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  • How to store data in a table locally and present it in C#

    - by joslinm
    I want to setup a table that can: Save the data on the user's machine Reference & present the data in the GUI Capable of adding rows dynamically during runtime What's the best way to go about this? DataGridView or TableLayoutPanel or...? I'm having trouble with SQL server CE, as I was going to connect it with the DataGridView, but I'm very new to this kind of work, and wondered if it was even necessary to use SQL.

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  • what is this operator called and what is it used for <=>

    - by Scott
    I recently came across this magical operator when digging into Groovy: <= Groovy has really made me happy with elvis operators ?. and ?: which I use constantly now and very much wish were in Java. With this new operator, I have only found this reference. It seems to make comparators much easier. My question is how does it handle null values and how does it compare non Comparable object. Does this operator have a name, I couldn't find it Googling.

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  • Why can't i define recursive variable in code block?

    - by senia
    Why can't i define a variable recursively in a code block? scala> { | val fibs: Stream[Int] = 1 #:: fibs.scanLeft(1){_ + _} | } <console>:9: error: forward reference extends over definition of value fibs val fibs: Stream[Int] = 1 #:: fibs.scanLeft(1){_ + _} ^ scala> val fibs: Stream[Int] = 1 #:: fibs.scanLeft(1){_ + _} fibs: Stream[Int] = Stream(1, ?) lazy keyword solves this problem, but i can't understand why it works without a code block but throws a compilation error in a code block.

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  • Git: Find duplicate blobs (files) in this tree

    - by Readonly
    This is sort of a follow-up to this question. If there are multiple blobs with the same contents, they are only stored once in the git repository because their SHA-1's will be identical. How would one go about finding all duplicate files for a given tree? Would you have to walk the tree and look for duplicate hashes, or does git provide backlinks from each blob to all files in a tree that reference it?

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  • Why are some programs writing on stderr instead of stdout their output?

    - by Zagorax
    I've recently added to my .bashrc file an ssh-add command. I found that ssh-add $HOME/.ssh/id_rsa_github > /dev/null results on a message "identity added and something else" every time I open a shell. While ssh-add $HOME/.ssh/id_rsa_github > /dev/null 2>&1 did the trick and my shell is now 'clean'. Reading on internet, I found that other command do it, (for example time). Could you please explain why it's done?

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  • Overloading + to add two pointers

    - by iAdam
    I have a String class and I want to overload + to add two String* pointers. something like this doesn't work: String* operator+(String* s1, String* s2); Is there any way to avoid passing by reference. Consider this example: String* s1 = new String("Hello"); String* s2 = new String("World"); String* s3 = s1 + s2; I need this kind of addition to work. Please suggest.

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  • How to make a link button visible after another button has been clicked in asp.net(vb) in button_c

    - by Parth
    How to make a link button visible after another button has been clicked in asp.net(vb) in button_click() it says error as "Object reference not set to an instance of an object." i've done this in my code Protected Sub InsertButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Dim receipt As LinkButton = FormView1.FindControl("LinkButton1") ' receipt.Enabled = "true" ' receipt.EnableTheming = "true" ' receipt.EnableViewState = "true" receipt.Visible = "true" End Sub

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  • Errors in c++ faq lite?

    - by Gianluca
    Hello, I'm reading questions and answers around here for a few days. I have seen the c++ faq lite at Parashift has been mentioned many times. Personally I have always considered it to be a good reference, not my favourite one but certainly useful. Here I have seen somebody advising it, but many others commenting against it instead. Somebody mentioned it's full of mistakes. Could you please point out which are the major errors in there, if any?

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  • Updating data source on multiple pivot tables within Excel

    - by phrenetic
    Is there an easy way to update the data source for multiple pivot tables on a single Excel sheet at the same time? All of the pivot tables reference the same named range, but I need to create a second worksheet that has the same pivot tables, but accessing a different named range. Ideally I would like to be able to do some kind of search and replace operation (like you can do on formulae), rather than updating each individual pivot table by hand. Any suggestions?

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  • javascript, jQuery: how to save values instead of the references

    - by Patrick
    hi, I'm using the following lines to store the location of an object. var lightboxTop = $('#lightbox').css('top'); var lightboxLeft = $('#lightbox').css(' left'); I'm successively moving this object in my element, and I want to restore it previous position with the stored variables. But, I'm afraid javascript is saving the values by reference so I lose the initial positions. Am I correct ? How can I solve this ? thanks

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  • Can't get the new 2009 XAML primitives working, why?

    - by Will
    What I'd like to use: 2009 XAML primitives How it would be nice to use them: <sapv:ExpressionTextBox xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" ExpressionType="x:String" /> What actually happens: "Type reference cannot find the public type named String" The examples I see don't have updated namespaces. I tried 2009 and 2010, but to no avail. This is in VS 2010 RTM. What am I doing wrong?

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  • What are you supposed to do with old SVN branches?

    - by John
    We had a SVN branch recently that had been merged back to trunk, and some more work on that feature/functional area was needed. I suggested using the same branch but was told you shouldn't re-use a branch once it has been integrated into trunk (a reference in SVN docs was given, I can't find it now). That suggests a branch is fairly useless once you merge back to trunk, so my question is once a branch is no longer needed, should it simply be deleted or kept?

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  • JPA polymorphic oneToMany

    - by bob
    I couldn't figure out how to cleanly do a tag cloud with JPA where each db entity can have many tags. E.g Post can have 0 or more Tags User can have 0 or more Tags Is there a better way in JPA than having to make all the entities subclass something like Taggable abstract class? Where a a Tag entity would reference many Taggables. thank you

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  • Default FileField names for Django files

    - by Adam Nelson
    I have a model: class Example(models.Model): unique_hash = models.CharField(max_length=32,unique=True) content = models.FileField(upload_to='source',blank=True,verbose_name="HTML Content File") I would like to be able to set the content filename to default to a callable, but I don't see any way to have the callable reference unique_hash (or vice versa). Is this possible?

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  • Convert dependencies to point to View instead of Table

    - by jwarzech
    I currently have a SQL Server 2008 database in which I am planning to separate out some tables to other databases. I want to be able to replace all references to the separated tables from the original database using views. Is there a better way (other than manually changing all FK and SProc references) to switch all the dependencies to reference the view instead of the table?

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  • How does lock(syncRoot) make sense on a static method?

    - by Rising Star
    The following code is excerpted from the (Windows Identity Foundation SDK) template that MS uses to create a new Security Token Service Web Site. public static CustomSecurityTokenServiceConfiguration Current { get { HttpApplicationState httpAppState = HttpContext.Current.Application; CustomSecurityTokenServiceConfiguration customConfiguration = httpAppState.Get( CustomSecurityTokenServiceConfigurationKey ) as CustomSecurityTokenServiceConfiguration; if ( customConfiguration == null ) { lock ( syncRoot ) { customConfiguration = httpAppState.Get( CustomSecurityTokenServiceConfigurationKey ) as CustomSecurityTokenServiceConfiguration; if ( customConfiguration == null ) { customConfiguration = new CustomSecurityTokenServiceConfiguration(); httpAppState.Add( CustomSecurityTokenServiceConfigurationKey, customConfiguration ); } } } return customConfiguration; } } I'm relatively new to multi-threaded programming. I assume that the reason for the lock statement is to make this code thread-safe in the event that two web requests arrive at the web site at the same time. However, I would have thought that using lock (syncRoot) would not make sense because syncRoot refers to the current instance that this method is operating on... but this is a static method? How does this make sense?

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