I missing something ? I've tried as.character(df$status) as well which doesn't work. My mojo must be getting low....

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• Django 1.2 object level permissions - third party solutions?

  - by mawimawi

  Since Django 1.2 final is almost out, I am curious if there are already projects that use the new object level permissions / row level permissions system. [django-authority][1] which is a possible solution for Django up to 1.1 has not been updated for a while, and does not (yet) use the new permissions system. It seems to me that Django-Authority is in a comatose state. Does someone know about upcoming or maybe even finished solutions? I'd appreciate any good links to active projects with at least some downloadable content very much. [1]: http://packages.python.org/django-authority/ django-authority

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• High PageIOLatch_SH Waits with High Drive Idle times

  - by Marty Trenouth

  We are experiencing high volume of PageIOLatch_SH waits on our database (row counts in the Billions). However it seems that our drive Idle time Percentage hovers around 50-60 percent. CPU usage is nill. The Database Tuning Advisor gives no suggestions for optimization. The query plan (actual) from the single stored procedure used on the database puts the majority of the expense on index seek (yeah I know these should be optimial) operations. Anyone have suggestions of how to increase throughput?

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• Transferring a flat file database to a MySQL database

  - by Jon

  I have a flat file database (yeah gross I know - the worst part is that it's 1.4GB), and I'm in the process of moving it to a MySQL database. The problem is that I'm not sure how to go about doing this - and I've checked through every related question on here but none relate to what I want to do, nor how my database is currently setup. My current flat file database is setup to where a normal MySQL row is its own file, and a MySQL table would be the directory. So for example if you have a user named Jon, there would be a file for the user in a directory named /members/. Within that file would be various information for the user including the users id, rank etc - all separated by tabs, all on separate lines (userid\t4). So here's an example user file: userid 4 notes staff notes: bla bla staff2 notes: bla bla bla username Example So how can I convert the above into their own rows and fields in MySQL? And if possible, could I do thousands of these files at once? Thanks.

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• Setting Sql server security rights for multiple situations

  - by DanDan

  We have an application which uses an instance of Sql Server locally for its backend storage. The administrator windows login has had its sysadmin right revoked, and instead two sql logins have been created; one for the application with a secret password and one read only login we let users view the raw data with. This was working fine until we moved on FileStreams, which requires intergrated windows authentication. So now the sql server logins must be replaced. As a result, I am now reviewing all of our logins but I am not sure how it is possible. It seems that the application needs full read/write access, yet I still need to lock down writing to the tables so the user cannot login into the database and delete data randomly. Does anyone have any tips for setting multiple levels of security using intergrated windows logins, or can you direct me to any further reading? Some answers can also be found on serverfault: http://serverfault.com/questions/138763/setting-sql-server-security-rights-for-multiple-situations

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• JQuery - Ajax saving sortables in connected lists when sortable item is moved

  - by Ben Sinclair

  I have multiple JQuery sortable lists that connect with each other... They allow you to assign users to certain roles. Basically what I want to do is when a user is dragged from one list to another, I want JQuery to pick up the first list that the user was moved from so that I can send an AJAX request to delete it from that list in my database. I tried the following but every time you move the user over a list and haven't even dropped it within a list, it sends this request which means I'll be sending multiple AJAX requests... Does that make sense? $( ".selector" ).sortable({ out: function(event, ui) { ... } }); From my testing, I can use the following code to just update the list that user has been moved to so I've got the second half covered: $( ".selector" ).sortable({ receive: function(event, ui) { ... } }); Hopefully I am making sense :)

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• Custom UITableviewcell shows "fatal error: Can't unwrap Optional.None" issue in swift

  - by user1656286

  I need to load a custom cell in a UITableView. I created a custom subclass of UITableViewCell named "CustomTableViewCell". I have added a UITabelViewCell to the tableview (using drag and drop) as shown in figure. Then in file inspector I set the class of that UITabelViewCell to be "CustomTableViewCell". Here is my code: class ViewController: UIViewController,UITableViewDelegate,UITableViewDataSource { @IBOutlet var tableView : UITableView var items = String[]() override func viewDidLoad() { super.viewDidLoad() items = ["Hi","Hello","How"] self.tableView.registerClass(CustomTableViewCell.self, forCellReuseIdentifier: "CusTomCell") // Do any additional setup after loading the view, typically from a nib. } func tableView(tableView: UITableView!, numberOfRowsInSection section: Int) -> Int{ return items.count } func tableView(tableView: UITableView!, cellForRowAtIndexPath indexPath: NSIndexPath!) -> UITableViewCell!{ var cell:CustomTableViewCell = self.tableView.dequeueReusableCellWithIdentifier("CusTomCell") as CustomTableViewCell cell.labelTitle.text = items[indexPath.row] return cell; } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } } When I run my code, I get the following error: "fatal error: Can't unwrap Optional.None" as seen in the image.

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• Nested ComboBox doesn't update source by selection.

