The Set is a collection of unordered values with no duplicates.
You can initialize a Set with an array of values, in which case duplicates are ignored:
s1 = Set.new( [1,2,3,4,5,2] ) s2 = Set.new( [1,1,2,3,4,4,5,1] ) s3 = Set.new( [1,2,100] ) weekdays = Set.new( %w( Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday ) )
You can add new values using the add method:
s1.add( 1000 )
The merge method combines values of one set with another:
s1.merge(s2)
You can use == to test for equality.
Two sets that contain the same values are considered to be equal:
p( s1 == s2 ) #=> true
To sort a set, convert a set to an array using the to_a method and use a standard or custom sort:
p( weekdays.to_a.sort ) # sort alphabetically