27 lines
659 B
JavaScript
27 lines
659 B
JavaScript
export function levenshtein(a, b) {
|
|
if (a.length === 0) return b.length;
|
|
if (b.length === 0) return a.length;
|
|
const matrix = [];
|
|
let i;
|
|
for (i = 0; i <= b.length; i++) {
|
|
matrix[i] = [i];
|
|
}
|
|
let j;
|
|
for (j = 0; j <= a.length; j++) {
|
|
matrix[0][j] = j;
|
|
}
|
|
for (i = 1; i <= b.length; i++) {
|
|
for (j = 1; j <= a.length; j++) {
|
|
if (b.charAt(i - 1) === a.charAt(j - 1)) {
|
|
matrix[i][j] = matrix[i - 1][j - 1];
|
|
} else {
|
|
matrix[i][j] = Math.min(
|
|
matrix[i - 1][j - 1] + 1,
|
|
Math.min(matrix[i][j - 1] + 1, matrix[i - 1][j] + 1)
|
|
);
|
|
}
|
|
}
|
|
}
|
|
return matrix[b.length][a.length];
|
|
}
|