string-metric/dist/NormalizedLevenshtein.js

Get string similarity in JavaScript or TypeScript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.NormalizedLevenshtein = void 0;
var Levenshtein_1 = require("./Levenshtein");
var utils_1 = require("./utils/utils");
var NormalizedLevenshtein = /** @class */ (function () {
    function NormalizedLevenshtein() {
        this.l = new Levenshtein_1.Levenshtein();
    }
    NormalizedLevenshtein.prototype.distance = function (s1, s2) {
        if (utils_1.isNullOrUndefined(s1)) {
            throw new Error('s1 must neither be null nor undefined');
        }
        if (utils_1.isNullOrUndefined(s2)) {
            throw new Error('s2 must neither be null nor undefined');
        }
        if (s1 === s2) {
            return 0;
        }
        var mLen = Math.max(s1.length, s2.length);
        if (mLen === 0) {
            return 0;
        }
        return this.l.distance(s1, s2) / mLen;
    };
    NormalizedLevenshtein.prototype.similarity = function (s1, s2) {
        return 1 - this.distance(s1, s2);
    };
    return NormalizedLevenshtein;
}());
exports.NormalizedLevenshtein = NormalizedLevenshtein;