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搭建高可用mongodb集群（三）—— 深入副本集内部机制 - 大数据 & AI - 清...
...选举 那mongodb是怎进行选举的呢？官方这么描述:
We use a consensus protocol to pick a primary. Exact details will be spared here but that basic process is:
get maxLocalOpOrdinal from each server.
if a majority of servers are not up (from this server’s POV), remain in...
Windows下 C++网络延时检测 - C/C++ - 清泛网 - 专注C/C++及内核技术
...define PING_TIMES 2 //ping 4 次
typedef struct _IPINFO
{
unsigned char Ttl; // Time To Live
unsigned char Tos; // Type Of Service
unsigned char IPFlags; // IP flags
unsigned char OptSize; // Size of options data
unsigned char FAR *Options; // Options data buffer
}IPINFO;
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Rails create or update magic?
I have a class called CachedObject that stores generic serialised objects indexed by key. I want this class to implement a create_or_update method. If an object is found it will update it, otherwise it will create a new one.
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Favorite Visual Studio keyboard shortcuts [closed]
What is your favorite Visual Studio keyboard shortcut? I'm always up for leaving my hands on the keyboard and away from the mouse!
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Get the distance between two geo points
I want to make an app which checks the nearest place where a user is. I can easily get the location of the user and I have already a list of places with latitude and longitude.
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Find JavaScript function definition in Chrome
Chrome's Developer Tools rock, but one thing they don't seem to have (that I could find) is a way to find a JavaScript function's definition. This would be super handy for me because I'm working on a site that includes many external JS files. Sure grep solves this but in the browser would be much be...
Detect application heap size in Android
How do you programmatically detect the application heap size available to an Android app?
9 Answers
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Update a dataframe in pandas while iterating row by row
I have a pandas data frame that looks like this (its a pretty big one)
8 Answers
8
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How to get week number in Python?
How to find out what week number is current year on June 16th (wk24) with Python?
14 Answers
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What does bundle exec rake mean?
What does bundle exec rake db:migrate mean? Or just bundle exec rake <command> in general?
7 Answers
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