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Android: How can I pass parameters to AsyncTask's onPreExecute()?
...here all the stuff you want to do in the background, in a different thread from the main one. Here we have as an input value an array of objects from the type “X” (Do you see in the header? We have “...extends AsyncTask” These are the TYPES of the input parameters) and returns an object from...
Android and setting alpha for (image) view alpha
...ew ImageView(this);
myImageView.setAlpha(xxx);
In pre-API 11:
range is from 0 to 255 (inclusive), 0 being transparent and 255 being opaque.
In API 11+:
range is from 0f to 1f (inclusive), 0f being transparent and 1f being opaque.
...
Why do we need virtual functions in C++?
...you overload func() so it takes a Cat*? If you have to derive more animals from Animal they would all need their own func().
The solution is to make eat() from the Animal class a virtual function:
class Animal
{
public:
virtual void eat() { std::cout << "I'm eating generic food."...
PostgreSQL: Which Datatype should be used for Currency?
...it doesn't.
For a more official source, read this thread in pgsql-general (from just this week!), with statements from core developers including D'Arcy J.M. Cain (original author of the money type) and Tom Lane:
Related answer (and comments!) about improvements in recent releases:
Jasper Report: un...
What is the difference between '@' and '=' in directive scope in AngularJS?
...bute?
Yes, but only if you don't use an isolate scope. Remove this line from your directive
scope: { ... }
and then your directive will not create a new scope. It will use the parent scope. You can then access all of the parent scope properties directly.
The documentation says "Often it...
What is an uninterruptible process?
...ler is executed.
If the process is still running, it gets the return value from the system call, and it can make the same call again.
Returning early from the system call enables the user space code to immediately alter its behaviour in response to the signal. For example, terminating cleanly in r...
$.focus() not working
...e. The reason that's not working is simply because it's not stealing focus from the dev console. If you run the following code in your console and then quickly click in your browser window after, you will see it focus the search box:
setTimeout(function() { $('input[name="q"]').focus() }, 3000);
...
Make the current Git branch a master branch
... Note about git's merge "strategies": --strategy=ours is different from --strategy=recursive -Xours. I.e. "ours" can be a strategy in itself (result will be the current branch no matter what), or passed as an option to the "recursive" strategy (bring in other branch's changes, and automatica...
Why does this Java code compile?
...se restrictions are intended to prevent code like
int j = i;
int i = j;
from compiling. The Java spec says "the restrictions above are designed to catch, at compile time, circular or otherwise malformed initializations."
What do these rules actually boil down to?
In short, the rules basically s...
How to get the seconds since epoch from the time + date output of gmtime()?
...datetime.datetime.utcnow()- ep).total_seconds()
This should be different from int(time.time()), but it is safe to use something like x % (60*60*24)
datetime — Basic date and time types:
Unlike the time module, the datetime module does not support leap seconds.
...