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Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)
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Specifying the version might be helpful as the solution may be different based upon the version.
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Performance of foreach, array_map with lambda and array_map with static function
... 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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A python class that acts like dict
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class Mapping(dict):
def __setitem__(self, key, item):
self.__dict__[key] = item
def __getitem__(self, key):
return self.__dict__[key]
def __repr__(self):
return repr(self.__dict__)
def __len__(self):
re...
NSInvocation for Dummies?
... 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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In log4j, does checking isDebugEnabled before logging improve performance?
...he call, and the framework can't do that for you. The thing with formatter-based log methods is that you can pass some Object(s) (which is essentially free), and the logger will call toString() only if required.
– SusanW
Feb 2 '17 at 14:00
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Storing money in a decimal column - what precision and scale?
... waste your time with PHP 32bit when dealing with big integers, upgrade to 64bit or Node.JS ;)
– Ricky Boyce
Sep 9 '15 at 0:30
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What's the difference between parenthesis $() and curly bracket ${} syntax in Makefile?
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Based on Edouard's answer, which notes that the GNU make documentation states there's no difference, I'd guess this could just be a bug.
– Keith M
Jan 27 '17 at 17:43
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xtree(1796): warning C4800: “int”: 将值强制为布尔值“true”或“false...
...e\xtree(1775): 参见对正在编译的函数 模板 实例化“std::pair<_Ty1,_Ty2> std::_Tree<_Traits>::_Insert_nohint<std::pair<const _Kty,_Ty>&,_Nodety>(bool,_Valty,_Nodety)”的引用
1> with
1> [
1> _Ty1=std::_Tree_iterator<std::_Tree_val<std::_Tree_simple_t...
How to print instances of a class using print()?
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>>> class Test:
... def __repr__(self):
... return "Test()"
... def __str__(self):
... return "member of Test"
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>>> t = Test()
>>> t
Test()
>>> print(t)
member of Test
The __str__ method is what h...
Python __str__ and lists
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Calling string on a python list calls the __repr__ method on each element inside. For some items, __str__ and __repr__ are the same. If you want that behavior, do:
def __str__(self):
...
def __repr__(self):
return self.__str__()
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