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• iPhone: TabBarController as second level of Navigation Controller

  - by Nebs

  I'm new to iphone development. I've read tutorials about implementing a tab bar controller on the window (eg as the main controller for the app). But how can I create a tab bar controller as a 'standalone' UIViewController that can be called by a navigation bar controller? Basically my navigation bar controller has an array of UIViewControllers that it displays in the table and then loads the appropriate view/controller when a user selects an item. Now I want one of these loaded views/controllers to be a tab bar controller. How can I do this? I'm not sure how to create a tab bar controller on its own without having an outlet/instance in the application delegate. Hope that made sense. Thanks.

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• Extra characters Extracted with XPath and Python (html)

  - by Nacari

  I have been using XPath with scrapy to extract text from html tags online, but when I do I get extra characters attached. An example is trying to extract a number, like "204" from a <td> tag and getting [u'204']. In some cases its much worse. For instance trying to extract "1 - Mathoverflow" and instead getting [u'\r\n\t\t 1 \u2013 MathOverflow\r\n\t\t ']. Is there a way to prevent this, or trim the strings so that the extra characters arent a part of the string? (using items to store the data). It looks like it has something to do with formatting, so how do I get xpath to not pick up that stuff?

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• javascript inherance? with Private vars and methods too

  - by Totty

  Hy i need to inherent a class from another. Parent has private var "_data" and private method "_test" and public method "add" Now the child have a public method "add", that uses the private method from the parent "_test" and the private var "_data". How do i do this? var Parent = function(){ var _data = {}; var _test = function(){alert('test')}; this.add = function(){alert('add from parent')} } var Child = function(){ this.add = function(){// here uses the _data and _test from the Parent class alert('add from child') } } // something to inherent Child from Parent // instance Child and use the add method And i think im miss the prototype concept (http://stackoverflow.com/questions/892467/javascript-inheritance)

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• C#.NET : A graphical control makes my app freeze after workstation unlock

  - by leo

  Hi, I have a graphical control that is multithreaded. Until now it worked fine, but I just noticed that whenever I'm on my application showing this control the following happens: if I lock and unlock my workstation, it freezes, like if it were in some kind of infinite loop. Even stranger, this bug occurs only when I'm not lauching the app from Visual Studio, and not attached to it. Does anyone have a clue on what's happening? For instance, if I attach Visual Studio to the already freezed app, can I see which lines of code my threads are executing ? Any help will be appreciated!

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• AsyncTask Threading Rule - Can it really only be used once?

  - by stormin986

  In the documentation on AsyncTask it gives the following as a rule related to threading: The task can be executed only once (an exception will be thrown if a second execution is attempted.) All this means is that you have to create a new instance of the class every time you want to use it, right? In other words, it must be done like this: new DownloadFilesTask().execute(url1, url2, url3); new DownloadFilesTask().execute(url4, url5, url6); Or conversely, you can NOT do the following: DownloadFilesTask dfTask = new DownloadFilesTask(); dfTask().execute(url1, url2, url3); dfTask().execute(url4, url5, url6); Can someone verify this is an accurate interpretation? I realize I pretty much just answered this for myself as I was typing this out... But it wasn't immediately obvious to me so I think this would be useful to have posted nonetheless.

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• Different actions on multiple Keydown event

  - by Billy Mitchell

  Okay, so my question (im hoping) is fairly simple. I want to know what to do so that I can create different events for the same keycode. For instance Id like to fade out a div and fade a new one in on the first keypress, then fade that one out and fade a new one in on keypress. Thanks! $(document).keydown(function() { if (event.keyCode == '40') { $('.div-1').fadeOut("slow") $('.div-2').fadeIn("slow") // I'd like this event to occur on the Second keydown $('.div-2').fadeOut("slow") $('.div-3').fadeIn("slow") } });

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• How do I put the table headers above the table cells if they are in the same table row?

