code: function isNumberString(value) {
      let numberReg = /^((-?\d*\.?\d*(?:e[+-]?\d*(?:\d?\.?|\.?\d?)\d*)?)|(0[0-7]+)|(0x[0-9a-f]+))$/i;
      return lodash.isString(value) && !isEmpty(value) && numberReg.test(value);
  }
docs: Checks if value is a string that contains only numbers
  
  @param {any} value
  @returns {boolean}