csv parsing

# in real life you probably won't store the file on disk, you'll just let users upload it in phoenix 
# and have it's value available as a variable

alias NimbleCSV.RFC4180, as: CSV

# if you're reading from disk
"path/to/csv/file"
|> File.stream!(read_ahead: 100_000)
|> CSV.parse_stream
|> Stream.map(fn [name, age] ->
  %{name: name, age: String.to_integer(age)}
end)

# if you've got the file's contents in memory or you stored it in the database and retreived it
"name,age,john,27"
|> CSV.parse_string
|> Enum.map(fn [name, age] ->
  %{name: name, age: String.to_integer(age)}
end)