  - by James Skidmore

  I have a table like this: <table> <tr> <th>Header</th> <td>Content</td> </tr> <tr> <th>Header</th> <td>Content</td> </tr> </table> How can I make the header actually float above the content cell without putting everything on a separate row? For instance: Header Content Header Content

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• What issues carry the highest risk in a software project?

  - by Mehrdad Afshari

  Clearly, software projects are different from other industries in terms of many things like for instance, quality assurance, project progress measurement, and many other things. Unique characteristics of software projects also makes the risk management process unique. Lots of issues in a project might lead it to unacceptable delay or failure to deliver business value. They might even make a complete disaster in the project. What are the deadliest risk factors in a software project? How to analyze, prevent and handle them? Particularly, I'm interested in the issues that you can detect from the beginning and you should keep an eye on (for example, you might be told about a third-party API that the current application uses and lacks documentation). Please share your experiences if they are relevant.

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• Dynamically Loading a DLL

  - by TooFat

  I am trying to simply load a dll written in C# at run time and create an instance of a class in that dll. Assembly a = Assembly.LoadFrom(@"C:\Development\DaDll.dll"); Type type = a.GetType("FileReleaseHandler", true); TestInterface.INeeedHelp handler = Activator.CreateInstance(type) as TestInterface.INeeedHelp; No errors are thrown, and if I step through the code I can walk though the FileReleaseHandler Class as it executes the constructor but the value of handler is always null. What am I missing here? or even is there a better way I should be going about this?

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• InnoDB not supported by webhost. What now?

  - by Peter Perhác

  I was developing a small WAMP web application on my laptop, where I have an instance of mySQL running and I chose InnoDB for my DB engine. After several weeks' development I wanted to make it available to the public and found out the database server provided by my web host does not support InnoDB, only MyISAM. The create-and-populate script generated from the innoDB schema on my laptop, when executed against the live database, can manage to create individual TABLES but then runs into problems creating the VIEWs. Are views not supported in MyISAM? I know FOREIGN KEYs are not. That's very much why I made the choice of InnoDB... What are my chances of making my innoDB schema design work with myISAM? Is there any straightforward way of converting the whole schema from one storage engine to the other? Should I look for another web host that does provide a mysql db that supports innoDB?

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• vb.net : is it possible to connect to sql server 2008 via odbc but not through vb.net code?

  - by phill

  I'm supporting an old vb.net program whose database it connected to was moved from SQL Server 2005 to SQL Server 2008. Is there a setting on SQL Server 2008 which will allow ODBC connections to access the database but not allow VB.NET to connect to it programmatically? the error i keep receiving in the app is: An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 – Could not open a connection to SQL Server) however I can connect to it when I create a system dsn to the sql server instance and through VS2005's Tools Connect to Database. Here is the code I'm using to connect: dim strC as string strC = "data source=bob; database=subscribers; user id=bobuser; password=passme" dim connection as New SqlClient.SqlConnection(strC) try connection.open() catch ex as Exception msgbox(ex.message) end try connection.Close()

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• How can I listen for the deletion of a ProjectItem via DTE?

  - by Will

  I've got a designer that relies on the existence of other solution items. If one of those items is deleted the designer crashes and you have to edit as XML to fix. Not exactly user friendly. I do, however, have the DTE object representing the instance of Visual Studio, as well as the ProjectItems I am dependent on. Is it possible to, somewhere in the depths of the DTE, register a listener for the deletion of that ProjectItem? And, if so, How would I do it?

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• Default Arguments in Matlab

  - by Scott

  Hello. Is it possible to have default arguments in Matlab? For instance, here: function wave(a,b,n,k,T,f,flag,fTrue=inline('0')) I would like to have the true solution be an optional argument to the wave function. If it is possible, can anyone demonstrate the proper way to do this? Currently, I am trying what I posted above and I get: ??? Error: File: wave.m Line: 1 Column: 37 The expression to the left of the equals sign is not a valid target for an assignment. Thanks!

