dox | JavaScript documentation generator for node | Runtime Evironment library

The documentation in the multiprocessing module is quite clear about that. When you run a module with multiprocessing, that launches a brand new process, with a brand new interpreter, which has to import your main module and all the modules it needs. If you don't have your one-time-only code in an if __name__=='__main__': block, like the documentation suggests, then it will get re-run in every process that launches.

This is why you should get in the habit of putting your app's main code in an def main(): and doing

You can simply loop over the related Document objects from the Event object itself by using document_set (the default related_name for Document i.e. the model name in lowercase with _set appended). Also you can optimise the number of queries made by using prefetch_related [Django docs]:

In your view:

An Eigen::VectorXd is defined as typedef Matrix VectorXd; so it is a special form of an Eigen::Matrix. You are trying to subtract a scalar ys.mean() from a vector ys which is an coefficient-wise operation. The Eigen::Matrix class is not intended to be used with coefficient-wise operations but for linear algebra. For performing coefficient-wise operations Eigen has the Eigen::Array class.

Therefore it is sufficient to convert your Eigen::Matrix ys to an Eigen::Array for your formula to work:

When I understand it correct you want to use the LaTeX command \mytable in your LaTeX output / resulting pdf.

Most steps done are correct thought the problem is that \mytable is a LaTeX command and not a doxygen command, so you have to make it known in the doxygen parsed comment.

For this there are a few possibilities:

• the \latexonly ... \endlatexonly i.e. in the comment add:

If you have more unknowns than equations for sure your system will be indeterminate, the rank of a 8 x 16 matrix is at most 8, thus you have at least 16 degrees of freedom.

Further more if you have bounds to your variables i.e. mixed equalities and inequalities, then your problem is better posed as a linear programming. You can set a dummy objective function c[i] = 0, you could use GLPK but that is a very generic solution. If you want a small code snipped you probably can find a toy implementation of the Simplex method that will satisfy your needs.

I may be reading the Eigen documentation differently: I do not think you can 'pick' elements from a matrix or vector by injecting an integer vector. If it did as you do above with nz then the simpler below would compile. But it doesn't. Meaning your very clever and very highly aggregate 'update' expression does not work.

Should you include files when invoking methods declared in it?

Yes.

But what about if you wish to invoke a method X::doX()? Does this require an include, forward declaration, or neither?

Definition of the class is required to call member functions of the class.

Automatic type deduction can easily hide the types that we depend on. If we were to rewrite:

You need to use an extra pair of parenthesis. Also there is no point in templating this constructor since the template argument type needs to match the scalar type of the Eigen vector and if you'd like the scalar type to be configurable you'd need to template the whole class.

In summary

There are a few issues I can see:

1. I don't see any reference syntax in your code, since I don't see any "&"s. The only thing you have are moves. If you start to break away from that syntax, it begins to ruin things.
2. You're also using both "reference" and "borrow" in your javascript, which is confusing, because they mean the same thing in Rust.
3. You don't have a type for doX's parameters, which means you can't handle that variable properly, because it could be a move, which could cause scope problems for the calling function.
4. How did b become a reference to x?

Rust / Understanding Ownership:
https://doc.rust-lang.org/book/ch04-00-understanding-ownership.html

Here's a synopsis of the above link:

For all of this, when I say "variable," I mean "variable that uses the heap." Also, feel free to substitute/interpret "reference" as "borrow."

A variable gets dropped at the end of its scope, if it is still valid. Dropping means freeing the memory. Scope is from when the variable is introduced to the last time it's used. If there are any references to this variable that are still in scope, it's an error.

By default, variables are moved instead of copied.

When a variable is copied, a new, unique variable is created and the data is copied. This creates an entirely new, independent variable.

When a variable is moved to another variable, the initial variable is marked invalid and can no longer be used. (A big tradeoff of this style of memory management.) The new variable points to the same heap data that the old variable did. If the initial variable is used after being marked invalid, it's an error.

A variable can be moved by assigning it to another variable in one of three ways:

1. directly. e.g. x = y
2. by setting the value of a function parameter. e.g. f(x)
3. by returning it from a function, e.g. x = f()

If you pass a variable to another function and want to continue using it after that call, then the function has to "give it back" by returning it (another major deviation from expectations). This is just (2) followed by (3), e.g. x = f(x).

It's possible to create two types of references to a variable: immutable (default) and mutable. A reference just points to the variable instead of the data.

You can have an unlimited number of immutable references to a variable. You can only have one mutable reference, and only if you have no other types of references (including immutable) in scope.

When references are out of scope, they do not call drop. It's an error for references to continue to exist when the variable to which they point has been dropped.

If I were to implement this, I would do the following in order:

• get scope working. This is the time from when a variable or reference is first introduced to the time it is last used. Note that scopes in the same block may or may not overlap.
• get copy working
• get move working, including the drop aspect. detect scope extending beyond validity. Do this in stages, for move types (1), (2), (3) as shown above.
• get immutable reference working, error if attempt to change variable, error if scope beyond validity.
• get mutable reference working, error if any other reference in scope, error if scope is beyond validity.