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How to get instance variables in Python?
...
You can also test if an object has a specific variable with:
>>> hi_obj = hi()
>>> hasattr(hi_obj, "some attribute")
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How do I make a list of data frames?
...pieces for cross-validation. Maybe you want to split mtcars into training, test, and validation pieces.
groups = sample(c("train", "test", "validate"),
size = nrow(mtcars), replace = TRUE)
mt_split = split(mtcars, f = groups)
# and mt_split has appropriate names already!
Simulatin...
Why is creating a Thread said to be expensive?
...0.38 us
Time for a task to complete in the same thread 0.08 us
This is a test for a trivial task which exposes the overhead of each threading option. (This test task is the sort of task that is actually best performed in the current thread.)
final BlockingQueue<Integer> queue = new LinkedBl...
Getting multiple keys of specified value of a generic Dictionary?
...n new List<TFirst>(list); // Create a copy for sanity
}
}
class Test
{
static void Main()
{
BiDictionary<int, string> greek = new BiDictionary<int, string>();
greek.Add(1, "Alpha");
greek.Add(2, "Beta");
greek.Add(5, "Beta");
Sho...
How do you stop MySQL on a Mac OS install?
...L via MacPorts . What is the command I need to stop the server (I need to test how my application behave when MySQL is dead)?
...
Mockito: InvalidUseOfMatchersException
...cceeds, the command proceeds with further tasks. I am trying to write unit tests for this using Mockito. Here's my code:
5 ...
Difference between shadowing and overriding in C#?
... reference and object must be of the same type.
class A
{
public void Test()
{
Console.WriteLine("base");
}
}
class B : A
{
public new void Test()
{
Console.WriteLine("sub");
}
public static void Main(string[] args)
{
A a = new A();
...
How to choose an AES encryption mode (CBC ECB CTR OCB CFB)?
...y background. Cryptography is extremely subtle and it's nigh impossible to test the security of a system.
Comparison of the modes
Encryption only:
Modes that require padding:
Like in the example, padding can generally be dangerous because it opens up the possibility of padding oracle attacks. The e...
Can a C# class inherit attributes from its interface?
...<T>())
yield return attribute;
}
}
Barebones NUnit test
[TestFixture]
public class GetAttributesTest
{
[AttributeUsage(AttributeTargets.All, AllowMultiple = true, Inherited = true)]
private sealed class A : Attribute
{
// default equality for Attributes i...
What online brokers offer APIs? [closed]
...or free. I don't remember all the details, but it let you connect to their test server and pull quotes and make fake trades and such to get your software fine tuned.
Don't know much about cost for an actual account or anything.
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