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C语言结构体里的成员数组和指针 - c++1y / stl - 清泛IT社区，为创新赋能！
...危险玩法——相对于C++来说，C++编译器帮你管了继承和虚函数表，语义也清楚了很多）指针和数组的差别有了上面的基础后，你把源代码中的struct str结构体中的char s[0];改成char *s;试试看，你会发现，在13行if条件的时候，程序因...
Boost程序库完全开发指南——深入C++“准”标准库高清PDF版 - 文档下载 - ...
...字符串处理、正则表达式、容器与数据结构、并发编程、函数式编程、泛型编程、设计模式实现等许多领域，极大地丰富了C++的功能和表现力，能够使C++软件开发更加简洁、优雅、灵活和高效。
《Boost程序库完全开发指南：深...
Is there a WebSocket client implemented for Python? [closed]
...n(ws):
def run(*args):
for i in range(30000):
time.sleep(1)
ws.send("Hello %d" % i)
time.sleep(1)
ws.close()
print "thread terminating..."
thread.start_new_thread(run, ())
if __name__ == "__main__":
websocket.enableTrace(True)
...
How to close this ssh tunnel? [closed]
...34 server &
pid=$!
echo "waiting a few seconds to establish tunnel..."
sleep 5
... do yer stuff... launch mysql workbench whatever
echo "killing ssh tunnel $pid"
kill $pid
Or better yet, just create this as a wrapper script:
# backend-tunnel <your cmd line, possibly 'bash'>
ssh -N -L123...
Numpy - add row to array
...0 rows, one at a time:
import numpy as np
from time import perf_counter, sleep
def time_it():
# Compare performance of two methods for adding rows to numpy array
py_array = [[0, 1, 2], [0, 2, 0]]
py_row = [4, 5, 6]
numpy_array = np.array(py_array)
numpy_row = np.array([4,5,6])...
Script entire database SQL-Server
...kens and some conditional logic.
Example script (edited for brevity)
-- Sleep: 5
-- Sleep after creating database to allow file system to create db files
CREATE DATABASE [$Database$]
GO
EXEC sp_dbcmptlevel [$Database$], $CompatabilityLevel$
GO
USE [$Database$]
GO
IF '1'!='$IntegratedSecurity$...
How do I daemonize an arbitrary script in unix?
...ft
# Run command until we're killed.
while true; do
$COMMAND "$@"
sleep 10 # if command dies immediately, don't go into un-ctrl-c-able loop
done
The first argument is the name of the pid file to use. The second argument is the command. And all other arguments are the command's arguments.
...
MySQL主从服务器数据一致性的核对与修复 - 数据库(内核) - 清泛网 - 专注C/...
...在主服务器上运行pt-table-checksum，它会通过一系列的MySQL函数计算每个表的散列值，利用主从复制关系，把同样的计算过程在从服务器上重放，从而就拿到了主从服务器各自的散列值，只要比较散列值是否相同就OK了。
这里面有...
How to create cron job using PHP?
...by url on your browser.
its very simple if you run curl
while(true)
{
sleep(60); // sleep for 60 sec = 1 minute
$s = curl_init();
curl_setopt($s,CURLOPT_URL, $your_php_url_to_cron);
curl_exec($s);
curl_getinfo($s,CURLINFO_HTTP_CODE);
curl_close($s);
}
...
What does a lazy val do?
... it is not sure if it is later used.
scala> class X { val x = { Thread.sleep(2000); 15 } }
defined class X
scala> class Y { lazy val y = { Thread.sleep(2000); 13 } }
defined class Y
scala> new X
res5: X = X@262505b7 // we have to wait two seconds to the result
scala> new Y
res6: Y = ...