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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];
}