vector

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Modifying array for pygame to blit

I have a medium sized array of tiles represented as numbers that pygame blits to the surface each tick. My array looks like this:[详细]

2023-04-03 23:01 分类：问答
Read N bytes from file and append them to a std::vector

I want to rea开发者_运维知识库d N bytes of data from a file stream and append them to a vector. So let\'s say we have a[详细]

2023-04-03 22:13 分类：问答
How can I get a pointer to the first element in an std::vector?

I want to write data from an std::v开发者_如何学编程ector<char> to a socket, using the write function, which has this prototype:[详细]

2023-04-03 21:13 分类：问答
How to create solid extrusion of bitmap with OpenGL?

I have a bitmap imag开发者_开发知识库e (RGB, no alpha), like the image below (letter \'R\'): Which is the best way, with OpenGL & VC++, to create the extrusion of the bitmap? Parameter is a 3f[详细]

2023-04-03 18:15 分类：问答
How to access elements within multi-dimensional vector?

I need to create a variable-sized two-dimensional coordinate system. What I\'ve been able to come up with so far is:[详细]

2023-04-03 14:16 分类：问答
Function that polymorphically handles vector and hash_set

I have function in C++ that takes a vector and pushes some items onto it. For example: void MyFunction(vector<int>* output);[详细]

2023-04-03 13:46 分类：问答
what's faster: recreate or clear()?

I have a question about the performance of 开发者_开发知识库the std::vector<> in C++. Is it faster to reuse the same vector by calling its clear() method or it it faster to recreate the vector?[详细]

2023-04-03 09:12 分类：问答
Accessing a vector inside a vector [duplicate]

This question already has answers here: 开发者_如何学Go Closed 11 years ago. Possible Duplicate: Is there a way to access an index within a vector[详细]

2023-04-03 04:36 分类：问答
Move bottom quarter of a vector to the top efficiently?

Given a vector with 100 elements, I want to move elements 75 to 100 to the front so that 75 is array[0], 76 is array[1] and 1 is arra开发者_开发问答y[25].[详细]

2023-04-02 22:13 分类：问答
recoding using R

I have a data set with dam, sire, plus other variables but I need to recode my dam and sire id\'s. The dam column is sorted and each animal is only apprearing once. On the other hand, the sire column[详细]

2023-04-02 20:51 分类：问答