subset is the opposite of superset
a=[0,1,2]
b=[0,1,2,3]
a is a subset of b. (a ⊂ b)
//all elements of a are in b
b is a superset of a. (b ⊃ a)
//b contains all elements of a
define superset programming
A super set is a programming language that contains all the features of a
given language and has been expanded or enhanced to include other features
as well.
Example - TypeScript is a superset of JavaScript.