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string_set.go

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query-builder

/

string_set.go

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package set

var exists = struct{}{}

type stringSet struct {

m map[string]struct{}

}

func NewStringSet() *stringSet {

s := &stringSet{}

s.m = make(map[string]struct{})

return s

}

func (s *stringSet) Add(value string) {

s.m[value] = exists

}

func (s *stringSet) AddValues(values []string) {

for _, v := range values {

s.Add(v)

}

}

func (s *stringSet) Remove(value string) {

delete(s.m, value)

}

func (s *stringSet) RemoveValues(values []string) {

for _, v := range values {

s.Remove(v)

}

}

func (s *stringSet) Contains(value string) bool {

_, c := s.m[value]

return c

}

func (s *stringSet) ToSlice() []string {

r := make([]string, 0, len(s.m))

for k := range s.m {

r = append(r, k)

}

return r

}