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Separate Back Stack for each tab in Android using Fragments
... time I wanted to use Fragments.
So this is how I done it.
1. Create a base Fragment Class
public class BaseFragment extends Fragment {
AppMainTabActivity mActivity;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mAct...
Multiple Inheritance in C#
...ed questions are ones like:- "What do you do when you have multiple common base classes in the different superclasses?
Perl is the only language I've ever worked with where MI works and works well. .Net may well introduce it one day but not yet, the CLR does already support MI but as I've said, the...
Rails migration for has_and_belongs_to_many join table
...
Where:
class Teacher < ActiveRecord::Base
has_and_belongs_to_many :students
end
and
class Student < ActiveRecord::Base
has_and_belongs_to_many :teachers
end
for rails 4:
rails generate migration CreateJoinTableStudentTeacher student teacher
fo...
Understanding :source option of has_one/has_many through of Rails
... have three models, Pet, Dog and Dog::Breed.
class Pet < ActiveRecord::Base
has_many :dogs
end
class Dog < ActiveRecord::Base
belongs_to :pet
has_many :breeds
end
class Dog::Breed < ActiveRecord::Base
belongs_to :dog
end
In this case, we've chosen to namespace the Dog::Breed, b...
Should operator
...
For char istream and ostream
The following code will work only for char-based streams.
// OUTPUT << A
std::ostream & operator << (std::ostream & p_oOutputStream, const Paragraph & p_oParagraph)
{
// do the insertion of p_oParagraph
return p_oOutputStream ;
}
// INP...
How to set selected item of Spinner by value, not by position?
I have a update view, where I need to preselect the value stored in database for a Spinner.
25 Answers
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Why there is no ConcurrentHashSet against ConcurrentHashMap
HashSet is based on HashMap.
9 Answers
9
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PHP $_SERVER['HTTP_HOST'] vs. $_SERVER['SERVER_NAME'], am I understanding the man pages correctly?
...$_SERVER['HTTP_HOST'] (aside from implementing some other custom handshake based on the user request). Pro devs do not trust the things they don't understand completely. So they either have their SAPI setup perfectly correctly (in which case the option they use will give the correct result), or they...
byte[] to hex string [duplicate]
...sult: 010204081020
If you want a more compact representation, you can use Base64:
string base64 = Convert.ToBase64String(data);
Result: AQIECBAg
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libxml install error using pip
...talled **
From the lxml documentation, assuming you are running a Debian-based distribution :
sudo apt-get install libxml2-dev libxslt-dev python-dev
For Debian based systems, it should be enough to install the known build dependencies of python-lxml or python3-lxml, e.g.
sudo apt-get build-de...