  - by Shimmy

  Hello. I am using a ComboBox bound under a DataContext: <tk:DataGridTemplateColumn.CellEditingTemplate> <DataTemplate> <ComboBox ItemsSource="{Binding Source={StaticResource CategoriesCollection}" DisplayMemberPath="Title" SelectedItem="{Binding Category}" /> </DataTemplate> </tk:DataGridTemplateColumn.CellEditingTemplate> When the row is initiated the value of Category is null. Once I select the first value in the ComboBox it sets it up. But when I select another value, it doesn't get changed.

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• updating dojo grid cell values in the server

  - by Raj

  I am using dojo datagrid to display my data. When the end user edit the cell values it should be updated in the server using ajax calls(when the focus goes out of the cell). Else, I should have a Edit & update/cancel buttons for each row to handle the same feature. But I don know how to place edit & update buttons inside the grid and capture their events. By default dojo updates only local the store value(client side). how can I save the updated cell values into the server? do we need to write any override methods to do so?? I am new to dojo. Any detailed explanation or sample codes would be much appreciated. Could anyone lend a hand to solve this issue?? Thank you Regards, Raj

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• load images dynamically on scroll in blackberry

  - by Maneesh

  How to display images in the form of pages where only one page is displayed at a time on blackberry screen. On scrolling down subsequent images will load at run time. So that loading of images do not consume time at startup. Edit: I am using loadimage function which loads images from blackberry device memory which loads images from specified path and resizing them.As number of images increases, it increases the startup time during opening of window.There is an in-built application(Media) in blackberry phone, where images load without taking any extra time. My idea is to display particular number of images which fit to the blackberry screen. As user scroll down to bottom of screen, application will then load and display more images. So my question is how to detect when user reached to bottom of blackberry screen and display one more row images.

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• Visual Studio 2008 Crashes When Opening Project Properties

  - by Joseph Sturtevant

  I have a multi-project .NET application which I am developing in Visual Studio 2008. If I try to open the project properties for one of my projects (to change settings or publish) Visual Studio immediately closes. There is no prompt to send a report to Microsoft, and two consecutive errors logged in the Event Viewer: .NET Runtime version 2.0.50727.3053 - Fatal Execution Engine Error (7A035E00) (80131506) .NET Runtime version 2.0.50727.3053 - Fatal Execution Engine Error (7A2E0F92) (0) If I delete all the .user and .suo files in my solution, I can once again publish and access project properties. The error, however, returns over time. This seems to suggest that the .suo or .user files are getting corrupted by Visual Studio. Has anyone else had this issue or know how to fix the problem?

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• EXEC_BAD_ACCESS in UITableView cellForRowAtIndexPath

  - by David van Dugteren

  My UITable is returning EXEC_BAD_ACCESS, but why! See this code snippet! Loading the UITableView works fine, so allXYZArray != nil and is populated! Then scrolling the tableview to the bottom and back up causes it to crash, as it goes to reload the method cellForRowAtIndexPath It fails on line: "NSLog(@"allXYZArray::count: %i", [allXYZArray count]);" - (UITableViewCell *)tableView:(UITableView *)theTableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"CellIdentifier"; UITableViewCell *cell = [theTableView dequeueReusableCellWithIdentifier:CellIdentifier]; cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; @try { if (allAdviceArray == nil) { NSLog(@"nil"); allXYZArray = [ToolBox getMergedSortedDictionaries:allXYZGiven SecondDictionary:allXYZSought]; } NSLog(@"%i", [indexPath row]); NSLog(@"allXYZArray::count: %i", [allXYZArray count]);

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• Linux shared library that uses a shared library undefined symbol

  - by johnnycrash

  two shared libraries liba.so and libb.so. liba.so uses libb.so. All c files are compiled with -fPIC. Linking uses -shared. When we call dlopen on liba.so it cannot find symbols in libb.so...we get the "undefined symbol" error. We can dlopen libb.so with no errors. We know that liba is finding libb because we don't get a file not found error. We get a file not found error when we delete libb.so. We tried -lutil and no luck. Any ideas???? oh yeah. gcc 4.1.2

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• Ext RowEditor.js does not fire 'afteredit' event

  - by terrani

  Hi, I have a Ext grid with RowEditor plugin. I have the following code to add 'afteredit' event to the roweditor object. store.on('update',function(){ }); editor.on("afteredit",function(roweditor,changes,record,index){ $.ajax({ url: $("#web").val() + "/registration/client/address-save" ,type: 'post' ,data: record.json ,dataType: 'json' ,success: function(data){ if(data.success == true){ alert("Update Successfully"); } } }); }); when I click a row and edit a value, sometimes the grid fires 'afteredit' event, but sometimes it doesn't. Do I have a problem with my code above?

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• boost pool_alloc

  - by mr grumpy

  Why is the boost::fast_pool_allocator built on top of a singleton pool, and not a separate pool per allocator instance? Or to put it another way, why only provide that, and not the option of having a pool per allocator? Would having that be a bad idea? I have a class that internally uses about 10 different boost::unordered_map types. If I'd used the std::allocator then all the memory would go back to the system when it called delete, whereas now I have to call release_memory on many different allocator types at some point. Would I be stupid to roll my own allocator that uses pool instead of singleton_pool? thanks

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