We have seen
def in previous SKBs but we haven't encountered the keyword
Try to figure out by yourself what
lazy does. Make sure to read the print statements in the console as you run the code.
Did you figure it out ?
lazy allows a value to not be evaluated until the very first time it is called. If you call the value again, the previously computed value will be used.
val the value is computed instantly as the value is declared. You were able to see the print statement early in the log, before all the others.
def, this is a method, so each time you call the method, you are recomputing the result.
val: Computed once when declared
lazy val: Computed once when called
def: Computed each time it is called