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Interfaces with static fields in java for sharing 'constants'
... An example is the SwingConstants interface in Swing, which is implemented by dozens of classes that all "re-export" all of its constants (even the ones that they don't use) as their own.
But don't just take my word for it, Josh Bloch also says it's bad:
The constant interface pattern is a poor...
How to use base class's constructors and assignment operator in C++?
... 'D' contains no new member variables then the default versions (generated by the compiler should work just fine). The default Copy constructor will call the parent copy constructor and the default assignment operator will call the parent assignment operator.
But if your class 'D' contains resource...
How do I get the SharedPreferences from a PreferenceActivity in Android?
...te
According to Shared Preferences | Android Developer Tutorial (Part 13) by Sai Geetha M N,
Many applications may provide a way to capture user preferences on the
settings of a specific application or an activity. For supporting
this, Android provides a simple set of APIs.
Preference...
String.replaceAll single backslashes with double backslashes
...ecessarily need regex for this, simply because you want an exact character-by-character replacement and you don't need patterns here. So String#replace() should suffice:
string.replace("\\", "\\\\");
Update: as per the comments, you appear to want to use the string in JavaScript context. You'd ...
Rotating a point about another point (2D)
... operation (i.e. calculating the inverse angle and then rotating clockwise by that amount)? I've seen a ton of pages giving this same formula, but nobody ever seems to see fit to talk about directionality in relation to the input / output values...
– NetXpert
A...
What does the constant 0.0039215689 represent?
...bly safe to guess that this was done for performance reasons.
Multiplying by the reciprocal is faster than repeatedly dividing by 255.
Side Note:
If you're wondering why such a micro-optimization isn't left to the compiler, it's because it is an unsafe floating-point optimization. In other word...
Edit and Continue: “Changes are not allowed when…”
...ling" he Gallio plugin. Only the uninstall solved the problem.
PS. Edited by nightcoder:
In my case disabling TypeMock Isolator (mocking framework) finally helped! Edit & Continue now works!!!
Here is the answer from TypeMock support:
After looking further into the edit
and continue issu...
Why doesn't django's model.save() call full_clean()?
...his approach 1) in case of ModelForm's full_clean() would be called twice: by the form and by the signal 2) If the form excludes some fields, they would still be validated by the signal.
– mehmet
Apr 26 '17 at 22:38
...
Getting MAC Address
...2X" % mac)[i:i+2] for i in range(0, 12, 2)) for an uppercase MAC with each byte separated by a colon.
– tomlogic
Nov 10 '14 at 17:21
5
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Java packages com and org
...namespaced according to the inverse of your domain name, and then followed by whatever you see fit. Most companies or organisations have a .com, or .org domain name, and hence most packages start with com. or org.. To quote from the Sun Code Conventions:
The prefix of a unique package name is alway...