stdvector

相关标签：javascript jquery android 多少钱 iPhone

Proper way to implement move semantics for class with std::vector of std::vector member

I have a class that has a member which is a vector of vectors. I would like to write a constructor for this class that takes an r-value reference to a single vector as an argument, and moves it into t[详细]

2023-04-09 05:31 分类：问答
Optimal way to fill std::vector<char> buffer

This buffer should contain slots (three in this example) of equal length ( 20 in this example) The buffer has to have contiguous memory so that it can be passed to a C function in non-const fashion.[详细]

2023-04-08 16:31 分类：问答
How to work with null pointers in a std::vector

Say I have a vector of null terminates strings some of which may be null pointers. I don\'t know even if this is legal. It is a learning exercise. Example code[详细]

2023-04-08 08:49 分类：问答
Howto avoid copying when casting a vector<Derived*> to a vector<Base*>

Is there a way to avoid c开发者_如何转开发opying large vectors, when a function expects a vector with (pointer to) baseclass objects as input but I only have a vector of (pointers to) derived objects?[详细]

2023-04-07 06:50 分类：问答
Shorter way to get an iterator for a std::vector

Lets say that I have got a vector like this. std::vector<a_complicated_whatever_identifier *> *something[详细]

2023-04-06 18:02 分类：问答
Copying a GpuMat row to a std::vector

How can I transfer cv::gpu::GpuMat rows to std::vector with as little 开发者_StackOverflowas possible copy operations?[详细]

2023-04-06 16:26 分类：问答
std::vector<unsigned short> somehow contains numbers > 300?

I have a std::vector<unsigned short> that somehow contains numbers that are greater than 300. unsigned short usually only permits 0 to 255, nowhere in开发者_如何学编程 the program attempts to a[详细]

2023-04-05 13:17 分类：问答
Before or after when adding to sets in C++

Given my_type m; std::vector<my_type> v; 开发者_开发百科 Which runs more quickly? m.generate_data_inside_self();[详细]

2023-04-05 09:12 分类：问答
Returning an empty vector of strings if key is not found

I know it is a very bad idea, so other suggestions on how to do it efficiently will be well-received.[详细]

2023-04-05 01:18 分类：问答
What is the fastest way to check if std::vector index is not out of bounds?

Often I want to make sure I am in bounds once at the top of my function body. The different ways I do this are:[详细]

2023-04-04 15:13 分类：问答