Ruby grep - searching an array for parts of a string
class ExamineMail
        def initialize(user, domain, pass, box)
           @username = user
           @domain = domain
           @pass = pass
           @mailbox = box
        end

         def login()
            @imap = Net::IMAP.new("mail." + @domain)
            @imap.authenticate('LOGIN', @username + "@" + @domain, @pass)
            mailbox_array = @imap.list('','*').collect{ |mailbox| mailbox.name }
            #mailbox_array.any? { |w| @mailbox =~ /#{w}/ }
            mailbox_array.grep(/^@mailbox/)
         end
   end

#Get the list of inboxes
mailbox_array = imap.list('','*').collect{ |mailbox| mailbox.name }
=> ["INBOX", "INBOX.Trash", "INBOX.Sent", "INBOX.Sent Messages", "INBOX.Junk", "INBOX.Drafts", "INBOX.Deleted Messages", "INBOX.Apple Mail To Do"]

#Search for mailboxes including "Sent"
>> mailbox_array.grep(/^Sent/)
=> []

#Search for "INBOX"
>>             mailbox_array.grep(/^INBOX/)
=> ["INBOX", "INBOX.Trash", "INBOX.Sent", "INBOX.Sent Messages", "INBOX.Junk", "INBOX.Drafts", "INBOX.Deleted Messages", "INBOX.Apple Mail To Do"]

mailbox_array.grep(/Sent/)