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17 lines
329 B
Go
17 lines
329 B
Go
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package util
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// Difference returns the elements in `a` that aren't in `b`.
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func Difference(a, b []string) []string {
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mb := make(map[string]struct{}, len(b))
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for _, x := range b {
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mb[x] = struct{}{}
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}
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var diff []string
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for _, x := range a {
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if _, found := mb[x]; !found {
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diff = append(diff, x)
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}
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}
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return diff
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}
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