A world-class math input for the web
pulljosh.com
1export type StrandPath = { tokenIndex: number; childIndex: number }[];
2export type TokenPath = {
3 strandPath: StrandPath;
4 tokenIndex: number;
5};
6
7export function strandPathsEqual(a: StrandPath, b: StrandPath): boolean {
8 if (a.length !== b.length) return false;
9 for (let i = 0; i < a.length; i++) {
10 if (a[i].tokenIndex !== b[i].tokenIndex) return false;
11 if (a[i].childIndex !== b[i].childIndex) return false;
12 }
13 return true;
14}
15
16export function strandPathIsAncestor(
17 parent: StrandPath,
18 child: StrandPath
19): boolean {
20 if (parent.length >= child.length) return false;
21 for (let i = 0; i < parent.length; i++) {
22 if (parent[i].tokenIndex !== child[i].tokenIndex) return false;
23 if (parent[i].childIndex !== child[i].childIndex) return false;
24 }
25 return true;
26}