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搭建高可用mongodb集群（四）—— 分片 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...前几篇文章。
任意登陆一个机器，比如登陆192.168.0.136，连接mongodb
#设置第一个分片副本集
/data/mongodbtest/mongodb-linux-x86_64-2.4.8/bin/mongo 127.0.0.1:22001
#使用admin数据库
use admin
#定义副本集配置
config = { _id:"shard1", members:[
...
Excel RTD(Excel Real-Time Data)实时刷新数据技术 - C/C++ - 清泛网 - 专注C/C++及内核技术
...一个方法是UpdateNotify方法。该方法想Excel发出一个通知，提示有新数据需要更新，这是Excel就会调用RefreshData方法，从中读取到更新后的数据。需要注意的是调用UpdateNofity方法必须要在Excel主线程中进行。
三 实例：RTD实时行情
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Applicatives compose, monads don't
...statement: list <*> pure True <*> pure "hello" <*> pure (error "bad")....I get "hello" and the error never occurs. This code isn't nearly as safe or controlled as a monad, but the post seems like it's suggesting that applicatives cause strict evaluation. Overall great post though! ...
Can the Unix list command 'ls' output numerical chmod permissions?
...get the file permission information. Calculating it by hand will lead to errors!
– Evan Langlois
Nov 9 '15 at 6:28
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show 3 more comments
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Find files containing a given text
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I got error grep: (error|fail): No such file or directory on Ubuntu Desktop 16; any hints?
– Nam G VU
Jul 24 '17 at 10:32
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How to split a large text file into smaller files with equal number of lines?
...s per output file
--verbose print a diagnostic to standard error just
before each output file is opened
--help display this help and exit
--version output version information and exit
You could do something like this:
split -l 200000 fi...
How to set auto increment primary key in PostgreSQL?
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Getting this error in pgAdmin 4. Both bigserial and serial are giving the same error: ERROR: syntax error at or near "BIGSERIAL"
– adi
Oct 30 '16 at 10:59
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libevent+protobuf轻松搭建tcpserver - C/C++ - 清泛网 - 专注C/C++及内核技术
...p_server(int port);
// client端socket流程:socket(),connect()，返回连接的sockfd
int create_io_channel(const char *ipaddr, int port);
2. 搭建TCP Server
下面以伪代码方式给出，错误处理省略
int main(int argc, char *argv[])
{
// 初始化
…
// event...
How to get line count of a large file cheaply in Python?
..., and even better is doing this within a try-except block, where the and IOError exception is thrown if the file cannot be opened.
– BoltzmannBrain
May 20 '15 at 22:58
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Failed to install Python Cryptography package with PIP and setup.py
...ckage from their site and running python setup.py , I get the following error:
25 Answers
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