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List attributes of an object
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>>> class new_class():
... def __init__(self, number):
... self.multi = int(number) * 2
... self.str = str(number)
...
>>> a = new_class(2)
>>> a.__dict__
{'multi': 4, 'str': '2'}
>>> a.__dict__.keys(...
dismissModalViewControllerAnimated deprecated
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The warning is still there. In order to get rid of it I put it into a selector like this:
if ([self respondsToSelector:@selector(dismissModalViewControllerAnimated:)]) {
[self performSelector:@selector(dismissModalViewControllerAnimated:) withObject:[...
How do I convert NSInteger to NSString datatype?
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NSIntegers are not objects, you cast them to long, in order to match the current 64-bit architectures' definition:
NSString *inStr = [NSString stringWithFormat: @"%ld", (long)month];
share
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How can I specify a [DllImport] path at runtime?
...h for the DLL.
If SafeDllSearchMode is enabled (the default), the search order is as follows:
The directory from which the application loaded.
The system directory. Use the GetSystemDirectory function to get the path of this directory.
The 16-bit system directory. There is no function that obtain...
Difference between __str__ and __repr__?
What is the difference between __str__ and __repr__ in Python?
23 Answers
23
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Confused about __str__ on list in Python [duplicate]
Coming from a Java background, I understand that __str__ is something like a Python version of toString (while I do realize that Python is the older language).
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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...
How to find all the subclasses of a class given its name?
...ses (i.e. subclassed from object, which is the default in Python 3) have a __subclasses__ method which returns the subclasses:
class Foo(object): pass
class Bar(Foo): pass
class Baz(Foo): pass
class Bing(Bar): pass
Here are the names of the subclasses:
print([cls.__name__ for cls in Foo.__subcla...
Generate random numbers uniformly over an entire range
...);
std::shuffle(vec.begin(), vec.end(), generator);
The algorithm will reorder the elements randomly, with a linear complexity.
Boost.Random
Another alternative, in case you don't have access to a C++11+ compiler, is to use Boost.Random. Its interface is very similar to the C++11 one.
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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...