no implicit conversion from nil to integer - when trying to add anything to array

Question

I\'m trying to build a fairly complex hash and I am strangely getting the error

no implicit conversion from nil to integer

when I use the l

Answer 1

This seems to have been completely unrelated to anything that had anything to do with manufacturer_cols after all.

I had arrived at the manufacturer_cols bit because if I commented that out, it ran fine.

However, if I commented out the part where I ran through the csv further down the page, it ran fine also.

It turns out the error was related to retrieving attempting to append the base_field when it was nil.

I thought I could use

manufacturer_cols.each do |col|
   base_value = row[col[:row_index].to_i]

   if col[:merges]
       col[:merges].each do |merge|
           base_value += merge[:separator].to_s + row[merge[:merge_row_index]]
       end
   end
end

unfortunately, that caused the error. the solution was

 base_value = base_value + merge[:separator].to_s + row[merge[:merge_row_index]]

I hope this helps somebody, 'cause as DigitalRoss alluded to, it was quite a wild goose chase nailing down where in the code this was being caused and why.