I can understand the
method in scala which basically is applying a function to a value. In many cases this is used as a form of constructor.
Let's assume that
is a map. An example would be
def apply(id : Int) = list(id)
, where it gets the given element from the list.
I also came across the example of the update method as
def update(id:Int,name:String) = list = list + (id -> name)
I can understand what this does i.e it updates/adds a key value pair in the list. What I cannot understand is the method contains two
symbols, one after the method definition and one which after list which defines what the method actually does
list + (id -> name)
What is the need for two
signs? How is one different from one another? I know that after the
sign the method body starts, but this is confusing.