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What are the mathematical/computational principles behind this game?
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Finite Projective Geometries
The axioms of projective (plane) geometry are slightly differen...
how to convert array values from string to int?
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14 Answers
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How to avoid reinstalling packages when building Docker image for Python projects?
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143
Try to build a Dockerfile which looks something like this:
FROM my/base
WORKDIR /srv
ADD ./re...
How can I profile C++ code running on Linux?
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19 Answers
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How do I replace NA values with zeros in an R dataframe?
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21 Answers
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How do you match only valid roman numerals with a regular expression?
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C++实现一款简单完整的聊天室服务器+客户端 - C/C++ - 清泛网 - 专注C/C++及内核技术
...#define _MESSAGE_BUF_INCLUDE_
#include <pthread.h>
#define MESSAGE_COUNT 16
#define MESSAGE_LENGTH 2048
class MessageBuffer{
private:
pthread_mutex_t mutex;//访问缓冲的互斥量
pthread_cond_t condition;//访问缓冲区的条件变量
//消息缓冲区，循环队列
char buf[...
What do hjust and vjust do when making a plot using ggplot?
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The value of hjust and vjust are only defined between 0 and 1:
0 means left-justified
1 means right-justified
Source: ggplot2, Hadley Wickham, page 196
(Yes, I know that in most cases you can use it beyond this range, but don't expect it to behave in any specific way. This is ou...
Is there a better way of writing v = (v == 0 ? 1 : 0); [closed]
I want to toggle a variable between 0 and 1. If it's 0 I want to set it to 1, else if it's 1 I want to set it to 0.
31 Answ...
What Process is using all of my disk IO
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162
You're looking for iotop (assuming you've got kernel >2.6.20 and Python 2.5). Failing that...