大约有 40,000 项符合查询结果(耗时:0.0633秒) [XML]

https://stackoverflow.com/ques... 

Getting the name of a variable as a string

... OK, finally got it! Installed using the following pip3 install python-varname==0.1.5; imported using from varname import nameof – enter_display_name_here Jun 6 at 2:42 ...
https://stackoverflow.com/ques... 

Updating MySQL primary key

I have a table user_interactions with 4 columns: 3 Answers 3 ...
https://stackoverflow.com/ques... 

How can I see the raw SQL queries Django is running?

...t the output of the query is not valid SQL, because: "Django never actually interpolates the parameters: it sends the query and the parameters separately to the database adapter, which performs the appropriate operations." From Django bug report #17741. Because of that, you should not send qu...
https://stackoverflow.com/ques... 

Correct Bash and shell script variable capitalization

I run across many shell scripts with variables in all caps, and I've always thought that there is a severe misunderstanding with that. My understanding is that, by convention (and perhaps by necessity long ago), environment variables are in all-caps. ...
https://stackoverflow.com/ques... 

Insert, on duplicate update in PostgreSQL?

...it would be much slower, because each upsert would be its' own individual call into the database. – baash05 Mar 1 '12 at 0:27 ...
https://stackoverflow.com/ques... 

postgresql list and order tables by size

How can I list all the tables of a PostgreSQL database and order them by size ? 7 Answers ...
https://stackoverflow.com/ques... 

More elegant way of declaring multiple variables at the same time

...variables with Boolean values is the best way to write your routine (especially if they really have one-letter names :) Depending on what you're doing, it may make sense to use a dictionary instead. For example, if you want to set up Boolean preset values for a set of one-letter flags, you could d...
https://stackoverflow.com/ques... 

(Mac) -bash: __git_ps1: command not found

...r - in git's development history this is after a commit that split out the __git_ps1 function from the completion functionality into a new file (git-prompt.sh). The commit that introduced this change, which explains the rationale, is af31a456. I would still suggest that you just source the version...
https://stackoverflow.com/ques... 

Why does comparing strings using either '==' or 'is' sometimes produce a different result?

...l reasons: it is inherently O(n) in the length of the strings; it typically requires reads from several regions of memory, which take time; and the reads fills up the processor cache, meaning there is less cache available for other needs. With interned strings, a simple object identi...
https://stackoverflow.com/ques... 

How to install MySQLdb (Python data access library to MySQL) on Mac OS X?

... Update for those using Python3: You can simply use conda install mysqlclient to install the libraries required to use MySQLdb as it currently exists. The following SO question was a helpful clue: Python 3 ImportError: No module named 'ConfigParser' . Installing mysqlclient will install...