From: Greg Ma <gregorylepacha@...>
Date: 2010-02-15T08:45:04+09:00
Subject: Compare and delete element from an array

Hi,
I try to compare an arroy of Tag and an array of string. I would like to
remove from my array of Tag all element that are in the array of string.
I,ve done the method below that should be working fine. When i look at
the console result, the element are equals, so is should be deleted but
it is not. I donc understand why??... :/

#Method in Student Class
def remove_tags(array_of_tags)
    if !array_of_tags.empty?
      array_of_tags.each do |tag|
        tags.delete_if {
          |x| x.name == tag
          puts x.name + "-"+ x.name.length.to_s
          puts tag + "-"+ tag.length.to_s
          puts "-----"
          }
      end
      puts tags
    end
  end

#result
Completed in 95ms (View: 83, DB: 5) | 200 OK
[http://localhost/students/1/edit]
moi-3
moi-3
-----
greg-4
moi-3
-----
#<Tag:0x10442cf98>
#<Tag:0x10442ced0>


Here we see that the first element should be deleted, but when i display
the array, it has not...
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