code: function DSVStr (str, options) {
      const defaultOption = {
          firstRowHeader: true,
          fieldSeparator: ','
      };
      options = Object.assign({}, defaultOption, options);
  
      const dsv = d3Dsv(options.fieldSeparator);
      return DSVArr(dsv.parseRows(str), options);
  }
docs: Parses and converts data formatted in DSV string to a manageable internal format.
  
  @todo Support to be given for https://tools.ietf.org/html/rfc4180.
  @todo Sample implementation https://github.com/knrz/CSV.js/.
  
  @param {string} str - The input DSV string.
  @param {Object} options - Option to control the behaviour of the parsing.
  @param {boolean} [options.firstRowHeader=true] - Whether the first row of the dsv string data is header or not.
  @param {string} [options.fieldSeparator=","] - The separator of two consecutive field.
  @return {Array} Returns an array of headers and column major data.
  @example
  
  // Sample input data:
  const data = `
  a,b,c
  1,2,3
  4,5,6
  7,8,9
  `