Sequencing in JavaFx

def weekDays = ["Mon","Tue","Wed","Thu","Fri"];

explicitly specifying sequence type

def weekDays: String[] = ["Mon","Tue","Wed","Thu","Fri"];

Sequence within Sequence

def days = [weekDays, ["Sat","Sun"]];

compiler treats this as

def days = ["Mon","Tue","Wed","Thu","Fri","Sat","Sun"];

shorhand notation for sequence

def nums = [1..100];

more of this in here