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How to configure MongoDB Java driver MongoOptions for production use?

I've been searching the web looking for best practices for configuring MongoOptions for the MongoDB Java driver and I haven't come up with much other than the API. This search started after I ran into the "com.mongodb.DBPortPool$SemaphoresOut: Out of semaphores to get db connection" error and by in...
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Creating a simple XML file using python

What are my options if I want to create a simple XML file in python? (library wise) 6 Answers ...
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How to represent multiple conditions in a shell if statement?

I want to represent multiple conditions like this: 8 Answers 8 ...
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C++11 tuple 这一篇就够了 - C/C++ - 清泛网 - 专注C/C++及内核技术

C++11 tuple 这一篇就够了tuple元组定义了一个有固定数目元素的容器,其中的每个元素类型都可以不相同,这与其他容器有着本质的区别 是对pair的泛化。首先来介绍元组的 tuple元组定义了一个有固定数目元素的容器,其中的每个元素...
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C++/COM VARIANT实现二维数组 - C/C++ - 清泛网 - 专注C/C++及内核技术

C++/COM VARIANT实现二维数组VARIANT变量是COM组件之间互相通信的重要的参数变量之一,它可以容纳多种不同的类型,如short、long、double等,包括各类指针和数组。组件...VARIANT变量是COM组件之间互相通信的重要的参数变量之一,它可...
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std::string的截取字符串的方法 - C/C++ - 清泛网 - 专注C/C++及内核技术

....0.1:8888"); int index = ip.find_last_of(':'); //ip ip.substr(0, index).c_str(); //port ip.substr(index + 1).c_str(); int find_first_of(char c, int start = 0): 查找字符串中第1个出现的c,由位置start开始。 如果有匹配,则返回匹配位置;否则,返回-1.默认情...
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C语言程序判断一个浮点型的数是否为零 - C/C++ - 清泛网 - 专注C/C++及内核技术

C语言程序判断一个浮点型的数是否为零f > -1e-7 && f < 1e-7详细原理请参见:《浮点数在内存中的表示》。f > -1e-7 && f < 1e-7 详细原理请参见:《浮点数在内存中的表示》。浮点型 为零
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c语言字符串常量内容是否可以通过指针修改 - C/C++ - 清泛网 - 专注C/C++及内核技术

c语言字符串常量内容是否可以通过指针修改答案是:不行。尝试修改的话,运行时程序会崩溃。int main(){ char str1[40]="hello world!"; char *str1="hello world!"...答案是:不行。尝试修改的话,运行时程序会崩溃。 int main() { char str...
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/usr/include/c++/4.9/bits/stl_iterator_base_types.h:165:53: error: ‘i...

/usr/include/c++/4.9/bits/stl_iterator_base_types.h:165:53: error: ‘int’ is not a class, struct, or union type先看下面的代码(来自:SO):#include <iostream>#include <cmath>#include <vector>using namespace std;double distance(int a, in...先看下面的代码(来自: SO): #include <i...
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MFC 获取当前时间的几种方法总结 - C/C++ - 清泛网 - 专注C/C++及内核技术

MFC 获取当前时间的几种方法总结1.CTime类获取当前时间CTime curTime = CTime::GetCurrentTime();CString strCurTime;strCurTime.Format(_T("d d d d:d:d"), curTime...1.CTime类获取当前时间 CTime curTime = CTime::GetCurrentTime(); CString strCurTime; strCurTime.Format(_T("d/d/...