iems | Interactive Experiment Management System for Machine | Machine Learning library

I want to add items from Available classic to Chosen classic

how can i do that as in image below

i can get Chosen classic by

Profile.objects.get(user=request.user).classic.add(id=2)

but i can't add iems from Available classic to Chosen classic

any one can help this problem fast please Thanks for all

Models.py

I have a MILP problem with binary and continuous variables. I want to use the Benders' decomposition algorithm to solve it. I am following this presentation: http://www.iems.ucf.edu/qzheng/grpmbr/seminar/Yuping_Intro_to_BendersDecomp.pdf

I separate my problem into a master problem composed of the discrete variables and a slave problem that has the continuous variables.

I am using the CPLEX Python API to solve it, based on the ATSP example: https://github.com/cswaroop/cplex-samples/blob/master/bendersatsp.py

I create the master problem and the dual of the slave as in this example.

I use the BendersLazyConsCallback, but I am not sure I understand it entirely. Please help me through.

The function separate is called when the current master solution is obtained, then the dual objective function is updated, and the dual problem is re-solved.

If the dual is unbounded then it adds the ray to the master problem constraints, e.g., self.add(constraint = workerLP.cutLhs, sense = "L", rhs = workerLP.cutRhs), which happens in the BendersLazyConsCallback class.

But the example does not include the code when the dual is optimal. So, when the dual is optimal, I add a similar call and add the constraint to the master problem based on the dual solution.

However, if I try to print the master problem constraints, e.g., problem.linear_constraints.get_rows(), I do not see the newly included constraints. It seems that the self.add(constraint = workerLP.cutLhs, sense = "L", rhs = workerLP.cutRhs) command does not push this to the master constraints but keeps it as a member of the LazyConstraintCallback class. Is this correct? How can I see that these new constraints are actually added?

Also, how does the algorithm stop? In the traditional Benders' algorithm the lower and upper bounds of the problem are updated based the the dual and master solution and when they are equal we have convergence. In the ATSP example, I don't see where this is happening. When exactly is the BendersLazyConsCallback triggered and how does it know when to stop?

How do you get the currently highlighted/selected node from a TreeView control? Based on the documentation here it should be possible to iterate through the control's SelectedNodes property but its always empty.

EDIT: This turns out to be an actual bug with XAML, tracked here. Until it's fixed, the accepted answer does fine as work-around.

Context: I'm working on a simple demo application to explore the TreeView control. I'm trying to add a keyboard shortcut to delete the currently active/selected node. I have the delete functionality in a RelayCommand class that implements ICommand. I have already gotten it working from the TreeViewItem DataTemplate as a button and as a flyout menu. I couldn't see a clean way to reuse the ICommand in a keyboard shortcut.

Image of the app with the last-clicked item highlighted; I need to access this TreeViewItem in the code-behind so I can delete it when the TreeView has focus and the "Delete" key is pressed.

I have an event handler on the TreeView control:

I want to add dynamic elements using reactive forms in angular. I am following this link: https://alligator.io/angular/reactive-forms-formarray-dynamic-fields/.

I am doing exact similar to that link. But I am getting error. Below is the code:

ts file:

I want to use the json values in my c# code. So I have written the code like below