33 lines
419 B
Go
33 lines
419 B
Go
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package main
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type set struct {
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m map[string]struct{}
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}
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func (s *set) add(key string) {
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s.m[key] = struct{}{}
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}
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func (s *set) has(key string) bool {
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var ok bool
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_, ok = s.m[key]
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return ok
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}
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func (s *set) forEach(f func(string)) {
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for key := range s.m {
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f(key)
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}
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}
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func newSet(elems []string) *set {
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s := &set{
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m: make(map[string]struct{}),
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}
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for _, elem := range elems {
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s.add(elem)
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}
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return s
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}
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