ndx ·

Indexing functions for a lightweight javascript (TypeScript) full-text indexing and searching library ndx.

Documentation

Add Document to the Index

function addDocumentToIndex<I, D>(
  index: Index<I>,
  fieldAccessors: Array<(doc: D) => string>,
  tokenizer: (s: string) => string[],
  filter: (s: string) => string,
  id: I,
  document: D,
): void;

addDocumentToIndex() adds document to an index.

Example

import { createIndex } from "ndx";
import { addDocumentToIndex } from "ndx-index";

const index = createIndex(2);
const tokenizer = (s: string) => s.split(" ");
const filter = (s: string) => s;
function add(d) {
  addDocumentToIndex(
    index,
    [
      (d) => d.title,
      (d) => d.text,
    ],
    t,
    filter,
    d.id,
    d,
  );
}

const doc = {
  id: 1,
  title: "Title"
  text: "text",
};

add(doc);

Remove Document From the Index

function removeDocumentFromIndex<I>(
  index: Index<I>,
  removed: Set<I>, id: I,
): void;

removeDocumentFromIndex() adds document to a set of removed documents. This function doesn't automatically cleans up inverted index, but all items from the removed set will be ignored. vacuumIndex() function cleans up inverted index.

Clean Up Index

function vacuumIndex<I>(
  index: Index<I>,
  removed: Set<I>,
): void;

vacuumIndex() cleans up inverted index and resets set of removed documents.