From: Brian Candler <b.candler@...>
Date: 2010-02-22T21:40:23+09:00
Subject: Re: Difference between length and length()

Nike Mike wrote:
> Is there any difference between length and length().Pls explain

In general,

  foo.length
and
  foo.length()

are the same thing. They are calling a method 'length' on object 'foo' 
with no arguments.

However, a bareword 'length' with no receiver could be a local variable. 
Try the following in irb:

  def length
    return 123
  end

  length = 456
  length          # this is 456, not a call to method 'length'
  length()        # this calls the method 'length'
  self.length     # so does this
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