search for: vartanian

All, I am looking for an optimization library that does well on something as chaotic as the Schwefel function: schwefel <- function(x) sum(-x * sin(sqrt(abs(x)))) With these guys, not much luck: > optim(c(1,1), schwefel)$value [1] -7.890603 > optim(c(1,1), schwefel, method="SANN", control=list(maxit=10000))$value [1] -28.02825 > optim(c(1,1), schwefel, lower=c(-500,-500),

All, I am looking for an optimization library that does well on something as chaotic as the Schwefel function: schwefel <- function(x) sum(-x * sin(sqrt(abs(x)))) With these guys, not much luck: > optim(c(1,1), schwefel)$value [1] -7.890603 > optim(c(1,1), schwefel, method="SANN", control=list(maxit=10000))$value [1] -28.02825 > optim(c(1,1), schwefel, lower=c(-500,-500),

I had a beginner''s question. I am testing the create action on my controller. I wanted to fetch the ID parameter of the newly created object, so that I can make some assertions on it. But I can''t seem to find an elegant way of doing that. Of course, might create action redirects. That means that @response.redirect_url is something like "/show/8". So I could pluck

Hello. I will appreciate the opinion. What is the standard way of separating admin functions from normal- user functions? before_filter in one controller? Use two controllers, i.e. ProductController and Admin/ ProductController? I want to use map.resources so RESTFul would be better. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to

For controller action filters, I cannot seem to find the syntax for validating nested request parameters. For example, let''s say I had an input field named "person[name]" verify :only => :create, :params => :person, :redirect_to => {:action => ''new''} What is the syntax for verifying the name property? I have tried out every

I''ve often felt the need including Rails'' view helpers within my controllers, if only for some simple things like formatting my flash notices with text helpers or html escaping. I loved this suggestion, which helps by not cluttering the namespace of controllers: http://snippets.dzone.com/posts/show/1799 But I wanted to generalize this a little to automatically include whatever