group_by fails on 1 row size DataFrame

[vanitu]

method fails when DataFrame size == 1

df=Daru::DataFrame.new([{a: :a, b: 1}], oder: [:name], index: [:test])

=> #<Daru::DataFrame(1x2)>
         a    b
 test    a    1

df.group_by(:a)
ArgumentError: Can't create DataFrame from [1]

[vanitu]

Issue is that method "access_row_tuples_by_indexs" returns 2 types of values

Example:

df=Daru::DataFrame.new([{a: 1, b: 2},{a:3,b:4}], index: [:test,:test2])

 => #<Daru::DataFrame(2x2)>
           a     b
  test     1     2
 test2     3     4

df2.access_row_tuples_by_indexs(:test)
 => [1, 2] #Array of values
df2.access_row_tuples_by_indexs(:test,:test2)
 => [[1, 2], [3, 4]] #Array of arrays

problem is that populate_row_for(positions) for Numeric position is not wrapped in array

def access_row_tuples_by_indexs *indexes
      positions = @index.pos(*indexes)

      return populate_row_for(positions) if positions.is_a? Numeric

      res = []
      new_rows = @data.map { |vec| vec[*indexes] }
      indexes.each do |index|
        tuples = []
        new_rows.map { |row| tuples += [row[index]] }
        res << tuples
      end
      res
    end

[vanitu]

I found that this error was fixed, but Daru gem is not released and still linked to 7month old version. When Daru release planned and what is the flow for that?

[zverok]

I found that this error was fixed, but Daru gem is not released and still linked to 7month old version. When Daru release planned and what is the flow for that?

In a day or two :)