(q, doc []string)
| 128 | } |
| 129 | |
| 130 | func overlapScore(q, doc []string) float64 { |
| 131 | set := make(map[string]struct{}, len(doc)) |
| 132 | for _, t := range doc { |
| 133 | set[t] = struct{}{} |
| 134 | } |
| 135 | var hit float64 |
| 136 | for _, t := range q { |
| 137 | if _, ok := set[t]; ok { |
| 138 | hit++ |
| 139 | } |
| 140 | } |
| 141 | if hit == 0 { |
| 142 | return 0 |
| 143 | } |
| 144 | return hit / float64(len(q)) |
| 145 | } |