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Android Studio marks R in red with error message “cannot resolve symbol R”, but build succeeds
...fragment layout line: android:layout_bottom="@id/my_list" Simply switching from this line from one fragment to use layout_top on another fragment.
– Mingsheng
Jul 8 '15 at 14:47
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What is a “surrogate pair” in Java?
...ode units are used. Since 16 bits can only contain the range of characters from 0x0 to 0xFFFF, some additional complexity is used to store values above this range (0x10000 to 0x10FFFF). This is done using pairs of code units known as surrogates.
The surrogate code units are in two ranges known as "...
How to rethrow InnerException without losing stack trace in C#?
...d due to the await C# language feature, which unwraps the inner exceptions from AggregateException instances in order to make the asynchronous language features more like the synchronous language features.
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How to fix “ImportError: No module named …” error in Python?
...s; this is done to prevent directories with a common name, such as string, from unintentionally hiding valid modules that occur later on the module search path. In the simplest case, init.py can just be an empty file
– panofish
Jan 14 '16 at 21:13
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How to create a custom string representation for a class object?
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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...
Why are arrays covariant but generics are invariant?
From Effective Java by Joshua Bloch,
9 Answers
9
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Is there common street addresses database design for all addresses of the world? [closed]
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It is possible to represent addresses from lots of different countries in a standard set of fields. The basic idea of a named access route (thoroughfare) which the named or numbered buildings are located on is fairly standard, except in China sometimes. Other nea...
STL or Qt containers?
... using std::(w)string and the STL containers exclusively and converting to/from the Qt equivalents, but I have already switched to QString and I find that I'm using Qt's containers more and more.
When it comes to strings, QString offers much more complete functionality compared to std::basic_string...
Android Studio rendering problems
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I was able to fix this in Android Studio 0.2.0 by changing API from API 18: Android 4.3 to API 17: Android 4.2.2
This is under the Android icon menu in the top right of the design window.
This was a solution from http://www.hankcs.com/program/mobiledev/idea-this-version-of-the-render...
What does “#define _GNU_SOURCE” imply?
...nux extension functions
access to traditional functions which were omitted from the POSIX standard (often for good reason, such as being replaced with better alternatives, or being tied to particular legacy implementations)
access to low-level functions that cannot be portable, but that you sometime...