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• Dynamically add a new row as Add in UITableView in edit mode?

  - by David.Chu.ca

  I have a table view with 0 or n rows of data from datastore. I added a customized Edit button on the right of the view's navigation bar. By default, when the edit button is clicked, in the action event, I set the view as edit mode: [self.tableView setEditing:YES animated:YES]; I would like to add a row at the end of the table view with Add…

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• Is stringByTrimmingCharactersInSet: an autoreleased string?

  - by David.Chu.ca

  I can use the following codes to trim a string: -(void) aMethod { // myStr from a text box NSString *trimedStr = [mystr stringByTrimmingCharactersInSet: [NSCharacterSet whitespaceAndNewlineCharacterSet]]; ... // should I release trimedStr? } Not sure if the result trimedStr is an autorelease string? How can I find out that?

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• Local Data Cache - How do I refresh the local db when I add fields to remote db?

  - by Chu

  I'm using a Local Data Cache in an ASP.NET 3.5 environment. I made a change in my main database by adding a new field. I double click on my .SYNC file in my project to startup the Local Data Cache wizard again. The wizard starts and I click OK with the hopes that it'll re-query my database and add the new field to the local database file. …

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• Navigation Within TabController

  - by David.Chu.ca

  I am trying to use UITabController as may controller in my main window and add navigation controllers to some tab bar items. For example, the first tab has a navigation controller with table view: ![alt text][1] The SettingsViewController is associated with its own NIB file, where a table view is defined. Within that xib file, I have a…

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• Get remote PC's date time?

  - by David.Chu.ca

  Is there any class available to get a remote PC's date time in .net? In order to do it, I can use a computer name or time zone. For each case, are there different ways to get the current date time? I am using Visual Studio 2005.

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• DataGridView: Scroll bar does not refreshed

  - by David.Chu.ca

  I am working (fixing bugs) on a project which was written in VS 2005. There is one DataGridView control on a form. When it is first time loaded, the control's data grid is populated with rows of data from a collection manually or in codes. Actually, there is method PopulateDataGrid() do the job. There is also another control on the…

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• LINQ to Entity: using Contains in the "select" portion throws unexpected error

  - by Chu

  I've got a LINQ query going against an Entity Framework object. Here's a summary of the query: //a list of my allies List<int> allianceMembers = new List<int>() { 1,5,10 }; //query for fleets in my area, including any allies (and mark them as such) var fleets = from af in FleetSource select new Fleet …

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• Get Windows Last Reboot Timestamp?

  - by David.Chu.ca

  I have a PC on remote connected by network, but it occasionally crashes or is restarted by remote users. After the restart, some services and applications have to be in running status. So I would like to find out the reboot as soon as possible. I think PS may be a good choice with some scripts so that I could make remote call to get…

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• CoreData: Sort and Section on Relationships

  - by David.Chu.ca

  I have two questions about using Core Data. Taking the typical case of Employee and Department as an example. The Employee entity has a relationship field "deparment" as to-one to Department, and the Department entity has a relationship "employee" as to-many to Employee entity. I would like to display all the employees in a…

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• Delete NSManageObject at the event tableView:commiteEditingStyle:forRowAtIndexPath:

  - by David.Chu.ca

  I got exception when I tried to delete one NSManageObject at the event of tableView:commiteEditingStyle:forRowAtIndexPath:. Here is the part of my codes: - (void)tableView:(..)tableView commitEditingStyle:(..)editingStyle forRowAtIndexPath:(..)indexPath { if (editingStyle == UITableViewCellEditingStyleDelete) { …

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• Xcode: view references for a variable?

  - by David.Chu.ca

  I am new to Xcode. I am not sure if there is a way to view a variable's references just like "Find all references" in Visual Studio by right click on a var? For example, in my .h file, I would like to know or view all the references for property isSet: @interface MyInterface { ... BOOL isSet; // view all…

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• Convert codes to HTML with CSS style

  - by David.Chu.ca

  I normally use VIM to edit my codes and convert them to HTML by using TOhtml command. The only thing I don't like is that the converted HTML does not have css class style definitions. I am not sure if there is tool to convert codes to HTML with css, or I can use additional tool or command to convert HTML HTML…

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• Ruby proc vs lambda in initialize()

  - by Jimmy Chu

  I found out this morning that proc.new works in a class initialize method, but not lambda. Concretely, I mean: class TestClass attr_reader :proc, :lambda def initialize @proc = Proc.new {puts "Hello from Proc"} @lambda = lambda {puts "Hello from lambda"} end end c = TestClass.new…

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• Anyway to find out the current Windows is in lock mode?

