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ifstream 线程安全读文件 - C/C++ - 清泛网 - 专注C/C++及内核技术
ifstream 线程安全读文件函数 safeGetline：std::istream& safeGetline(std::istream& is, std::string& t){ t clear(); 使用std::streambuf 函数 safeGetline：
std::istream& safeGetline(std::istream& is, std::string& t)
{
t.clear();
//这比使用std::istream逐个读...
C#中数组、ArrayList和List三者的区别 - 更多技术 - 清泛网 - 专注C/C++及内核技术
C#中数组、ArrayList和List三者的区别在C#中数组，ArrayList，List都能够存储一组对象，那么这三者到底有什么样的区别呢。数组 数组在C#中最早出现的。在内存中是连续存储的，...在C#中数组，ArrayList，List都能够存储一组对象，那么...
Linq 多字段排序，二次排序 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...q 多字段排序，二次排序Linq：ordered = source.OrderByDescending( t => t.f1 ).ThenBy( t => t.f2 );类似SQL：select * from t1 order by f1 d...Linq：ordered = source.OrderByDescending( t => t.f1 ).ThenBy( t => t.f2 );
类似SQL：select * from t1 order by f1 desc ,f2 asc
这种写法...
What's the best way to trim std::string?
I'm currently using the following code to right-trim all the std::strings in my programs:
46 Answers
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How to convert std::string to lower case?
I want to convert a std::string to lowercase. I am aware of the function tolower() , however in the past I have had issues with this function and it is hardly ideal anyway as use with a std::string would require iterating over each character.
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Equivalent of typedef in C#
Is there a typedef equivalent in C#, or someway to get some sort of similar behaviour? I've done some googling, but everywhere I look seems to be negative. Currently I have a situation similar to the following:
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Why do you program in assembly? [closed]
... hardcore low level hackers out there. I ran across this sentence in a blog. I don't really think the source matters (it's Haack if you really care) because it seems to be a common statement.
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Print a file's last modified date in Bash
I can't seem to find how to print out the date of a file. I'm so far able to print out all the files in a directory, but I need to print out the dates with it.
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Pandas dataframe get first row of each group
I have a pandas DataFrame like following.
5 Answers
5
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Declaring an enum within a class
In the following code snippet, the Color enum is declared within the Car class in order to limit the scope of the enum and to try not to "pollute" the global namespace.
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