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• Drupal Webforms module - Form results say "Array" instead of form values

  - by Doc Falken

  I have a simple form built with the Webforms module in Drupal. The standard textfield form fields work perfectly. However if I use the preset date or time form values, they don't get emailed properly when the form is submitted. For instance, if there was a date field in my form, it would submit fine and render on the results page just fine, but if I wanted that value to be included in an email, it would show up as "Array" within the text of the email instead of showing the date. There is an open support issue within the module issues page, but I'm hoping for any additional help.

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• Where do current (not HTML5) browsers stand on clipboard support for non-text data?

  - by John

  I don't really know where the line is between the browser itself and HTML/JS here. But let's say I want to write a web-app where I can copy a chunk of data from MSPaint (select, CTRL+c) and paste it into a web-page in some way... ultimately the point is the data goes to the server without me having to save it as a file first. Where are the problems here - browsers or client-side technologies? For instance if JS can't do it, could Flex/Silverlight? Advice on future technology welcome, but doesn't really answer the question - where are we right now with IE/FF/Chrome and JS/Flex/SL?

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• my .jar file won't do anything.

  - by David

  I created a program that more or less holds an array of strings as an object and randomly prints one. so basicaly class Happy { string[] namestrings = new string[#] constructor() { fill with some strings} public static void main (String[]arg) { create instance of class do some junk with it method that prints it } method that prints it {} another method } when i compile and run it on the command line it works fine but when on the comand line i type in jar -cf Happy.jar Fun.class i get a .jar file called Happy and when i click on it i get an error message that reads "the java Jar file happy could not be launched read the consol for possible error messages" I have a mac i'm running lepord if that makes a diference. Whats going on?

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• about the post_save signal and created argument

  - by panchicore

  the docs says: post_save django.db.models.signals.post_save created A boolean; True if a -new- record was create. and I have this: from django.db.models.signals import post_save def handle_new_user(sender, instance, created, **kwargs): print "--------> save() "+str(created) post_save.connect(handle_new_user, sender=User) when I do in shell: u = User(username="cat") u.save() >>> --------> save() True u.username = "dog" u.save() >>> --------> save() True I expect a -------- save() False when I save() the second time because is an update? not?

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• When to release a class with delegates

  - by Stefan Mayr

  A quick question to delegates. Lets say, CLASSA has a delegate defined: @protocol MyDelegate -(void) didFinishUploading; @end In CLASSB I create an instance of CLASS A -(void) doPost { CLASSA *uploader = [[CLASSA alloc] init]; uploader.delegate = self; // this means CLASSB has to implement the delegate uploader.post; } and also in CLASSB: -(void)didFinishUploding { } So when do I have to release the uploader? Because when I release it in doPost, it is not valid anymore in didFinishUploading. Thanks

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• Using ActiveRecord::Base.transaction in a rake task?

  - by Brian Jordan

  I am writing a rake task which, at one point, uses a custom YAML file import method to seed the database. At one point in the import code, I have: ActiveRecord::Base.transaction do Trying to run the rake task throws: You have a nil object when you didn't expect it! You might have expected an instance of ActiveRecord::Base. The error occurred while evaluating nil.[] The stack trace points to the aforementioned line in the code. Is there a way to instantiate ActiveRecord::Base during a rake task? Thanks!

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• how to deploy web application directly from git master branch

  - by mobile.linkr

  For educational purpose, I am writing a server instance in GCE(google compute engine) to serve a few web apps mostly (to be) written in Dart and Polymer. My workflow is, when my students log-in the server above, they will automatically fork those web apps into their own registries in their own server instances for further development. My issues are, How to serve web applications(they are git registries as well) in GCE like Github Pages? Is it possible to manipulate Github Pages to serve web apps mostly using Dart and Polymer packages? Thanks in advance.

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• Remove adjacent identical elements in a Ruby Array?

