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Converting an array of objects to ActiveRecord::Relation
...e def self.subjects variety, scopes, etc) on this array. The only way I know to run class methods on a group of objects is to have them be an ActiveRecord::Relation. So I end up resorting to adding a to_indicators method to Array .
...
Learning Ruby on Rails
As it stands now, I'm a Java and C# developer. The more and more I look at Ruby on Rails, the more I really want to learn it.
...
check android application is in foreground or not? [duplicate]
...regroud = new ForegroundCheckTask().execute(context).get();
Also let me know if I misunderstand..
UPDATE: Look at this SO question Determining the current foreground application from a background task or service fore more information..
Thanks..
...
Remove all classes that begin with a certain string
...eral groups. Each group has a specific prefix. In the javascript, I don't know which class from the group is on the div. I want to be able to clear all classes with a given prefix and then add a new one. If I want to remove all of the classes that begin with "bg", how do I do that? Something like th...
Good way of getting the user's location in Android
...rk(newer)");
return networkLocation;
}
}
/**
* get the last known location from a specific provider (network/gps)
*/
private Location getLocationByProvider(String provider) {
Location location = null;
if (!isProviderSupported(provider)) {
return null;
}
Locatio...
How can I shrink the drawable on a button?
...
Now the image is displayed but it does not get resized! I tried values between 0.1f and 10f. Any idea? Thanks for your help...
– Reto
Sep 24 '11 at 16:01
...
MySQL: Set user variable from result of query
...ame} and this '{variable_name}', we can replace it with our variable name.
Now, how to assign a value in a variable in mysql. For this we have many ways to do that
Using keyword 'SET'.
Example :-
mysql > SET @a = 1;
Without using keyword 'SET' and using ':='.
Example:-
mysql > @a:=1;
B...
How to convert vector to array
...
There's a fairly simple trick to do so, since the spec now guarantees vectors store their elements contiguously:
std::vector<double> v;
double* a = &v[0];
share
|
imp...
Why do enum permissions often have 0, 1, 2, 4 values?
... == 00000010
Permissions.Delete == 4 == 00000100
Notice a pattern here? Now if we take my original example, i.e.,
var permissions = Permissions.Read | Permissions.Write;
Then...
permissions == 00000011
See? Both the Read and Write bits are set, and I can check that independently (Also not...
How to use clock() in C++
...d::chrono::high_resolution_clock Clock;
int main()
{
auto t1 = Clock::now();
auto t2 = Clock::now();
std::cout << "Delta t2-t1: "
<< std::chrono::duration_cast<std::chrono::nanoseconds>(t2 - t1).count()
<< " nanoseconds" << std:...