Function addCommas

_benchmarks/sample_echarts.js:16432–16439

* Add a comma each three digit.

(x)

     */

    function addCommas(x) {
      if (!isNumeric(x)) {
        return isString(x) ? x : '-';
      }

      var parts = (x + '').split('.');
      return parts[0].replace(/(\d{1,3})(?=(?:\d{3})+(?!\d))/g, '$1,') + (parts.length > 1 ? '.' + parts[1] : '');
    }
    function toCamelCase(str, upperCaseFirst) {
      str = (str || '').toLowerCase().replace(/-(.)/g, function (match, group1) {
        return group1.toUpperCase();