compromise/src/result/subset/values/toNumber/parseNumeric.js

natural language processing in the browser

'use strict';
//parse a string like "4,200.1" into Number 4200.1
const parseNumeric = (str) => {
  //remove ordinal - 'th/rd'
  str = str.replace(/1st$/, '1');
  str = str.replace(/2nd$/, '2');
  str = str.replace(/3rd$/, '3');
  str = str.replace(/([4567890])r?th$/, '$1');
  //remove prefixes
  str = str.replace(/^[$€¥£¢]/, '');
  //remove suffixes
  str = str.replace(/[%$€¥£¢]$/, '');
  //remove commas
  str = str.replace(/,/g, '');
  //split '5kg' from '5'
  str = str.replace(/([0-9])([a-z]{1,2})$/, '$1');
  return parseFloat(str);
};

module.exports = parseNumeric;