# Session arrays, vectors and matrices in Rails... and even ruby **URL:** \ **Category:** Rails\ **Created:** [November 16, 2008, 5:02am UTC](https://www.ruby-forum.com/t/session-arrays-vectors-and-matrices-in-rails-and-even-ruby/153390 "2008-11-16T05:02:29Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![The\_N](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/edb3f5/32.png) [@The\_N](https://www.ruby-forum.com/u/The_N)\ **Post date:** [November 16, 2008, 5:02am UTC](https://www.ruby-forum.com/t/session-arrays-vectors-and-matrices-in-rails-and-even-ruby/153390/1 "2008-11-16T05:02:29Z")
Hello… I just want to make a simple question: is there a way to make arrays, vectors and matrices with SESSION VARIABLES on Ruby and Rails? I’m making a Rails app and I need to save all the data in session variables before saving it to the DB. the catch here is the following logic: element1 has many element2s values stored element2 has many element3s values stored Meaning this: session[:element1] session[:element2][] session[:element3][][] Hope you can answer me this, with a possible solution to this as I have little experience to do this on this language and in this framework. Later, The N. ---
**Author:** ![The\_N](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/edb3f5/32.png) [@The\_N](https://www.ruby-forum.com/u/The_N)\ **Post date:** [November 16, 2008, 1:37pm UTC](https://www.ruby-forum.com/t/session-arrays-vectors-and-matrices-in-rails-and-even-ruby/153390/2 "2008-11-16T13:37:08Z")
On Nov 16, 4:02 am, The N. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Hello… > > I just want to make a simple question: is there a way to make arrays, > vectors and matrices with SESSION VARIABLES on Ruby and Rails? I’m Yup. Just do it. Construct your array, vector or matrix as you would normally and then put it in the session as you would a number or a string. Fred ---
**Author:** ![The\_N](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/edb3f5/32.png) [@The\_N](https://www.ruby-forum.com/u/The_N)\ **Post date:** [November 16, 2008, 4:04pm UTC](https://www.ruby-forum.com/t/session-arrays-vectors-and-matrices-in-rails-and-even-ruby/153390/3 "2008-11-16T16:04:24Z")
Can the arrays be as many dimensions as I want? Because I took a look on how to make the vector and matrices and it looks complicated. No offense. Is there and example where I can do such a thing with arrays? Later… The N. ---
**Author:** ![The\_N](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/edb3f5/32.png) [@The\_N](https://www.ruby-forum.com/u/The_N)\ **Post date:** [November 16, 2008, 4:15pm UTC](https://www.ruby-forum.com/t/session-arrays-vectors-and-matrices-in-rails-and-even-ruby/153390/4 "2008-11-16T16:15:31Z")
On Nov 16, 3:03 pm, The N. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Can the arrays be as many dimensions as I want? Because I took a look > on how to make the vector and matrices and it looks complicated. No > offense. Is there and example where I can do such a thing with arrays? Personally I would save the matrix and vector classes for actually doing matrix math. I think your specification of the problem so far is not concrete enough for me to be able to volunteer a solution, but you can certainly have something like x = [[[1,2,3], [4,5,6]],[[7,8,9],[10,11,12]]] x[0][1][2] #=\> 6 At this point this isn’t really a rails question any more - you may find more opinions on the ruby-talk list. Fred