From: Derek Cannon <novellterminator@...>
Date: 2010-03-26T11:49:43+09:00
Subject: Creating a gsub! method for Arrays

I'm new to Ruby. I'm trying to add a method to the Array class that adds
the functionality of gsub! to arrays.

Looking around the internet, I found a keyword know as detect { } which
allows me to get the elements of the array. Testing it, I find the
following code:

class Array
  def test
    detect { |x| puts x}
  end
end

...prints out all the elements in the array. However, when I try:

class Array
  def gsub!(pattern, replacement)
    detect { |x|
      x.gsub!(pattern, replacement)
      }
  end
end

...the result is only a modification of the first element in the array.
For example, the following code:

x = ["Hello", "there", "world", "how", "are", "you?"]
x.gsub!(/[aeiou]/, "_")
puts x

outputs only:
H_ll_
there
world
how
are
you?

Does anyone know what I'm doing wrong?
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