Hello all 
,
I have a map like this -
%{
"key1" => ["val1","val2","val3","val4","val5"]
"key2" => ["val1","val2","val3","val4","val5"]
}
now I need to write this into a csv like this -
I have researched about this and found that you can do this with NimbleCSV by-
def write_csv_file() do
data = key_mapping()
File.write!("data.csv", [@bom, data_to_csv(data)])
end
def data_to_csv(data) do
data
|> Enum.map(fn {key, list} ->
[key | list]
end)
|> MyParser.dump_to_iodata()
|> :unicode.characters_to_binary(:utf8, {:utf16, :little})
end
but currently, I am planning to do this in batches that means I will create batches of data and then write them to the CSV file, but I have no idea on how to do that without deleting the data written by the previous batch.
Any thoughts on how I should proceed?
