Consider the following example, which should print 8. Why does the A.Value + B.Value thinks that B.Value should be a string? How do I fix it?
Portfolio variance is calculated as: port_var = W\'_p * S * W_p for a portfolio with N assest where W\'_p = transpose of vector of weights of stocks in portfolios
Suppose I\'m using the typeclass pattern in Scala.Here\'s how I make a class C part of the typeclass Foo:
According to the documentation, PartiallyOrdered[A] is covariant in A, while Ordered[A] is invariant (but used to be covariant) in A.
Now I am confused. I am quite new on Scala, having worked with it for a few weeks, I think I am getting familiar with it, but I am stuck on the appar开发者_如何学Pythonently trivial following case.
Given the following: trait Fruit class Apple extends Fruit class Orange extends Fruit case class Crate[T](value:T)
I couldn\'t find much when I searched for s开发者_JAVA百科tandard deviations and population variances on fortran 95. So I\'m wondering if someone could help me? Thanks for your time.
Here\'s another one for implicits and path dependent types. I don\'t understand why I need to be so verbose here: (Note -- I found the answer, see below)
What is the best w开发者_如何学编程ay in Matlab to get the mean and variance of a uniform distribution over [0,1]?.Mean and variance of an empirical distribution are calculated the same way for any di
My understanding is that the type variance is used in the following cases: If a generic type G has type parameter T1, which appears as a type of an argument of a G method, then G开发者_运维知识库 ca
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