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总结const_cast、static_cast、dynamic_cast、reinterpret_cast - C/C++ - ...
...t z;
};情况1：两个无关的类之间的转换
// Convert between CBaseX* and CBaseY*
// CBaseX* 和 CBaseY*之间的转换
CBaseX* pX = new CBaseX();
// Error, types pointed to are unrelated
// 错误， 类型指向是无关的
// CBaseY*...
PHP - Get bool to echo false when false
...'ve been programming for 20+ years and never have I wanted 'false' to auto-convert to blank.. null many times, but never 'false'. My Java/Spring/Hibernate development is so so so much cleaner & stronger than even modest PHP systems. I could find plenty of people who were confused.. stackoverflow...
How come an array's address is equal to its value in C?
...er than the first (because it's an array of 16 char's). Since %p typically converts pointers in hexadecimal, it might look something like:
0x12341000 0x12341010
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Can I list-initialize a vector of move-only type?
...ove_only()) };
Since the standard, for whatever reason, doesn't define a converting copy constructor like this:
// in class initializer_list
template<class U>
initializer_list(initializer_list<U> const& other);
The initializer_list<rref_wrapper<move_only>> created by...
Post-install script with Python setuptools
...worked for me in a Python 3.5 environment:
import atexit
import os
import sys
from setuptools import setup
from setuptools.command.install import install
class CustomInstall(install):
def run(self):
def _post_install():
def find_module_path():
for p in sys.p...
Python: Using .format() on a Unicode-escaped string
...'\u2265'
>>> print s
works because print automatically uses the system encoding for your environment, which was likely set to UTF-8. (You can check by doing import sys; print sys.stdout.encoding)
>>> print "{0}".format(s)
fails because format tries to match the encoding of the ...
What is the difference between bool and Boolean types in C#
...
Am sorry but that is wrong, you cannot convert bool or Bolean to null because they are nullable types
– Timothy Macharia
Feb 22 '16 at 6:03
...
Difference between a user and a schema in Oracle?
...des the EMP, DEPT and BONUS tables with various grants, and
other stuff.
SYS is a schema that includes tons of tables, views, grants, etc etc etc.
SYSTEM is a schema.....
Technically -- A schema is the set of metadata (data dictionary) used by the database,
typically generated using DDL. A sche...
QString to char* conversion
I was trying to convert a QString to char* type by the following methods, but they don't seem to work.
10 Answers
...
Reloading module giving NameError: name 'reload' is not defined
...as below. Use this in the top of the module (assumes python 3.4+).
import sys
if(sys.version_info.major>=3):
def reload(MODULE):
import importlib
importlib.reload(MODULE)
BTW reload is very much required if you use python files as config files and want to avoid rest...