大约有 19,602 项符合查询结果（耗时：0.0186秒） [XML]
What is the performance cost of having a virtual method in a C++ class?
...ing as virtual. If all functions are virtual everything can be replaced by base classes - public, protected, private - everything becomes fair game. By accident or intention subclasses could then change the behavior of functions that then cause problems when used in the base implementation.
...
Can a class member function template be virtual?
...
@ddriver: 1. If the compilers sees void f(concr_base& cb, virt_base& vb) { cb.f(); vb.f(); }, then it "knows" which function is invoked at the point cb.f() called, and does not know that for vb.f(). The latter has to be found out at runtime, by the runtime system. ...
Rails auto-assigning id that already exists
...
I did this which solved the issue for me.
ActiveRecord::Base.connection.tables.each do |t|
ActiveRecord::Base.connection.reset_pk_sequence!(t)
end
I found the reset_pk_sequence! from this thread. http://www.ruby-forum.com/topic/64428
...
How to manage local vs production settings in Django?
...ng in development and production. And every developer has a different code base.I call anti-pattern here.
– pydanny
Jan 31 '13 at 16:25
8
...
FragmentPagerAdapter Exists Only In Android.Support.V4.App (and not Android.App)
... protected override void OnCreate (Bundle bundle)
{
base.OnCreate (bundle);
SetContentView(Resource.Layout.fragment_pager);
List<Fragment> fragments = new List<Fragment>();
// *** MonoDroid 4.2.7 letter case bug *** make's fir...
How to generate unique ID with node.js
How to set a variable value with database query callback? How I can do it?
13 Answers
...
How can I detect if this dictionary key exists in C#?
... Adam, that's really (not) helpful. What's the class hierarchy? What's the base type?
– John Saunders
May 13 '10 at 20:44
add a comment
|
...
What does “The APR based Apache Tomcat Native library was not found” mean?
...
It means exactly what it says: "The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path"
The library referred to is bundled into an OS specific dll (tcnative-1.dll) loaded via JN...
Interface vs Abstract Class (general OO)
...fferences -
Interfaces can't have any concrete implementations. Abstract base classes can. This allows you to provide concrete implementations there. This can allow an abstract base class to actually provide a more rigorous contract, wheras an interface really only describes how a class is used....
File name? Path name? Base name? Naming standard for pieces of a path
...for a "standard" naming convention will be in vain. Here are my proposals, based on existing, well-known programs:
A) C:\users\OddThinking\Documents\My Source\Widget\foo.src
Vim calls it file root (:help filename-modifiers)
B) C:\users\OddThinking\Documents\My Source\Widget\foo.src
file n...