  - by Mike Woodhouse

  Ruby 1.8.6 I have an array containing numerical values. I want to reduce it such that sequences of the same value are reduced to a single instance of that value. So I want a = [1, 1, 1, 2, 2, 3, 3, 3, 3, 2, 2, 2, 3, 3, 3] to reduce to [1, 2, 3, 2, 3] As you can see, Array#uniq won't work in this case. I have the following, which works: (a.size - 1).downto(1) { |i| a[i] = nil if a[i - 1] == a[i] } Can anyone come up with something less ugly?

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• What's wrong in this SELECT statement

  - by user522211

  Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load Dim SQLData As New System.Data.SqlClient.SqlConnection("Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\Database.mdf;Integrated Security=True;User Instance=True") Dim cmdSelect As New System.Data.SqlClient.SqlCommand("SELECT * FROM Table1 WHERE Seats ='" & TextBox1.Text & "'", SQLData) SQLData.Open() Using adapter As New SqlDataAdapter(cmdSelect) Using table As New Data.DataTable() adapter.Fill(table) TextBox1.Text = [String].Join(", ", table.AsEnumerable().[Select](Function(r) r.Field(Of Integer)("seat_select"))) End Using End Using SQLData.Close() End Sub This line will be highlighted with blue line: TextBox1.Text = [String].Join(", ", table.AsEnumerable().[Select](Function(r) r.Field(Of Integer)("seat_select")))

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• Facebook photo additions showing as separate / individual posts

  - by user1143693

  When posting additional photos to an existing Facebook album, each individual photo is being displayed on the mobile Facebook view as a separate post. Desktop display still groups them (correctly) into 1 album and shows as a single post. For instance, if I add 20 photos to an album, the people who have liked my page will see 20 individual posts in their feed from my account on their mobile devices. This has been happening for about 2 weeks now as far as I've noticed. My upload process has not changed. I should note that I've noticed this behavior by uploading via Lightroom as well as through the direct Facebook interface. Has anyone else experienced this? Did something change that I am not aware of? Thanks.

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• MessageContract serialization with DCS

  - by kurtaj

  Is there a way to make the DataContractSerializer serialize a [MessageContract] the same way it appears when transmitted over SOAP? I have a class that appears as follows on the wire for a WCF call: <TestRequest xmlns="http://webservices.test.com/ServiceTest/1.1"> <Name>Just Me</Name> </TestRequest> When serializing using the DCS, it looks like this: <TestRequest xmlns:i="http://www.w3.org/2001/XMLSchema-instance" z:Id="1" xmlns:z="http://schemas.microsoft.com/2003/10/Serialization/" xmlns="http://schemas.datacontract.org/2004/07/ServiceTest"> <_x003C_Name_x003E_k__BackingField z:Id="2">Just Me</_x003C_Name_x003E_k__BackingField> </TestRequest> I'm convinced this inconsistency is because my class is marked up as a message contract instead of a data contract: [MessageContract] [Serializable] public class TestRequest { [MessageBodyMember] public string Name { get; set; } } Is there a way to make the DCS serialize messages the same way WCF does when it creates a SOAP message?

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• Best method for Binding ComboBox

  - by LnDCobra

  I am going to be developing a large project which will include a large number of ComboBoxes. Most of these combo boxes will be bound to a database field which is a related to another daataset/table. For instance. I have the following 2 tables: Company {CompanyID, CompanyName, MainContact} Contacts {ContactID, ContactName} And when the user clicks to edit a company, A TextBox will be there to edit a company name, but also a ComboBox will be there. The way I am currently doing it is binding the ComboBox to the Contacts dataset, and manually updating the Company MainContact field in code behind. Is there anyway for me to bind the selected item to the Company MainContact field in XAML and the items to the ContactName and eliminate the code behind? Reason for this is when you start making 100's combo boxes all over the application it gets long winded each time creating code behind to do the update.

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