大约有 47,000 项符合查询结果（耗时：0.0633秒） [XML]
What exactly are unmanaged resources?
...nections
Unmanaged memory
In XNA: vertex buffers, index buffers, textures, etc.
Normally you want to release those unmanaged resources before you lose all the references you have to the object managing them. You do this by calling Dispose on that object, or (in C#) using the using statement which...
Defining Z order of views of RelativeLayout in Android
I would like to define the z order of the views of a RelativeLayout in Android.
13 Answers
...
Convert Mercurial project to Git [duplicate]
... are probably better off not doing the conversion.
I did the following in order to get the repo ready for a second conversion attempt:
hg update -C stable
hg merge stable/hotfix-feature
hg ci -m "Merge with stable branch"
hg push git+ssh://git@bitbucket.org:myaccount/myrepo.git
After this I had ...
Efficient paging in SQLite with millions of records
...
Please note that you always have to use an ORDER BY clause; otherwise, the order is arbitrary.
To do efficient paging, save the first/last displayed values of the ordered field(s), and continue just after them when displaying the next page:
SELECT *
FROM MyTable
WHE...
Freely convert between List and IEnumerable
... List<T> variable.
If you don't see the LINQ extension methods like OrderBy() I'm guessing it's because you don't have a using System.Linq directive in your source file.
You do need to convert the LINQ expression result back to a List<T> explicitly, though:
List<Customer> list =...
How to fix a locale setting warning from Perl?
... connect to this older host from a newer desktop machine. It's common for /etc/ssh/sshd_config to contain
AcceptEnv LANG LC_*
which allows clients to propagate the values of those environment variables into new sessions.
The warning gives you a hint about how to squelch it if you don't require t...
What is the point of a private pure virtual function?
...lass. That is the OOP rules and it applies on all language that is OOP. In order for a derived class to implement its base class private virtual method, it has to be a friend of the base class. Qt has taken the same approach when they implemented their XML DOM document model.
–...
Is it possible to GROUP BY multiple columns using MySQL?
...
Preference of left to right is applied to the ascending order of the groupings and not the column group preference. GROUP BY applies col1+col2. e.g. col1 = 1, 2, 1, 2 | col2 = 1, 2, 3, 2 and running GROUP BY col1,col2 would return 1,1|1,3|2,2 as opposed to 1,1|2,2 as suggested. Wh...
How to query as GROUP BY in django?
... @Gidgidonihah True, the example should read Members.objects.order_by('disignation').values('designation').annotate(dcount=Count('designation'))
– bjunix
Oct 30 '14 at 15:16
...
When to use cla(), clf() or close() for clearing a plot in matplotlib?
...
They all do different things, since matplotlib uses a hierarchical order in which a figure window contains a figure which may consist of many axes. Additionally, there are functions from the pyplot interface and there are methods on the Figure class. I will discuss both cases below.
pyplot ...