60 lines
963 B
Go
60 lines
963 B
Go
package flags
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func levenshtein(s string, t string) int {
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if len(s) == 0 {
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return len(t)
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}
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if len(t) == 0 {
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return len(s)
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}
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dists := make([][]int, len(s)+1)
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for i := range dists {
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dists[i] = make([]int, len(t)+1)
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dists[i][0] = i
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}
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for j := range t {
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dists[0][j] = j
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}
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for i, sc := range s {
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for j, tc := range t {
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if sc == tc {
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dists[i+1][j+1] = dists[i][j]
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} else {
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dists[i+1][j+1] = dists[i][j] + 1
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if dists[i+1][j] < dists[i+1][j+1] {
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dists[i+1][j+1] = dists[i+1][j] + 1
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}
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if dists[i][j+1] < dists[i+1][j+1] {
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dists[i+1][j+1] = dists[i][j+1] + 1
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}
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}
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}
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}
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return dists[len(s)][len(t)]
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}
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func closestChoice(cmd string, choices []string) (string, int) {
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if len(choices) == 0 {
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return "", 0
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}
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mincmd := -1
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mindist := -1
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for i, c := range choices {
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l := levenshtein(cmd, c)
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if mincmd < 0 || l < mindist {
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mindist = l
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mincmd = i
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}
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}
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return choices[mincmd], mindist
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}
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