大约有 8,200 项符合查询结果(耗时:0.0275秒) [XML]

https://stackoverflow.com/ques... 

How to download an entire directory and subdirectories using wget?

I am trying to download the files for a project using wget , as the SVN server for that project isn't running anymore and I am only able to access the files through a browser. The base URLs for all the files is the same like ...
https://stackoverflow.com/ques... 

Simple proof that GUID is not unique [closed]

I'd like to prove that a GUID is not unique in a simple test program. I expected the following code to run for hours, but it's not working. How can I make it work? ...
https://stackoverflow.com/ques... 

How to import existing Git repository into another?

I have a Git repository in a folder called XXX , and I have second Git repository called YYY . 15 Answers ...
https://stackoverflow.com/ques... 

How do I temporarily disable triggers in PostgreSQL?

... loading data and can re-calculate all trigger modifications much more cheaply after the fact than on a row-by-row basis. 6...
https://stackoverflow.com/ques... 

Python multiprocessing PicklingError: Can't pickle

I am sorry that I can't reproduce the error with a simpler example, and my code is too complicated to post. If I run the program in IPython shell instead of the regular Python, things work out well. ...
https://stackoverflow.com/ques... 

How should one use std::optional?

I'm reading the documentation of std::experimental::optional and I have a good idea about what it does, but I don't understand when I should use it or how I should use it. The site doesn't contain any examples as of yet which leaves it harder for me to grasp the true concept of this object. When...
https://stackoverflow.com/ques... 

How to store arrays in MySQL?

I have two tables in MySQL. Table Person has the following columns: 7 Answers 7 ...
https://stackoverflow.com/ques... 

How to stop mysqld

... Try: /usr/local/mysql/bin/mysqladmin -u root -p shutdown Or: sudo mysqld stop Or: sudo /usr/local/mysql/bin/mysqld stop Or: sudo mysql.server stop If you install the Launchctl in OSX you can try: MacPorts sudo launchctl unload -w /Library/LaunchDaemons/org....
https://stackoverflow.com/ques... 

Surrogate vs. natural/business keys [closed]

... Both. Have your cake and eat it. Remember there is nothing special about a primary key, except that it is labelled as such. It is nothing more than a NOT NULL UNIQUE constraint, and a table can have more than one. If you use a surrogate key, you still want a business key to ensure u...
https://stackoverflow.com/ques... 

How can I generate Unix timestamps?

Related question is "Datetime To Unix timestamp", but this question is more general. 18 Answers ...