Module: ObjectTable::Printable

Included in:
TableMethods
Defined in:
lib/object_table/printable.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.calc_column_widths(columns) ⇒ Object 



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# File 'lib/object_table/printable.rb', line 11

def self.calc_column_widths(columns)
  columns.map{|col| col.flatten.map(&:length).max}
end

.get_printable_column(column) ⇒ Object 



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# File 'lib/object_table/printable.rb', line 3

def self.get_printable_column(column)
  column.shape[-1].times.map do |i|
    row = column[false, i]
    str = row.is_a?(NArray) ? row.inspect.partition("\n")[-1].strip : row.inspect
    str.split("\n")
  end
end

Instance Method Details

#_format_rows(rows, widths) ⇒ Object 



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# File 'lib/object_table/printable.rb', line 25

def _format_rows(rows, widths)
  rows.flat_map do |row|
    height = row.map(&:length).max

    row = row.zip(widths).map do |cell, width|
      cell += [" "] * (height - cell.length)
      cell.map{|i| i.rjust(width)}
    end

    row.transpose.map(&:join)
  end
end

#_format_section(row_slice) ⇒ Object 



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# File 'lib/object_table/printable.rb', line 15

def _format_section(row_slice)
  numbers = row_slice.map{|i| ["#{i}: "]}
  section = columns.map do |name, c|
    c = c.slice(false, row_slice)
    ObjectTable::Printable.get_printable_column(c)
  end

  [numbers] + section
end

#inspect(max_section = 5, col_padding = 2) ⇒ Object 



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# File 'lib/object_table/printable.rb', line 38

def inspect(max_section = 5, col_padding = 2)
  header = "#{self.class}(#{nrows}, #{ncols})\n"

  return (header + "(empty table)") if ncols == 0
  return (header + "(empty table with columns: #{colnames.join(", ")})") if nrows == 0

  column_headers = [''] + colnames.map(&:to_s)

  if nrows > max_section * 2
    head = _format_section(0 ... max_section)
    tail = _format_section((nrows - max_section) ... nrows)

    columns = [column_headers, head, tail].transpose
    widths = NArray.to_na(ObjectTable::Printable.calc_column_widths(columns)) + col_padding
    total_width = widths.sum

    rows = _format_rows(head.transpose, widths)
    rows.push('-' * total_width)
    rows += _format_rows(tail.transpose, widths)

  else
    section = _format_section(0...nrows)
    columns = [column_headers, section].transpose
    widths = NArray.to_na(ObjectTable::Printable.calc_column_widths(columns)) + col_padding
    rows = _format_rows(section.transpose, widths)
  end

  column_headers = _format_rows([[column_headers].transpose], widths).join
  header + ([column_headers] + rows + [column_headers]).join("\n")

rescue NoMethodError => e
  raise Exception.new(e)
end