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What is the use of ObservableCollection in .net?
...ws code outside the collection be aware of when changes to the collection (add, move, remove) occur. It is used heavily in WPF and Silverlight but its use is not limited to there. Code can add event handlers to see when the collection has changed and then react through the event handler to do some...
Could not load file or assembly 'System.Web.Mvc'
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I just wrote a blog post addressing this. You could install ASP.NET MVC on your server OR you can follow the steps here.
EDIT: (by jcolebrand) I went through this link, then had the same issue as Victor below, so I suggest you also add these:
* M...
How do I add a library project to Android Studio?
How do I add a library project (such as Sherlock ABS) to Android Studio ?
30 Answers
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How can you undo the last git add?
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You can use git reset. This will 'unstage' all the files you've added after your last commit.
If you want to unstage only some files, use git reset -- <file 1> <file 2> <file n>.
Also it's possible to unstage some of the changes in files by using git reset -p.
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What to do about Eclipse's “No repository found containing: …” error messages?
I'm running Eclipse's Helios EE bundle on Linux to which I added the subversive plugins, the m2e Maven integration and the Mylin connector for Trac. For the last couple of weeks I've been trying to install updates, and every time I get back a message like
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Github “Updates were rejected because the remote contains work that you do not have locally.”
I created a new repo, cloned it, added files to the directory, added them with add -A , committed changes, and when I try to push using git push <repo name> master I get:
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Simple way to transpose columns and rows in SQL?
...ns table to generate the list of items to UNPIVOT and PIVOT. This is then added to a query string to be executed. The plus of the dynamic version is if you have a changing list of colors and/or names this will generate the list at run-time.
All three queries will produce the same result:
| NAME |...
Request failed: unacceptable content-type: text/html using AFNetworking 2.0
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This means that your server is sending "text/html" instead of the already supported types.
My solution was to add "text/html" to acceptableContentTypes set in AFURLResponseSerialization class. Just search for "acceptableContentTypes" and add @"text/html" to the set manually.
Of c...
CSS styling in Django forms
...r a completely custom rendering, this is clearly documented
-- EDIT 2 ---
Added a newer way to specify widget and attrs for a ModelForm.
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Why is extending native objects a bad practice?
Every JS opinion leader says that extending the native objects is a bad practice. But why? Do we get a perfomance hit? Do they fear that somebody does it "the wrong way", and adds enumerable types to Object , practically destroying all loops on any object?
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