  - by David.Chu.ca

  I have a windows application written in VS 2005. The application makes queries against to sql database in a timer cycle every 2 minutes. If there any data changes, the window will be refreshed with new data. If the user leaves the window, the windows will be automatically locked after a while.…

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• Why Solr admin query page interprets UTF-8 as ISO-8859-1

  - by Scott Chu

  I deploy a war to my Tomcat 6.0.35 on Win7 64bit and when I use full-interface query page (I mean form.jsp) in Solr Admin to query 2 Chinese character (say it's C1C2) , the debug info shows: <lst name="debug"> <str name="rawquerystring">æ°è</str> <str…

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• How to take NavigationBar's height into consideration when adjust text field views?

  - by David.Chu.ca

  I have a view with UINavigationBar on top. The view contains several text fields. Based on a tip to adjust UITextFieldView's position to the top of the view, I did some adjustment. However, my view has a navigation bar on top. How can I take the navigation bar's height into…

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• How to reset keyboard for an entry field?

  - by David.Chu.ca

  I am using tag field as a flag for text fields text view fields for auto-jumping to the next field: - (BOOL)findNextEntryFieldAsResponder:(UIControl *)field { BOOL retVal = NO; for (UIView* aView in mEntryFields) { if (aView.tag == (field.tag + 1)) { [aView…

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• Concurrent connections in C# socket

  - by Chu Mai

  There are three apps run at the same time, 2 clients and 1 server. The whole system should function as following: The client sends an serialized object to server then server receives that object as a stream, finally the another client get that stream from server and…

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• Linq to Entities (EF): How to get the value of a FK without doing the join

  - by Chu

  I'm using the Linq to Entities. I've got my main table, Employee setup with a field named vendorID. Vendor ID is a foreign key into the Vendors table. As it is right now, the Employee object does not directly expose the vendorID. Instead, I can only access it this…

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• SQL - Break a start/end time into 15 minute records

  - by Chu

  I've got a record set that consists of a start and end time in two separate fields: id - Int startTime - DateTime endTime - DateTime I'd like to find a way to query a record and return it as X records based on the number of 15 minute intervals found between the…

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• PS: Filter selected rows with only max values as output?

  - by David.Chu.ca

  I have a variable results ($result) of several rows of data or object like this: PS> $result | ft -auto; name value ---- ----- a 1 a 2 b 30 b 20 .... what I need to get all the rows of name and max(value) like this…

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• CGRect var as property value?

  - by David.Chu.ca

  CGRect type is a structure type. If I want to define a property as this type, should I use assign or retain attribute for this type? @interface MyClass { CGRect rect; ... } @property (nonatomic, assign) rect; // or retain?

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• How do I pick the most beneficial combination of items from a set of items?

  - by Chu

  I'm designing a piece of a game where the AI needs to determine which combination of armor will give the best overall stat bonus to the character. Each character will have about 10 stats, of which only 3-4 are important, and of those important ones, a few will…

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• April 30th Links: ASP.NET, ASP.NET MVC, Visual Studio 2010

  Here is the latest in my link-listing series. [In addition to blogging, I am also now using Twitter for quick updates and to share links. Follow me at: twitter.com/scottgu] ASP.NET Data Web Control Enhancements in ASP.NET 4.0: Scott…

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• April 30th Links: ASP.NET, ASP.NET MVC, Visual Studio 2010

  Here is the latest in my link-listing series. [In addition to blogging, I am also now using Twitter for quick updates and to share links. Follow me at: twitter.com/scottgu] ASP.NET Data Web Control Enhancements in ASP.NET 4.0: Scott…

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