Module: WebStruct::Page::CsvHeaderSniffer

Defined in:
lib/webstruct/page/csv_header_sniffer.rb

Overview

Heuristic for whether the first row of a CSV/TSV body is a header row. Conservative: returns false when uncertain. See README.

Constant Summary collapse

NUMERIC =

A numeric cell is a string that matches this regex.

/\A-?\d+(?:\.\d+)?\z/

Class Method Summary collapse

Class Method Details

.first_row_headers?(body, separator = ",") ⇒ Boolean

Returns true when the first row of a CSV/TSV body is a header row.

Conservative: returns false when uncertain. See README.

Parameters:

  • body (String)
  • separator (String) (defaults to: ",") —

    comma or tab

Returns:

  • (Boolean) —

    whether to pass headers: true to CSV.parse



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# File 'lib/webstruct/page/csv_header_sniffer.rb', line 23

def first_row_headers?(body, separator = ",")
  rows = first_two_rows(body, separator)

  return false if rows.size < 2

  header_like_first_row?(rows[0], rows[1])
end