fix: Crash when comparing two long words
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parent
3834590c5a
commit
7e27203f74
@ -1,6 +1,6 @@
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{
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"name": "seminarfach",
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"version": "1.0.0",
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"version": "1.0.1",
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"description": "",
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"main": "index.js",
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"scripts": {
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@ -12,6 +12,7 @@
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"dependencies": {
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"@material-ui/core": "^1.5.1",
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"@material-ui/icons": "^2.0.3",
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"js-levenshtein": "^1.1.4",
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"react": "^16.4.2",
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"react-dom": "^16.4.2",
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"react-redux": "^5.0.7",
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@ -1,21 +0,0 @@
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import { lev, levW } from "../";
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test("lev(abc, abc) == 0", () => {
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expect(lev("abc", "abc", 3, 3)).toBe(0);
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expect(levW("abc", "abc")).toBe(0);
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});
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test("lev(abc, abd) == 1", () => {
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expect(lev("abc", "abd", 3, 3)).toBe(1);
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expect(levW("abc", "abd")).toBe(1);
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});
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test("lev(abc, abcd) == 1", () => {
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expect(lev("abc", "abcd", 3, 4)).toBe(1);
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expect(levW("abc", "abcd")).toBe(1);
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});
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test("lev(abcd, bcd) == 1", () => {
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expect(lev("abcd", "bcd", 4, 3)).toBe(1);
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expect(levW("abcd", "bcd")).toBe(1);
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});
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@ -1,30 +0,0 @@
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function one(a: string, b: string, i: number, j: number): number {
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if (a[i] === b[j]) {
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return 0;
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}
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return 1;
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}
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// Computes the difference between the strings a and b.
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// @a, b: The strings to compare
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// @i, j: From where to compare (a_i and b_j)
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// @ret : The distance in insertions, deletions and changes
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export function lev(a: string, b: string, i: number, j: number): number {
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if (Math.min(i, j) === 0) {
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return Math.max(i, j);
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} else {
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return Math.min(
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lev(a, b, i - 1, j) + 1,
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lev(a, b, i, j - 1) + 1,
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lev(a, b, i - 1, j - 1) + one(a, b, i, j)
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);
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}
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};
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// Computes the difference between the strings a and b.
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// @a, b: The strings to compare
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// @ret : The distance in insertions, deletions and changes
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export function levW(a: string, b: string): number {
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return lev(a, b, a.length, b.length);
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}
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@ -27,7 +27,8 @@ import {
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} from "../models/vocab";
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import { ReviewType, IReviewMetadata } from "../models/review";
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import { levW } from "../algorithms/levenshtein";
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//@ts-ignore
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import lev from "js-levenshtein";
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import {
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LEVENSHTEIN_MAX_DISTANCE, MAX_ERROR_THRESHOLD,
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REVIEW_HELP_MOD
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@ -213,7 +214,7 @@ const ReviewPageWithRouter = withRouter(
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// Map all possible answers to lowercase ( => ignore casing)
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const answers = current.answers.map((el) => el.toLowerCase());
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// Calculate the distances to all possible answers
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const dists = answers.map((el) => levW(input.toLowerCase(), el));
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const dists = answers.map((el) => lev(input.toLowerCase(), el));
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// Find the lowest distance
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const minDist = Math.min(...dists);
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