大约有 47,000 项符合查询结果（耗时：0.0688秒） [XML]
Django dump data for a single model?
...nd greater, the Django dumpdata management command allows you to dump data from individual tables:
./manage.py dumpdata myapp1 myapp2.my_model
You can also separate multiple apps and models on the command line. Here's the canonical definition:
django-admin dumpdata [app_label[.ModelName] [app_la...
How Scalable is SQLite? [closed]
...ccasionally getting a database locked error when trying to execute queries from the shell in sqlite. That said, I am running another site from SQLite just fine. The difference is that the site is static (i.e. I'm the only one that can change the database) and so it works just fine for concurrent rea...
How to pass command line argument to gnuplot?
I want to use gnuplot to draw figure from data file, say foo.data . Currently, I hardcoded the data file name in the command file, say foo.plt , and run command gnuplot foo.plg to plot data. However, I want to pass the data file name as a command argument, e.g. running command gnuplot foo.plg f...
Class vs. static method in JavaScript
... class, it's a function, which is an object. You can instantiate an object from that function using the new keyword which will allow you to create something similar to a class in a standard OOP language.
I'd suggest ignoring __proto__ most of the time because it has poor cross browser support, and ...
How to create an object property from a variable value in JavaScript? [duplicate]
I want to add a new property to 'myObj', name it 'string1' and give it a value of 'string2', but when I do it it returns 'undefined:
...
How do I run a rake task from Capistrano?
...bin/env rake #{ENV['task']} RAILS_ENV=#{rails_env}")
end
end
Then, from /rails_root/, you can run:
cap staging rake:invoke task=rebuild_table_abc
share
|
improve this answer
|
...
How do I find the time difference between two datetime objects in python?
...conds, 60)
(0, 8) # 0 minutes, 8 seconds
Subtracting the later time from the first time difference = later_time - first_time creates a datetime object that only holds the difference.
In the example above it is 0 minutes, 8 seconds and 562000 microseconds.
...
How to check if an email address exists without sending an email?
...
VRFY user
You can issue a RCPT, and see if the mail is rejected.
MAIL FROM:<>
RCPT TO:<user@domain>
If the user doesn't exist, you'll get a 5.1.1 DSN. However, just because the email is not rejected, does not mean the user exists. Some server will silently discard requests like t...
What's a correct and good way to implement __hash__()?
...
Aside from the minor overhead from factoring out the __key function, this is about as fast as any hash can be. Sure, if the attributes are known to be integers, and there aren't too many of them, I suppose you could potentially run...
what is the difference between OLE DB and ODBC data sources?
... (excellent diagram here), he says precisely what MOZILLA said.
(directly from page 7 of that book)
ODBC provides access only to relational databases
OLE DB provides the following features
Access to data regardless of its format or location
Full access to ODBC data sources and OD...