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Android: Difference between onInterceptTouchEvent and dispatchTouchEvent?
... are woefully inadequate about explaining this.
dispatchTouchEvent is actually defined on Activity, View and ViewGroup. Think of it as a controller which decides how to route the touch events.
For example, the simplest case is that of View.dispatchTouchEvent which will route the touch event to ei...
What is a lambda expression in C++11?
... }
} f;
std::for_each(v.begin(), v.end(), f);
}
however this is not allowed, f cannot be passed to a template function in C++03.
The new solution
C++11 introduces lambdas allow you to write an inline, anonymous functor to replace the struct f. For small simple examples this can be cleaner t...
Remove blank attributes from an Object in Javascript
How do I remove all attributes which are undefined or null in a JavaScript object?
37 Answers
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How do I access the request object or any other variable in a form's clean() method?
... but how can I access the request object? Can I modify the clean method to allow variables input?
11 Answers
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PostgreSQL - Rename database
...isconnect from the database to be renamed
\c postgres
-- force disconnect all other clients from the database to be renamed
SELECT pg_terminate_backend( pid )
FROM pg_stat_activity
WHERE pid <> pg_backend_pid( )
AND datname = 'name of database';
-- rename the database (it should now have...
How to get error message when ifstream open fails
...
Every system call that fails update the errno value.
Thus, you can have more information about what happens when a ifstream open fails by using something like :
cerr << "Error: " << strerror(errno);
However, since every s...
Ruby Gem install Json fails on Mavericks and Xcode 5.1 - unknown argument: '-multiply_definedsuppres
I was trying run gem install json and got the following error
10 Answers
10
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Python Nose Import Error
...stem path. The following fixed this:
source myvirtualenv/activate
pip install nose
which nosetests
/home/me/myvirtualenv/bin/nosetests
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When can I use a forward declaration?
I am looking for the definition of when I am allowed to do forward declaration of a class in another class's header file:
1...
Best database field type for a URL
...er is subject to the maximum row size (65,535 bytes, which is shared among all columns) and the character set used.
So ...
< MySQL 5.0.3 use TEXT
or
>= MySQL 5.0.3 use VARCHAR(2083)
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