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When should I use uuid.uuid1() vs. uuid.uuid4() in python?
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My team just ran into trouble using UUID1 for a database upgrade script where we generated ~120k UUIDs within a couple of minutes. The UUID collision led to violation of a primary key constraint.
We've upgraded 100s of servers but on our Amazon EC2 instances we ran into this issue a few t...
Seeing escape characters when pressing the arrow keys in python shell
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On OSX with brew, all I had to do was brew reinstall python3
– Ranhiru Jude Cooray
Sep 16 '17 at 4:01
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See what process is using a file in Mac OS X
...ble to track a file and see which process is touching that file. Is that possible? I know that I can see the list of open processes in activity monitor but I think it's happening to quickly for me to see it. The reason for this is I'm using a framework and I think the system version of the framew...
What is DOM Event delegation?
...is event delegation. Here's an example of it in practice:
<ul onclick="alert(event.type + '!')">
<li>One</li>
<li>Two</li>
<li>Three</li>
</ul>
With that example if you were to click on any of the child <li> nodes, you would see an...
How should I use git diff for long lines?
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Mostly "<-[m" for each newline (where <- was a single arrow character), but also markers where (I think) each colour would have started, like "<-[1m" and "<-[32m".
– Peter Boughton
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Lost httpd.conf file located apache [closed]
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In some OS's you will get the relative path of conf file : -D SERVER_CONFIG_FILE="apache2.conf" You can run "/usr/sbin/apache2 -V | grep HTTPD_ROOT" to find the root. Output: "-D HTTPD_ROOT="/etc/apache2/apache2.conf" The absolute pa...
Get filename from file pointer [duplicate]
If I have a file pointer is it possible to get the filename?
1 Answer
1
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MAC下如何删除NTFS格式U盘的东西？ - 更多技术 - 清泛网 - 专注C/C++及内核技术
...除NTFS格式U盘的东西？mac上只提供了它自身磁盘格式（mac os 扩展日子）等的读写权限，只提供了读的权限给NTFS、FAT32给硬盘和U盘，我们99%使用的硬盘和U盘都是...mac上只提供了它自身磁盘格式（mac os 扩展日子）等的读写权限，只...
Objective-C class -> string like: [NSArray className] -> @“NSArray”
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@AlexZavatone: className is a method added by the scripting extensions which is only available on Mac OS X, even then it is finicky in how it works because it is not fully documented (or at least it wasn't the last time I checked). NSStringFromClass() is the correct way to g...
Access denied for user 'root'@'localhost' while attempting to grant privileges. How do I grant privi
...have them.
When installing a brand new mysql server instance, the install script will create all the mysql.* tables with the proper structure.
When upgrading from an old version, make sure the proper upgrade procedure (mysql_upgrade) is used, which will add the missing tables / columns.
It is onl...