From: Avi S g <avishek.sen.gupta@...>
Date: 2006-11-20T06:16:17+09:00
Subject: The last evaluated expression for this method?

I wrote a simple version of the collect method for the Array class 
called my_collect. Here is what I wrote:

class Array
  def my_collect
    result = []
    self.each {|element| result.push(yield(element))}
    result
  end
end

x = [1,2,3].my_collect {|element| element + 1}
print x

It prints out 234 correctly. However, I was puzzled by what x contained 
if I removed the return value 'result', that is:

class Array
  def my_collect
    result = []
    self.each {|element| result.push(yield(element))}
    #Removed return value
  end
end

x = [1,2,3].my_collect {|element| element + 1}
print x

It prints out 123. Why? The last evaluated expression would probably be 
result.push(yield(3)), and since push returns the resulting array, 
wouldn't it be 234 in this case as well?

Thanks,
FeralHound

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