unable to understand the syntax - scala

[Sherry Sethi]

 def above(that: Element): Element = { 
      val this1 = this widen that.width 
      val that1 = that widen this.width 
      assert(this1.width == that1.width)
      elem(this1.contents ++ that1.contents) 
    }

In the above code snippet - What do u mean by line 2? what is the value of this1 and what is implied by this line? I am new to scala and still learning my basics using the 

http://www.artima.com/pins1ed/assertions-and-unit-testing.html

Thanks in advance!

Regards

[Oliver Ruebenacker]

     Hello,

  I'm not sure where the confusion comes from - maybe from the fact that dots and parentheses can sometimes be omitted? Also, "this" refers to the enclosing object. The code is equivalent to:

def above(that: Element): Element = { 
      val this1 = this.widen(that.width) 
      val that1 = that.widen(this.width) 
      assert(this1.width == that1.width)
      elem(this1.contents ++ that1.contents) 
    }

  Does that help?

     Best, Oliver

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Oliver Ruebenacker

Senior Software Engineer, Diabetes Portal, Broad Institute