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Nullable type issue with ?: Conditional Operator
... has been asked a bunch of times already. The compiler is telling you that it doesn't know how convert null into a DateTime.
The solution is simple:
DateTime? foo;
foo = true ? (DateTime?)null : new DateTime(0);
Note that Nullable<DateTime> can be written DateTime? which will save you a bu...
What are file descriptors, explained in simple terms?
... like (...100, 101, 102....). This entry number is the file descriptor.
So it is just an integer number that uniquely represents an opened file in operating system.
If your process opens 10 files then your Process table will have 10 entries for file descriptors.
Similarly when you open a network so...
Apply formula to the entire column
I'm trying to recode all the zip code from Column A into Column B with the formula:
10 Answers
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Where does the @Transactional annotation belong?
...place the @Transactional in the DAO classes and/or their methods or is it better to annotate the Service classes which are calling using the DAO objects? Or does it make sense to annotate both "layers"?
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C-like structures in Python
... a way to conveniently define a C-like structure in Python? I'm tired of writing stuff like:
25 Answers
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What is DOCTYPE?
...irks mode.
The kicker here is, that quirks mode in Internet Explorer is quite different from quirks mode in Firefox (and other browsers); meaning that you'll have a much harder job, trying to ensure your page renders consistently with all browsers if the quirks mode is triggered, than you will if i...
'ssh-keygen' is not recognized as an internal or external command
I run git push -u origin master
14 Answers
14
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When should I use Kruskal as opposed to Prim (and vice versa)?
I was wondering when one should use Prim's algorithm and when Kruskal's to find the minimum spanning tree? They both have easy logics, same worst cases, and only difference is implementation which might involve a bit different data structures. So what is the deciding factor?
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Disable ScrollView Programmatically?
I would like to enable ScrollView and disable it by a Button Click.
Disable means like if the ScrollView wasn't there.. and enable it returns the ScrollView.
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What's the main difference between int.Parse() and Convert.ToInt32
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If you've got a string, and you expect it to always be an integer (say, if some web service is handing you an integer in string format), you'd use Int32.Parse().
If you're collecting input from a user, you'd generally use Int32.TryParse(), since it allows you mor...