What is the statement like lambda definition in the first line after class definition in Scala?

Question

What is the meaning of a=> in the below code? is it a pointer like this to the instantiated object?

class A {
  a=>
  def methodB()={
     .....
  }
}

Answer 1

It is called a self reference or self type. In your case it means "create a symbol of name 'a' and point it to the this reference".

See the SO Scala tutorial in section "Self references" (chapter 17) for more information:

1. Self references
   • Unify types
   • Self reference naming
   • Multiple self references
   • Difference between self references and subtyping