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How to create abstract properties in python abstract classes
In the following code, I create a base abstract class Base . I want all the classes that inherit from Base to provide the name property, so I made this property an @abstractmethod .
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Why does GCC generate 15-20% faster code if I optimize for size instead of speed?
... gcc-4.8.1 0.296s 0.288s
Update: on Ivy Bridge-based Core i3 three versions of gcc (4.6.4, 4.7.3, and 4.8.1) produce binaries with significantly different performance, but the assembly code has only subtle variations. So far, I have no explanation of this fact.
Assembly ...
Android: AutoCompleteTextView show suggestions when no text entered
...oesn't show dropdown on orientation changes.
– Miha_x64
Jun 24 at 14:34
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Why does fatal error “LNK1104: cannot open file 'C:\Program.obj'” occur when I compile a C++ project
...t the library correctly. Sometimes the lib folder consists of a x86 and a x64 folder. You have to set it to one of those (depending on your compiler) rather than the folder containing both.
– M4st3rM1nd
Apr 28 '13 at 22:56
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Why does Date.parse give incorrect results?
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return new Date(parts[0], parts[1]-1, parts[2]); // Note: months are 0-based
}
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C++ templates that accept only certain types
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I suggest using Boost's static assert feature in concert with is_base_of from the Boost Type Traits library:
template<typename T>
class ObservableList {
BOOST_STATIC_ASSERT((is_base_of<List, T>::value)); //Yes, the double parentheses are needed, otherwise the comma will be...
Counting inversions in an array
... +1, See similar solution in C++11, including a general iterator-based solution and sample random testbed using sequences from 5-25 elements. Enjoy!.
– WhozCraig
Apr 20 '14 at 20:15
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How can I use “:” as an AWK field separator?
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64
If you want to do it programatically, you can use the FS variable:
echo "1: " | awk 'BEGIN { F...
“x not in y” or “not x in y”
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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“Too many values to unpack” Exception
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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