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Do spurious wakeups in Java actually happen?
...ngroup.org/onlinepubs/7908799/xsh/… "These functions will not return an error code of [EINTR]."
– gub
Aug 11 '14 at 17:57
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Copying PostgreSQL database to another server
...d the database on the new machine (But blank) I got a LOT of duplicate key errors. However, it is a dev environment and they didn't hurt anything.
– Chris Mendla
Apr 4 '19 at 3:47
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Remove rows with duplicate indices (Pandas DataFrame and TimeSeries)
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I tried this but could not get it to work.. I get an error like this: TypeError: 'Series' objects are mutable, thus they cannot be hashed.. Did this actually work for you?
– Onno Eberhard
Sep 3 '19 at 13:45
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Implementing two interfaces in a class with same method. Which interface method is overridden?
...e two methods have conflicting return types, then it will be a compilation error. This is the general rule of inheritance, method overriding, hiding, and declarations, and applies also to possible conflicts not only between 2 inherited interface methods, but also an interface and a super class metho...
Java: Path vs File
...row exceptions when they failed, so it was
impossible to obtain a useful error message. For example, if a file
deletion failed, the program would receive a "delete fail" but
wouldn't know if it was because the file didn't exist, the user didn't
have permissions, or there was some other probl...
How to elegantly ignore some return values of a MATLAB function?
...e , isn't optional. Just typing [~ ~ var] will not work, and will throw an error.
See the release notes for details.
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Downcasting in Java
Upcasting is allowed in Java, however downcasting gives a compile error.
11 Answers
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When is a CDATA section necessary within a script tag?
...ret the &,<,> characters in the script tag and cause XML parsing error. So, you can write your JavaScript with entities, e.g.:
if (a &gt; b) alert('hello world');
But this is impractical. The bigger problem is that if you read the page in HTML, the tag script is considered CDATA 'by...
Can a class member function template be virtual?
... like this:
X x;
x.func2<string>("X x");
g++ report the following error:
vtempl.cpp:34: error: invalid use of `virtual' in template declaration of `virtu
al void X::func2(const T&)'
So it is obvious that:
virtual member function can be used in a class template. It is easy for compi...
Why Java needs Serializable interface?
... and if I weren't smart enough to try to serialize socket, I would find my error during debugging. However, now I'm in a situation when I can't use Java serialization at all because of 3rd party class which doesn't implement Serializable for no good reason.
– Yoni Roit
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