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is there a Java equivalent to null coalescing operator (??) in C#? [duplicate]
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Guava has a method that does something similar called MoreObjects.firstNonNull(T,T).
Integer x = ...
int y = MoreObjects.firstNonNull(x, -1);
This is more helpful when you have something like
int y = firstNonNull(calculateNullableValue(), -1);
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Group vs role (Any real difference?)
...get to assign yourself (or others) to roles. A role admin or role engineer does that.
This is superficially similar to UNIX groups where a user can/might be able to assign himself to a group (via sudo of course.) When groups are assigned according to a security engineering process, the distinction...
Deserialize JSON into C# dynamic object?
...t? I can't do obj.background-color, of course, and obj["background-color"] doesn't seem to work. It would be nice if the dynamic object could also be accessed as a dictionary, at the same time, exactly like in js.
– Radu Simionescu
Sep 28 '12 at 11:59
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Difference between `constexpr` and `const`
...s, not functions in general. It gives a guarantee that the member function does not modify any of the non-static data members (except for mutable data members, which can be modified anyway).
constexpr can be used with both member and non-member functions, as well as constructors. It declares the fu...
No generic implementation of OrderedDictionary?
There doesn't appear to be a generic implementation of OrderedDictionary (which is in the System.Collections.Specialized namespace) in .NET 3.5. Is there one that I'm missing?
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How to delete a workspace in Eclipse?
...> Startup & Shudown > Workspaces > [Remove] ). Note that this does not remove the files itself. For old versions of Eclipse you will need to edit the org.eclipse.ui.ide.prefs file in the configuration/.settings directory under your installation directory (or in ~/.eclipse on Unix, IIRC)...
putting datepicker() on dynamically created elements - JQuery/JQueryUI
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Make sure your element with the .date-picker class does NOT already have a hasDatepicker class. If it does, even an attempt to re-initialize with $myDatepicker.datepicker(); will fail! Instead you need to do...
$myDatepicker.removeClass('hasDatepicker').datepicker();
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Why was the switch statement designed to need a break?
...ontrol structure", and a jump out requires an explicit instruction.
So, c does the same thing...
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How to get UTC time in Python?
I've search a bunch on StackExchange for a solution but nothing does quite what I need. In JavaScript, I'm using the following to calculate UTC time since Jan 1st 1970:
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Rounding a double to turn it into an int (java)
... the cast is not necessary. I'm not aware if it was in the past, but round does return int.
– Dropout
May 18 '18 at 9:22
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