packages/node_modules/pouchdb-mapreduce/src/evalFunctionWithEval.js

import scopedEval from 'scope-eval';
import { guardedConsole } from 'pouchdb-utils';
import sum from './sum';

var log = guardedConsole.bind(null, 'log');
var isArray = Array.isArray;
var toJSON = JSON.parse;

function evalFunctionWithEval(func, emit) {
  return scopedEval(
    "return (" + func.replace(/;\s*$/, "") + ");",
    {
      emit: emit,
      sum: sum,
      log: log,
      isArray: isArray,
      toJSON: toJSON
    }
  );
}

export default evalFunctionWithEval;