rohinp

//this wont work as type T is unware of the operation + 
//value 0 is not a zero value for type T
def summ[T](xs:List[T]):T = xs.foldLeft(0)(_ + _)

rohinp

//We will take a really simple example of summing a list of ints
def summ(xs:List[Int]):Int = xs.foldLeft(0)(_ + _)
//there is a reason why we have selected foldLeft operation
//May be later in the blog it will be clear.

rohinp

trait Monoid[T] {
    def associative(t1:T,t2:T):
    def zero:T
  }