Function buildPositionMap

packages/text-search/src/tokenizer.ts:156–167

(tokens: Token[])

 * @returns Map of stemmed term to array of positions
 */
export function buildPositionMap(tokens: Token[]): Map<string, number[]> {
  const positions = new Map<string, number[]>();
  for (const token of tokens) {
    const existing = positions.get(token.stemmed);
    if (existing) {
      existing.push(token.position);
    } else {
      positions.set(token.stemmed, [token.position]);
    }
  }
  return positions;
}