大约有 23,000 项符合查询结果（耗时：0.0430秒） [XML]
Why should I declare a virtual destructor for an abstract class in C++?
I know it is a good practice to declare virtual destructors for base classes in C++, but is it always important to declare virtual destructors even for abstract classes that function as interfaces? Please provide some reasons and examples why.
...
Modify file in place (same dest) using Gulp.js and a globbing pattern
...as the globbed path is used for the dest as well. Simply pipe to the same base directory you're globbing the src from, in this case "sass":
gulp.src("sass/**/*.scss")
.pipe(sass())
.pipe(gulp.dest("sass"));
If your files do not have a common base and you need to pass an array of paths, this ...
Why do I have to access template base class members through the this pointer?
...le in template <typename T> struct Foo : T::A {};, T::A is used as a base class and hence is unambiguously a type. If Foo is instantiated with some type that has a data member A instead of a nested type A, that's an error in the code doing the instantiation (phase 2), not an error in the templ...
Overriding fields or properties in subclasses
I have an abstract base class and I want to declare a field or a property that will have a different value in each class that inherits from this parent class.
...
Change branch base
...
Use --onto for that:
git rebase --onto newBase oldBase feature/branch
Given your case:
git checkout PRO # Just to be clear which branch to be on.
git rebase --onto master demo PRO
Basically, you take all the commits from after demo up to PRO, and ...
Calling a base class's classmethod in Python
...
super(Derived, cls).do(a)
This is how you would invoke the code in the base class's version of the method (i.e. print cls, a), from the derived class, with cls being set to the derived class.
share
|
...
Copy constructor for a class with unique_ptr
...ove strategy works for simple types like int. If you have a unique_ptr<Base> that stores a Derived, the above will slice.
– Yakk - Adam Nevraumont
Apr 16 '13 at 18:35
6
...
How to use concerns in Rails 4
...ecially named module ClassMethods, and that this module is extended by the base class be ActiveSupport::Concern, too.
– febeling
Sep 17 '13 at 7:10
1
...
Should __init__() call the parent class's __init__()?
... a case of whether the you/the subclass needs "something", but whether the base class needs something in order to be a valid base class instance and work correctly. As implementer of the derived class, base class internals are things that you cannot/should not know, and even if you do because you wr...
Python unit test with base and sub class
...lass CommonTests(object):
def testCommon(self):
print 'Calling BaseTest:testCommon'
value = 5
self.assertEquals(value, 5)
class SubTest1(unittest.TestCase, CommonTests):
def testSub1(self):
print 'Calling SubTest1:testSub1'
sub = 3
self.asser...