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C++STL容器使用经验总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...不能肯定最好的做法，第45条介绍了如何执行一次恰当的搜索来找到特定的元素。
2. 为将要被修改的元素做一份拷贝，。在map和multimap的情况下，请记住，不要把该拷贝的第一个部分声明为const。毕竟，你想要改变它。
3. 修改...
Why does the C preprocessor interpret the word “linux” as the constant “1”?
...unix and vax was a way to allow code to detect at compile time what system it was being compiled for. There was no official language standard back then (beyond the reference material at the back of the first edition of K&R), and C code of any complexity was typically a complex maze of #ifdefs to...
Build an ASCII chart of the most commonly used words in a given text [closed]
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edited Nov 9 '13 at 22:12
community wiki
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Should I implement __ne__ in terms of __eq__ in Python?
I have a class where I want to override the __eq__ method. It seems to make sense that I should override the __ne__ method as well, but does it make sense to implement __ne__ in terms of __eq__ as such?
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How to properly assert that an exception gets raised in pytest?
...Exception) is what you need.
Code
import pytest
def test_passes():
with pytest.raises(Exception) as e_info:
x = 1 / 0
def test_passes_without_info():
with pytest.raises(Exception):
x = 1 / 0
def test_fails():
with pytest.raises(Exception) as e_info:
x = 1 / 1...
A simple explanation of Naive Bayes Classification
I am finding it hard to understand the process of Naive Bayes, and I was wondering if someone could explain it with a simple step by step process in English. I understand it takes comparisons by times occurred as a probability, but I have no idea how the training data is related to the actual datase...
C++ preprocessor __VA_ARGS__ number of arguments
...variadic argument macros, how to find the number of arguments? I am okay with boost preprocessor, if it has the solution.
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What does if __name__ == “__main__”: do?
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Whenever the Python interpreter reads a source file, it does two things:
it sets a few special variables like __name__, and then
it executes all of the code found in the file.
Let's see how this works and how it relates to your question about the __name__ checks we always s...
Usage of __slots__?
What is the purpose of __slots__ in Python — especially with respect to when I would want to use it, and when not?
11 A...
Can someone explain __all__ in Python?
...e and more, and I keep seeing the variable __all__ set in different __init__.py files. Can someone explain what this does?
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