Rails: getting multiple selected values from selection box

I got stuck for last half an hour at ‘getting the values of multiple selected items in a muliple selection box’ using Ruby/Rails. Got it after hard ‘googling’ and got the solution here.
When trying to get multiple selected values from a <SELECT> tag into @params, call your parameter something with [] on the end. [...]

sending mails using ruby

There is a very common requirement especially in web services, that of sending notification email for some action say, addition/deletion/updation of database in user signup or product selection in a shopping cart. Ruby handles it beautifully. This is obvious. What is not obvious is that it actually gives user different ways of implementing it.

RubyMail
TMail
ActionMailer (uses [...]