Category "model"

Solving coupled differential equations with sympy

I am trying to solve the following system of first order coupled differential equations: - dR/dt=k2*Y(t)-k1*R(t)*L(t)+k4*X(t)-k3*R(t)*I(t) - dL/dt=k2*Y(t)-k1*

Adding scope to get objects in reverse order of their created time in rails

I'm new to Ruby on rails and programming. I am working on a exercise where I have a Post model,and I need to add a new scope to it to retrieve its objects in re

django temporarily disable signals

I have a signal callback in django: @receiver(post_save, sender=MediumCategory) def update_category_descendants(sender, **kwargs): def children_for(cat

SysML FlowProperties and FlowSpecification in Enterprise Architect (9.3)

I'm trying to define a SysML FlowSpecification and add FlowProperties to it. I can't find any specific way to add flow properties and the standard add Property

How to query database by id using SqlAlchemy?

I need to query a SQLAlchemy database by its id something similar to User.query.filter_by(username='peter') but for id. How do I do this? [Searching over Googl

Yii model to array?

How can I convert the result of Trips::model()->findAll() to an array?