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Physical vs. logical / soft delete of database record?
...users username for new records. Working around this you could tack on a GUID to the deleted username column, but it's a very hacky workaround that I wouldn't recommend. Probably in that circumstance it would be better to just have a rule that once a username is used, it can never be replaced.)
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Sticky sidebar: stick to bottom when scrolling down, top when scrolling up
I have been looking for some time now for a solution to my sticky sidebar problem. I have a specific idea of how I would like it to act; effectively, I would like it to stick to the bottom as you scroll down, and then as soon as you scroll back up I would like it to stick to the top, in a fluid moti...
Copy rows from one Datatable to another DataTable?
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Try This
String matchString="ID0001"//assuming we have to find rows having key=ID0001
DataTable dtTarget = new DataTable();
dtTarget = dtSource.Clone();
DataRow[] rowsToCopy;
rowsToCopy = dtSource.Select("key='" + matchString + "'");
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How to handle AccessViolationException
...ine instead of entering the catch block. Additionally, if I run this outside of the visual studio my application crashes. How can I handle this exception that is thrown within the COM object?
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UIButton: set image for selected-highlighted state
...elected, but when the button in selected state and I press/highlight it I didn't see my highlighted image but just grayed picture.
Is it possible to set an image for highlighted state when the button selected?
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Xcode iOS 8 Keyboard types not supported
...TextField Ctrl-dragged as an @Outlet in my .swift class.
Now in viewDidLoad i'm using this code
10 Answers
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What is the difference between up-casting and down-casting with respect to class variable
...ing: When we want to cast a Sub class to Super class, we use Upcasting(or widening). It happens automatically, no need to do anything explicitly.
Downcasting : When we want to cast a Super class to Sub class, we use
Downcasting(or narrowing), and Downcasting is not directly possible in Java, expl...
What is the meaning of symbol $ in jQuery?
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By default, jQuery uses "$" as a shortcut for "jQuery"
So, using $("#id") or jQuery("#id") is the same.
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How can I use a local image as the base image with a dockerfile?
... image called ubuntu different from the official one, your image will override it.
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Error 1022 - Can't write; duplicate key in table
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The most likely you already have a constraint with the name iduser or idcategory in your database. Just rename the constraints if so.
Constraints must be unique for the entire database, not just for the specific table you are creating/altering.
To find out where the constraints are ...