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'use strict';
const modifiedPaths = require('./modifiedPaths');
module.exports = function updatedPathsByArrayFilter(update) {  if (update == null) {    return {};  }  const updatedPaths = modifiedPaths(update);
  return Object.keys(updatedPaths).reduce((cur, path) => {    const matches = path.match(/\$\[[^\]]+\]/g);    if (matches == null) {      return cur;    }    for (const match of matches) {      const firstMatch = path.indexOf(match);      if (firstMatch !== path.lastIndexOf(match)) {        throw new Error(`Path '${path}' contains the same array filter multiple times`);      }      cur[match.substring(2, match.length - 1)] = path.        substring(0, firstMatch - 1).        replace(/\$\[[^\]]+\]/g, '0');    }    return cur;  }, {});};