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Why doesn't 'ref' and 'out' support polymorphism?
...something from n.
That permits this sequence of events:
Declare a field x of type Animal.
Pass x as an out parameter to N.
N writes a Tiger into n, which is an alias for x.
On another thread, someone writes a Turtle into x.
N attempts to read the contents of n, and discovers a Turtle in what i...
Setting the default Java character encoding
How do I properly set the default character encoding used by the JVM (1.5.x) programmatically?
17 Answers
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NodeJS / Express: what is “app.use”?
In the docs for the NodeJS express module , the example code has app.use(...) .
23 Answers
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Accessing inactive union member and undefined behavior?
...
The confusion is that C explicitly permits type-punning through a union, whereas C++ (c++11) has no such permission.
c11
6.5.2.3 Structure and union members
95) If the member used to read the contents of a union object is not the same a...
What is the best way to convert seconds into (Hour:Minutes:Seconds:Milliseconds) time?
...utput
string str = time .ToString(@"hh\:mm\:ss\:fff");
(From Nick Molyneux) Ensure that seconds is less than TimeSpan.MaxValue.TotalSeconds to avoid an exception.
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Python: try statement in a single line
Is there a way in python to turn a try/except into a single line?
12 Answers
12
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How to include *.so library in Android Studio?
...Studio, but none of them works, especially when it comes to the point of text: This does not work with the newer xxx (Android Studio, gradle, ...)
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Why doesn't the example compile, aka how does (co-, contra-, and in-) variance work?
Following on from this question , can someone explain the following in Scala:
4 Answers
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Why am I getting an OPTIONS request instead of a GET request?
...s used to send
request data with a Content-Type other than
application/x-www-form-urlencoded, multipart/form-data, or text/plain,
e.g. if the POST request sends an XML payload to the server using
application/xml or text/xml, then the request is preflighted.
It sets custom headers in the r...
Create an empty data.frame
...aracter(),
stringsAsFactors=FALSE)
Here's an other example with different column types :
df <- data.frame(Doubles=double(),
Ints=integer(),
Factors=factor(),
Logicals=logical(),
Characters=character(),
...