大约有 44,000 项符合查询结果（耗时：0.0841秒） [XML]
When to use an object instance variable versus passing an argument to the method
...s.
Here's an example:
myCircle = myDrawing.drawCircle(center, radius);
Now lets imaging the myDrawing class uses 15 helper functions to create the myCircle object and each of those functions will need the center and the radius. They should still not be set as instance variables of the myDrawing...
What components are MVC in JSF MVC framework?
...The managed bean class can also contain the business logic.These are also known as backing beans which can have different scopes like request, session, application.
View - The user interface shown to the client i.e. .xhtml files. It gets the data from the managed beans and it is rendered as the resp...
How can I color Python logging output?
...essage only developers care about")
log.info("Curious users might want to know this")
log.warn("Something is wrong and any user should be informed")
log.error("Serious stuff, this is red for a reason")
log.critical("OH NO everything is on fire")
Output:
...
Angular directives - when and how to use compile, controller, pre-link and post-link [closed]
..... }
Entering the link phase, the link function returned via $compile is now provided with a scope.
First, the link function create a child scope (scope: true) or an isolated scope (scope: {...}) if requested.
The controller is then executed, provided with the scope of the instance element.
Pre...
How to overload std::swap()
...ave to use a free function; they establish the protocol. Second, I don't know why you object to having two implementations, but most classes are doomed to being sorted inefficiently if you can't accept having a non-member swap. Overloading rules ensure that if both declarations are seen, the more ...
Python (and Python C API): __new__ versus __init__
... Ahh, right, Shape.__init__() (if it had one) wouldn't be called. Now it's all making more sense... :¬)
– martineau
Jun 29 '18 at 21:01
...
F# development and unit testing?
...ange in the process of writing code. I have been using TDD for years in C# now, and really appreciate to have unit tests to know where I am at.
...
Understanding the difference between __getattr__ and __getattribute__
...we do instance.attribute. Sometimes we need more control (when we do not know the name of the attribute in advance).
For example, instance.attribute would become getattr(instance, attribute_name). Using this model, we can get the attribute by supplying the attribute_name as a string.
Use of __ge...
ASP.NET MVC ambiguous action methods
...I hadn't seen the RequireRequestValue attribute yet. That's a good one to know.
– CoderDennis
Jun 25 '09 at 21:24
1
...
Python argparse mutual exclusive group
...ee why the first two arguments are compatible and the last one isn't.
So now I run parser.parse_args() and check it's content:
args = parser().parse_args()
print args.aggregation
if args.aggregation and (args.query or args.fields):
print "-a and -q|-f are mutually exclusive ..."
sys.exit...