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Unable to cast object of type 'System.DBNull' to type 'System.String`
I got the above error in my app. Here is the original code
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How to kill a child process after a given timeout in Bash?
I have a bash script that launches a child process that crashes (actually, hangs) from time to time and with no apparent reason (closed source, so there isn't much I can do about it). As a result, I would like to be able to launch this process for a given amount of time, and kill it if it did not re...
How to Concatenate Numbers and Strings to Format Numbers in T-SQL?
I have the following function
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Is it better to call ToList() or ToArray() in LINQ queries?
I often run into the case where I want to eval a query right where I declare it. This is usually because I need to iterate over it multiple times and it is expensive to compute. For example:
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.keyCode vs. .which
...e your decision. Be aware that this feature may cease to work at any tim
https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/keyCode
Instead use either: .key or .code depending on what behavior you want:
https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/code
https://devel...
SQL Server - Return value after INSERT
... value
INSERT INTO table (name) VALUES('bob');
SELECT SCOPE_IDENTITY()
http://msdn.microsoft.com/en-us/library/ms190315.aspx
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How to initialize const member variable in a class?
When I am trying to initialize the const member variable t with 100. But it's giving me the following error:
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Apply a function to every row of a matrix or a data frame
Suppose I have a n by 2 matrix and a function that takes a 2-vector as one of its arguments. I would like to apply the function to each row of the matrix and get a n-vector. How to do this in R?
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Null check in an enhanced for loop
What is the best way to guard against null in a for loop in Java?
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How do I use a custom deleter with a std::unique_ptr member?
I have a class with a unique_ptr member.
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