// Diff will return the difference of two set
Diff will return the difference of two set
// Diff will return the difference of two set
func (s *StringSet) Diff(b *StringSet) *StringSet {
	diffSet := NewStringSet()
	for k := range s.Data {
		if !b.Has(k) {
			diffSet.Add(k)
		}
	}
	return diffSet
}
func ( s * StringSet ) Diff ( b * StringSet ) * StringSet { diffSet := NewStringSet ( ) for k := range s . Data { if ! b . Has ( k ) { diffSet . Add ( k ) } } return diffSet }
Diff will return the difference of two set
Diff will return the difference of two set