大约有 40,000 项符合查询结果（耗时：0.0419秒） [XML]
What is the __del__ method, How to call it?
...y block or to a context manager in a with statement. However, there are valid use cases for __del__: e.g. if an object X references Y and also keeps a copy of Y reference in a global cache (cache['X -> Y'] = Y) then it would be polite for X.__del__ to also delete the cache entry.
If you know tha...
What's the difference between a catalog and a schema in a relational database?
...sical storage structures, as well as much other information, to help it decide how to implement user requests. Likewise, the security subsystem uses catalog information about users and security constraints to grant or deny such requests in the first place.
An Introduction to Database Systems, 7th ...
Best approach for designing F# libraries for use from both F# and C#
...er-level comments. First of all, you should read the F# Component Design Guidelines (referenced already by gradbot). This is a document that explains how to design F# and .NET libraries using F# and it should answer many of your questions.
When using F#, there are basically two kinds of libraries y...
Do you (really) write exception safe code? [closed]
...e in code
Eschew std::sprintf, snprintf, and arrays in general - use std::ostringstream for formatting and replace arrays with std::vector and std::string
When in doubt, look for functionality in Boost or STL before rolling your own
I can only recommend that you learn how to use exceptions properl...
What is Cache-Control: private?
...er your question about why caching is working, even though the web-server didn't include the headers:
Expires: [a date]
Cache-Control: max-age=[seconds]
The server kindly asked any intermediate proxies to not cache the contents (i.e. the item should only be cached in a private cache, i.e. only o...
Why do 64-bit DLLs go to System32 and 32-bit DLLs to SysWoW64 on 64-bit Windows?
...4, contains the 32-bit DLLs. The file system redirector does the magic of hiding the real System32 directory for 32-bit processes and showing SysWOW64 under the name of System32."
Edit: If you're talking about an installer, you really should not hard-code the path to the system folder. Instead, let...
How to extract a git subdirectory and make a submodule out of it?
...
git subtree rocks!
– Simon Woodside
Apr 7 '11 at 4:27
3
But isn't the point ...
How can I deploy/push only a subdirectory of my git repo to Heroku?
... to ignore, within the application sub path to be deployed. For example I did not want spec folder on heroku. Example Gist
– ch4nd4n
Nov 6 '12 at 13:19
...
How to use WeakReference in Java and Android development?
...
Using a WeakReference in Android isn't any different than using one in plain old Java. Here is a great guide which gives a detailed explanation: Understanding Weak References.
You should think about using one whenever you need a reference to an object, ...
What is the JSF resource library for and how should it be used?
...module/theme name where all of those resources commonly belong to.
Easier identifying
This way it's so much easier to specify and distinguish where those resources belong to and/or are coming from. Imagine that you happen to have a primefaces.css resource in your own webapp wherein you're overridi...