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Java JUnit: The method X is ambiguous for type Y
... ...
What this error means is that you're passing a double and and Double into a method that has two different signatures: assertEquals(Object, Object) and assertEquals(double, double) both of which could be called, thanks to autoboxing.
To avoid the ambiguity, make sure that you either call asser...
C++ : why bool is 8 bits long?
...Because every C++ data type must be addressable.
How would you create a pointer to a single bit? You can't. But you can create a pointer to a byte. So a boolean in C++ is typically byte-sized. (It may be larger as well. That's up to the implementation. The main thing is that it must be addressable,...
Resolving javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path
...ot access. Click on the HTTPS certificate chain (there is lock icon in the Internet Explorer), click on the lock to view the certificate.
• Go to “Details” of the certificate and “Copy to file”. Copy it in Base64 (.cer) format. It will be saved on your Desktop.
• Install the certificate ...
Intel HAXM installation error - This computer does not support Intel Virtualization Technology (VT-x
...Microsoft's side. You are right to say something smells fishy but if it is intentional, Microsoft is just slow at updating the HyperV virtualization layer that is supposed to detect the processor capabilities and expose the Intel-VT features to whatever OS is residing above Hyper-V.
...
What is the direction of stack growth in most modern systems?
...so include a circular buffer of register-windows that are valid and cached internally, with traps when that over/underflows. See here for details. As the SPARCv8 manual explains, SAVE and RESTORE instructions are like ADD instructions plus register-window rotation. Using a positive constant inste...
std::back_inserter for a std::set?
...omparator of the set. Use std::inserter and pass it .begin():
std::set<int> s1, s2;
s1 = getAnExcitingSet();
transform(s1.begin(), s1.end(),
std::inserter(s2, s2.begin()), ExcitingUnaryFunctor());
The insert iterator will then call s2.insert(s2.begin(), x) where x is the value pa...
Https Connection Android
...tSocketFactory ();
}
catch (Exception e)
{
e.printStackTrace();
}
}
public Socket createSocket() throws IOException
{
return FACTORY.createSocket();
}
// TODO: add other methods like createSocket() and getDefaultCipherSuites().
// Hint: they all just m...
How to use php serialize() and unserialize()
...f a script, you need to serialize it. That just means to put the structure into a "lower common denominator" that can be handled by things other than PHP, like databases, text files, sockets. The standard PHP function serialize is just a format to express such a thing, it serializes a data structure...
dplyr: “Error in n(): function should not be called directly”
...oup"
df %>%
group_by_(g) %>%
summarise_(
n = n(),
sum = interp(~sum(col, na.rm = TRUE), col = as.name(g))
)
# Error in n() : This function should not be called directly
It can be solved as follows.
df %>%
group_by_(g) %>%
summarise_(
n = "n()",
sum = interp(...
log4net argument to LogManager.GetLogger
...
There's no point for using reflection to get the type name, and the copy/past is laziness and you get a performance hit, so why not get just the name?!
– MeTitus
Apr 8 '17 at 23:43
...