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Why is a ConcurrentModificationException thrown and how to debug it

... (a HashMap used indirectly by the JPA, it so happens), but apparently randomly the code throws a ConcurrentModificationException . What is causing it and how do I fix this problem? By using some synchronization, perhaps? ...
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How do I put hint in a asp:textbox

...ibute. Attributes which are not registered with ASP.net are passed through and rendered as is. So the above code (basically) renders to: <input type="text" placeholder="hint"/> Using placeholder in resources A fine way of applying the hint to the control is using resources. This way you ma...
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Passing Parameters JavaFX FXML

... directly from the caller to the controller - it's simple, straightforward and requires no extra frameworks. For larger, more complicated applications, it would be worthwhile investigating if you want to use Dependency Injection or Event Bus mechanisms within your application. Passing Parameters Dir...
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Bootstrap combining rows (rowspan)

I am testing Twitter Bootstrap and got stuck with basic scaffolding with rows. I revisited their documentation number of times and I can see nesting columns where you can basically nest columns within a column but I cannot locate the capability of combining rows into one and have it aligned with ...
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.NET unique object identifier

...ing (GUID, integer, whatever). That would add a certain amount of overhead and complexity, however. share | improve this answer | follow | ...
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DateTime2 vs DateTime in SQL Server

...datetime2. Here is their recommendation: Use the time, date, datetime2 and datetimeoffset data types for new work. These types align with the SQL Standard. They are more portable. time, datetime2 and datetimeoffset provide more seconds precision. datetimeoffset provides time zone s...
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Is there a good reason to use upper case for SQL keywords? [closed]

...owercase with database object names MixedCase. It is much easier to read, and literals and comments stand out. share | improve this answer | follow | ...
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What is the best workaround for the WCF client `using` block issue?

...ng my WCF service clients within a using block as it's pretty much the standard way to use resources that implement IDisposable : ...
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Proper way to handle multiple forms on one page in Django

... 4) Add a hidden field identifying the form and check the value of this field in your view. – Soviut Jun 14 '11 at 3:40 ...
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Running unittest with typical test directory structure

... The best solution in my opinion is to use the unittest command line interface which will add the directory to the sys.path so you don't have to (done in the TestLoader class). For example for a directory structure like this: new_project ├── antigravity.py └── test_antig...