mirror of
https://github.com/minio/minio.git
synced 2024-12-25 22:55:54 -05:00
67 lines
1.6 KiB
Go
67 lines
1.6 KiB
Go
/*
|
|
* Minio Client (C) 2014-2016 Minio, Inc.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
package main
|
|
|
|
import (
|
|
"math"
|
|
)
|
|
|
|
// Returns the minimum value of a slice of integers
|
|
func minimum(integers []int) (minVal int) {
|
|
minVal = math.MaxInt32
|
|
for _, v := range integers {
|
|
if v < minVal {
|
|
minVal = v
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
// DamerauLevenshteinDistance calculates distance between two strings using an algorithm
|
|
// described in https://en.wikipedia.org/wiki/Damerau-Levenshtein_distance
|
|
func DamerauLevenshteinDistance(a string, b string) int {
|
|
d := make([][]int, len(a)+1)
|
|
for i := 1; i <= len(a)+1; i++ {
|
|
d[i-1] = make([]int, len(b)+1)
|
|
}
|
|
for i := 0; i <= len(a); i++ {
|
|
d[i][0] = i
|
|
}
|
|
for j := 0; j <= len(b); j++ {
|
|
d[0][j] = j
|
|
}
|
|
for i := 1; i <= len(a); i++ {
|
|
for j := 1; j <= len(b); j++ {
|
|
cost := 0
|
|
if a[i-1] == b[j-1] {
|
|
cost = 0
|
|
} else {
|
|
cost = 1
|
|
}
|
|
d[i][j] = minimum([]int{
|
|
d[i-1][j] + 1,
|
|
d[i][j-1] + 1,
|
|
d[i-1][j-1] + cost,
|
|
})
|
|
if i > 1 && j > 1 && a[i-1] == b[j-2] && a[i-2] == b[j-1] {
|
|
d[i][j] = minimum([]int{d[i][j], d[i-2][j-2] + cost}) // transposition
|
|
}
|
|
}
|
|
}
|
|
return d[len(a)][len(b)]
|
|
}
|