大约有 11,290 项符合查询结果（耗时：0.0116秒） [XML]
Never seen before C++ for loop
...
The condition of the for loop is in the middle - between the two semicolons ;.
In C++ it is OK to put almost any expression as a condition: anything that evaluates to zero means false; non-zero means true.
In your case, the condition is u--: when you convert to C#, simply...
How is __eq__ handled in Python and in what order?
...
The a == b expression invokes A.__eq__, since it exists. Its code includes self.value == other. Since int's don't know how to compare themselves to B's, Python tries invoking B.__eq__ to see if it knows how to compare itself to an i...
正则表达式 30 分钟入门教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...出来。如果要精确地查找hi这个单词的话，我们应该使用\bhi\b。
\b是正则表达式规定的一个特殊代码（好吧，某些人叫它元字符，metacharacter），代表着单词的开头或结尾，也就是单词的分界处。虽然通常英文的单词是由空格，...
How to mock an import
Module A includes import B at its top. However under test conditions I'd like to mock B in A (mock A.B ) and completely refrain from importing B .
...
Why doesn't Dijkstra's algorithm work for negative weight edges?
Can somebody tell me why Dijkstra's algorithm for single source shortest path assumes that the edges must be non-negative.
...
How to avoid circular imports in Python? [duplicate]
I know the issue of circular imports in python has come up many times before and I have read these discussions. The comment that is made repeatedly in these discussions is that a circular import is a sign of a bad design and the code should be reorganised to avoid the circular import.
...
What does asterisk * mean in Python? [duplicate]
...ng in Python as it does in C? I saw a function like this in the Python Cookbook:
5 Answers
...
How to convert string representation of list to a list?
...
>>> import ast
>>> x = u'[ "A","B","C" , " D"]'
>>> x = ast.literal_eval(x)
>>> x
['A', 'B', 'C', ' D']
>>> x = [n.strip() for n in x]
>>> x
['A', 'B', 'C', 'D']
ast.literal_eval:
With ast.literal_eval, you can safe...
How can I check if multiplying two numbers in Java will cause an overflow?
I want to handle the special case where multiplying two numbers together causes an overflow. The code looks something like this:
...
How to get all possible combinations of a list’s elements?
I have a list with 15 numbers in, and I need to write some code that produces all 32,768 combinations of those numbers.
27...