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Copy file or directories recursively in Python
Python seems to have functions for copying files (e.g. shutil.copy ) and functions for copying directories (e.g. shutil.copytree ) but I haven't found any function that handles both. Sure, it's trivial to check whether you want to copy a file or a directory, but it seems like a strange omission.
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Why does sys.exit() not exit when called inside a thread in Python?
...ly simlified, I do it like this:
import sys, time
import threading
import Queue # thread-safe
class CleanExit:
pass
ipq = Queue.Queue()
def testexit(ipq):
time.sleep(5)
ipq.put(CleanExit)
return
threading.Thread(target=testexit, args=(ipq,)).start()
while True:
print "Working..."
ti...
Check whether or not the current thread is the main thread
... block();
}
else
{
dispatch_async(dispatch_get_main_queue(), block);
}
}
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Execute the setInterval function without delay the first time
...etInterval(function hello() {
console.log('world');
return hello;
}(), 5000);
There's obviously any number of ways of doing this, but that's the most concise way I can think of.
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improv...
Cron job every three days
Is it possible to run a cronjob every three days? Or maybe 10 times/month.
11 Answers
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OceanBase使用libeasy原理源码分析：客户端 - 数据库(内核) - 清泛网 - 专...
...表元素就是easy_hash_list_t类型
easy_hash_list_t send_queue_hash;
// 用于串入发送队列链表的节点
easy_list_t send_queue_list;
// 当session的包返回时处理响应的回调函数，对于OceanBase 0.4的mergeserver来说，实际上...
Wait until file is unlocked in .NET
...stFile));
You can also define the retry count, and the wait time between retries.
NOTE: Unfortunately, the underlying Win32 error (ERROR_SHARING_VIOLATION) is not exposed with .NET, so I have added a small hack function (IsSharingViolation) based on reflection mechanisms to check this.
/// &...
In Swift how to call method with parameters on GCD main thread?
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Modern versions of Swift use DispatchQueue.main.async to dispatch to the main thread:
DispatchQueue.main.async {
// your code here
}
To dispatch after on the main queue, use:
DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
// your code here
}
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What's the difference between RANK() and DENSE_RANK() functions in oracle?
...union all
select 11, 'nnn', 20000.00 from dual union all
select 11, 'mmm', 5000.00 from dual union all
select 12, 'kkk', 30000 from dual union all
select 10, 'fff', 40000 from dual union all
select 10, 'ddd', 40000 from dual union all
select 10, 'bbb', 50000 from dual union all
select 10, 'xxx', nul...
What does %~dp0 mean, and how does it work?
I find %~dp0 very useful, and I use it a lot to make my batch files more portable.
7 Answers
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