Merge pull request #26 from prometheus/feature/fingerprinting/set
Add formal fingerprint sets for intersection ops.
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commit
28445c8c86
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@ -161,3 +161,44 @@ func (f Fingerprints) Less(i, j int) bool {
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func (f Fingerprints) Swap(i, j int) {
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f[i], f[j] = f[j], f[i]
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}
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type FingerprintSet map[Fingerprint]bool
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func (s FingerprintSet) Equal(o FingerprintSet) bool {
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if len(s) != len(o) {
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return false
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}
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for k := range s {
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if _, ok := o[k]; !ok {
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return false
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}
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}
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return true
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}
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func (s FingerprintSet) Intersection(o FingerprintSet) FingerprintSet {
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myLength, otherLength := len(s), len(o)
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if myLength == 0 || otherLength == 0 {
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return FingerprintSet{}
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}
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subSet := s
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superSet := o
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if otherLength < myLength {
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subSet = o
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superSet = s
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}
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out := FingerprintSet{}
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for k := range subSet {
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if _, ok := superSet[k]; ok {
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out[k] = true
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}
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}
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return out
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}
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