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Java8: Why is it forbidden to define a default method for a method from java.lang.Object
...concludes that to get reference equality, all he need do is inherit equals from Object. Then, next week, the library maintainer for Bar "helpfully" adds a default equals implementation. Ooops! Now the semantics of Foo have been broken by an interface in another maintenance domain "helpfully" addi...
How to create a custom string representation for a class object?
...
Ignacio Vazquez-Abrams' approved answer is quite right. It is, however, from the Python 2 generation. An update for the now-current Python 3 would be:
class MC(type):
def __repr__(self):
return 'Wahaha!'
class C(object, metaclass=MC):
pass
print(C)
If you want code that runs acr...
Cannot import XSSF in Apache POI
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For OOXML to work you need the POI-OOXML jar which is separately packaged from the POI jar.
Download the POI-OOXML jar from the following location -
http://repo1.maven.org/maven2/org/apache/poi/poi-ooxml/3.11/poi-ooxml-3.11.jar
For Maven2 add the below dependency -
<dependency>
<gr...
How to change webservice url endpoint?
...nt using JBoss utils (JAX-WS compatible)
using Eclipse 'web service client from a wsdl'.
4 Answers
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send mail from linux terminal in one line [closed]
...send emails via command line. How can I send an simple email with one line from the terminal though?
7 Answers
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What exception classes are in the standard C++ library
...ull pointer
std::bad_weak_ptr <memory> constructing a shared_ptr from a bad weak_ptr
std::logic_error <stdexcept> errors detectable before the program executes
std::domain_error <stdexcept> parameter outside the valid range
std::future_error <future> v...
How is a CRC32 checksum calculated?
...-student or engineer I challenge to break this down. Everyone will benefit from this analysis.
So to work out a full example:
Original message : 1101011011
Polynomial of (W)idth 4 : 10011
Message after appending W zeros : 11010110110000
Now we divide the augm...
Isn't it silly that a tiny favicon requires yet another HTTP request? How can I put the favicon into
...tion to choose how large we want favicons to be on webbrowser tabs. Choose from: 16x16 32x32 64x64 128x128 Being the original poster, its invigorating to see 9 years later folks still care, about the little things that make life more beautiful, more enjoyable, snappier or just more elegant! :)
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In Flux architecture, how do you manage Store lifecycle?
... and decoupled as possible -- a self-contained universe that one can query from a Controller-View. The only road into the Store is through the callback it registers with the Dispatcher. The only road out is through getter functions. Stores also publish an event when their state has changed, so Co...
How to resolve “must be an instance of string, string given” prior to PHP 7?
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From PHP's manual :
Type Hints can only be of the object and array (since PHP 5.1) type. Traditional type hinting with int and string isn't supported.
So you have it. The error message is not really helpful, I give you ...