大约有 24,000 项符合查询结果（耗时：0.0439秒） [XML]
How does free know how much to free?
...
FYI, for example BSD has malloc_size() to reliably access the block size from an malloc()ed pointer. But there's no reliable, portable way.
– laalto
Oct 5 '09 at 7:53
...
What's in an Eclipse .classpath/.project file?
... in the workspace does it refer to? What are the builders that are used in order to build the project? (remember, the concept of "build" doesn't pertain specifically to Java projects, but also to other types of projects)
The .classpath file is maintained by Eclipse's JDT feature (feature = set of p...
How to push different local Git branches to Heroku/master
..., you can push without using the -f, the -f (force flag) is recommended in order to avoid conflicts with other developers’ pushes.
share
|
improve this answer
|
follow
...
Update multiple rows in same query using PostgreSQL
... one column, it's much more generalizable:
update test as t set
column_a = c.column_a
from (values
('123', 1),
('345', 2)
) as c(column_b, column_a)
where c.column_b = t.column_b;
You can add as many columns as you like:
update test as t set
column_a = c.column_a,
column_c...
Concatenating two one-dimensional NumPy arrays
...There are several possibilities for concatenating 1D arrays, e.g.,
numpy.r_[a, a],
numpy.stack([a, a]).reshape(-1),
numpy.hstack([a, a]),
numpy.concatenate([a, a])
All those options are equally fast for large arrays; for small ones, concatenate has a slight edge:
The plot was created with perf...
Django MEDIA_URL and MEDIA_ROOT
...
# ... the rest of your URLconf goes here ...
) + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
You no longer need if settings.DEBUG as Django will handle ensuring this is only used in Debug mode.
ORIGINAL answer for Django <= 1.6
Try putting this into your urls.py
from...
Why isn't SQL ANSI-92 standard better adopted over ANSI-89?
...t. But then an SQL92 evangilist explained that would actually force a join order. JESUS... all those Copy pasters I've seen are now actually forcing a join order - a job that's 95% of the time better left to optimizers especially a copy/paster.
Tomalak got it right when he said,
people don't sw...
Configure Flask dev server to be visible across the network
...
Add below lines to your project
if __name__ == '__main__':
app.debug = True
app.run(host = '0.0.0.0',port=5005)
share
|
improve this answer
...
What is a C++ delegate?
...ouble d)> f = std::bind(&MyClass::DoStuff, this, std::placeholders::_1);
// auto f = std::bind(...); in C++11
Option 7: templates
Accept anything as long as it matches the argument list.
template <class FunctionT>
int DoSomething(FunctionT func)
{
return func(3.14);
}
...
How to .gitignore files recursively
... the repo root (parent directory of /Webapp).
– lucid_dreamer
May 6 '18 at 22:33
1
...